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3D model of the interaction of the Earth's magnetosphere and the solar wind. It is a particle-in-cell model developed by Peter MacNeice (Hughes STX) on the MasPar MP-1 at NASA/GSFC, circa 1993. The animation shows a volume rendering of the ion density of the solar wind, with the Earth (not shown) near the center.
The same query as in the previous image, only 42 hours after launch...
More info here: postspectacular.com/work/socialcollider/start
Part of the official Google Chrome collection of original experiments demonstrating the superior JavaScript performance of Google's browser, the Social Collider reveals cross-connections between conversations on Twitter.
With the Internet's promise of instant and absolute connectedness, two things appear to be curiously underrepresented: both temporal and lateral perspective of our data-trails. Yet, the amount of data we are constantly producing provides a whole world of contexts, many of which can reveal astonishing relationships if only looked at through time.
This experiment explores these possibilities by starting with messages on the microblogging-platform Twitter. One can search for usernames or topics, which are tracked through time and visualized much like the way a particle collider draws pictures of subatomic matter. Posts that didn't resonate with anyone just connect to the next item in the stream. The ones that did, however, spin off and horizontally link to users or topics who relate to them, either directly or in terms of their content.
The Social Collider acts as a metaphorical instrument which can be used to make visible how memes get created and how they propagate. Ideally, it might catch the Zeitgeist at work.
Credits
Karsten Schmidt - concept, design & programming
Sascha Pohflepp - concept, design
Follow us on Twitter for updates:
Video Mapping Philipp Geist_Germany+Brazil 2013-2014_- Santa Marta 2014_©Fred Pacífico/Porã
„VideoInstallation by Philipp Geist“, "Philipp Geist", „Copyright 2014 Philipp Geist / VG Bildkunst 2014", www.videogeist.de, mail@videogeist.de, „Rio de Janeiro“, "Santa Marta“, „Cristo Redentor“, „Dona Marta“, „Deutschland + Brasilien 2013-2014“, “Alemanha + Brasil 2013-2014”
Photo by Fred Pacífico
©2014 Philipp Geist / VG BIldkunst Bonn
Rio de Janeiro / Brazil 2014
Christ statue (Cristo Redentor) – May 12
Dona Marta favela – May 15 and 16,2014
Light Art-Video-Mapping-Installations Philipp Geist in Rio de Janeiro / Brazil 2014
on the Christ statue (Cristo Redentor) - May 12 and in the Dona Marta favela - May 15 and 16,
2014
Installation Philipp Geist Year of Germany in Brazil 2013/2014
Concept Time Drifts May 2014
At the end of the Year of Germany in Brazil 2013/2014, the artist Philipp Geist (Berlin, 1976)
develops two light installations in Rio this year; the first one on the world-famous Christ statue
(Cristo Redentor) and the other installation in the Santa Marta favela. For the installation the
artist presents artistic-liberal and poetic German and Brazilian themes and develops a building
and floor light installation of colored words and phrases in Portuguese, German, and in other
international languages. The installation deals with cultural characteristics and achievements of
both countries and visualizes the issues of time and space, volatility and presence in a free
artistic style. The two projects are in fact a double project which is combined. The installation
on the symbol of Rio and Brazil, the Christ statue, is recorded and projected onto the small
buildings and huts of the favela. The Christ statue, which has been built to protect the city and
the sailors, is symbolically projected on the shantytown, the favela, in a protective way. The
installation in the favela will be seen not only on a facade as a large cinema projection or as a
static image, but on several winding buildings, the roofs, the floor and on the steps. Thus, the
visitor becomes a part of the installation and can immerse into the projection and the light and
introduce himself. Chalk crayons are put out on the streets in the favela and the young and old
residents and visitors can write and paint words on the street, the ground, the stairs or even on
the house walls. The residents and several institutions should be addressed to submit words and
associations dealing with Rio, Brazil and Germany.
For the installation, which was shown at the Luminale in 2012, the artist Philipp Geist won the
German Lighting Design Award 2013 (Deutscher Lichtdesign-Preis 2013) in the category Light Art.
The series 'Time Drifts' is characterized by the complex and subtle way of visualizing various
currents and voices in cultural contexts and to provide institutions and visitors with the
opportunity of substantive participation: different personalities, visitors and institutions may be
addressed in advance and then contribute words and associations. Current and historico-cultural
topics are researched in advance by the artist and then integrated in a sensitive and subtle way.
The projection dismisses the use of screens, because concepts and associations are projected on
a large area onto the floor surface on several facades and in theater fog. Over the course of two
days, the installation can be seen on-site in the favela on May 15 and 16 and on the Cristo
Redentor on May 12 for a day.
Short, tall, young and old visitors can interactively participate in the installation by tracing and
adding words with colored chalk crayons available on the streets. Thus, over the period of the
installation, a carpet of words is evolved with terms that are contributed locally by the visitors
by means of the temporary and volatile 'medium' of chalk crayons. Philipp Geist develops in this
way a dialogue between the place, the visitors and his artistic work.
The concrete, tangible projection of the architecture and the static terms on the floor area
represents the facts and visible relics that are responsible for our understanding of history. The
transparent and volatile projection in the fog reminds us that part of the history can not be
preserved and that it is created in our individual imagination in a single moment. Words are
briefly visible as a metaphor for transience and then disappear again. This interplay of the
various text and image layers in the space refers to the location and the history/-ies of Brazil
and Germany and the cultural exchange between the two countries. The visitors themselves are
part of the installation: they dive into the large floor projection. In this way, different
perspectives and experiences of space are unified. Abstract passages which are created, then
overlapped and displaced by each other symbolize the constant changes in history, the passage
of time and the transience of existence. Even the understanding of the past is in the flux. The
modern writings and formations created on the computer establish a connection to the present
and the possibilities of today's technology and show that the perception of history and culture
depends always on the possibilities and constraints of the present.
'Time Drifts - Words of Berlin' is part of a series of installations, which has been shown in recent
years by Philipp Geist, and which are always re-developed site-specifically and adapted to the
local conditions: In October 2012, Philipp Geist showed the installation on the entire Potsdamer
Platz (public square) and the Kolhoff Tower and Renzo Piano Tower skyscrapers. In April 2012
the installation was shown at the Luminale in Frankfurt where it was seen by more than 40,000
visitors and thus the main project of the Luminale 2012. In 2011, Philipp Geist presented the
'Time Drifts' installation in Vancouver at the Jack Poole Plaza, as well as in Montreal on the
Place des Arts in 2010. The 'Timing' installation was shown at the 2009 Glow Festival in
Eindhoven. In the end of 2009, on the occasion of the birthday of the King of Thailand, 2-3
million visitors saw his facade installation at the royal throne in Bangkok. Other projects
include: 'Timelines' at the prestigious Pallazzio delle Esposizioni (Rome, 2007), 'Time Fades'
at the Cultural Forum of Berlin and 'Broken Time Lines' at the old spa Kurhaus Ahrenshoop
(Germany, 2008).
Geist's projects are primarily characterized by their complexity concerning the integration of
space, sound and motion images. His video mapping installations waive screens and transform a
wide range of architectures in moving, picturesque light sculptures which challenge the viewer's
perception of two- and three-dimensionality.
www.alemanha-brasil.org/br/node/8542
www.alemanha-brasil.org/Programme/Dia/2014-05-12
www.alemanha-brasil.org/Programme/Dia/2014-05-15
www.alemanha-brasil.org/Programme/Dia/2014-05-16
---------------
Arte de luz - Instalações de Mapeamento de Vídeo por Philipp Geist no Rio de Janeiro / Brasil
2014 no Cristo Redentor no dia 12 de maio e na favela Santa Marta nos dias 15 e 16 de maio de
2014
Instalação Philipp Geist Ano Alemanha + Brasil 2013/2014
Conceito Time Drifts Maio 2014
No final do ano Alemnaha + Brasil 2013/2014, o artista Philipp Geist (1976, Berlim) desenvolverá
duas instalações de luz no Rio; uma delas será exibida na mundialmente famosa estátua do
Cristo Redentor, e a outra na favela Santa Marta. Para a instalação, o artista traz temas teutobrasileiros
de maneira liberal-artística e poética desenvolvendo instalações de luz em edifícios e
no solo a partir de palavras e conceitos coloridos em Português, Alemão e em outros idiomas
internacionais. A instalação lida com as peculiaridades e realizações culturais de ambos os países
e visualiza as questões de tempo e espaço e de volatilidade e presença no estilo liberal-artístico.
Os dois projetos em questão representam um projeto duplo que é combinado. A instalação na
estátua do Cristo Redentor, como um símbolo do Rio e do Brasil, será gravada e projetada nos
pequenos prédios e barracos da favela. A estátua do Cristo Redentor, que foi erguida para
proteger a cidade e os marinheiros, será então projetada como um símbolo de proteção em uma
favela. A instalação na favela é visto não apenas em uma fachada como uma projeção grande de
cinema ou como uma imagem estática, mas em vários prédios sinuosos, em telhados, no solo e
nas escadas. Desta maneira, o visitante conseguirá ser parte da instalação e imergir e mergulhar
na projeção e na luz. Na favela, será distribuído giz para pintura de rua, e os moradores e
visitantes, tanto jovens quanto velhos, podem escrever e pintar conceitos na rua, no solo, nas
escadas ou até mesmo nas paredes das casas. Os moradores e diversas instituições serão
convidados a contribuir com conceitos e associações que representam o Rio, o Brasil e a
Alemanha.
Para as instalações apresentadas na Luminal em 2012, o artista Philipp Geist ganhou o
'Deutscher Lichtdesign-Preis 2013” (Prêmio Alemão de Desenho de Luz de 2013) na categoria
Arte de Luz. A série Time Drifts caracteriza-se pela forma complexa e sutil de visualizar várias
correntes e vozes em contextos culturais e de oferecer a instituições e aos visitantes a
oportunidade de participar: diferentes personalidades, visitantes e instituições podem ser
contatados antecipadamente para contribuir com termos e associações. Temas atuais, históricos
e culturais serão previamente pesquisados pelo artista e, depois, integrados de uma forma
sensível e sutil. A projeção é realizada sem o uso de telas porque conceitos e associações são
projetados, em grande estilo, sobre a superfície do solo, em diversas frentes e envolvidos em
fumaça. Ao longo de dois dias, a instalação estará em exibição em 15 e 16 de maio na favela, e
em 12 de maio, por um dia, no Cristo Redentor.
Visitantes jovens e velhos podem envolver-se na instalação e traçar ou adicionar palavras com
giz colorido, que será distribuído, e assim participar interativamente na instalação. Desta
maneira, durante a duração da instalação, será desenvolvido um tapete de palavras. As palavras
serão fornecidas, no próprio local, pelos visitantes usando o giz, um meio temporário e volátil.
Philipp Geist desenvolve assim um diálogo entre o local, os visitantes e seu trabalho artístico.
A área de projeção concreta e tangível da arquitetura e os termos estáticos sobre a superfície do
solo representam os fatos e as relíquias visíveis que compõem a nossa compreensão da história. A
área de projeção transparente e sumindo por dentro da fumaça lembra que parte da história não
pode ser preservada e que ela é criada na nossa imaginação individual momentaneamente.
Conceitos são brevemente visíveis, como uma metáfora para a transitoriedade e, logo mais,
desaparecem. Esta interação entre as várias camadas de texto e de imagens no espaço refere-se
à localização e a(s) história(s) do Brasil e da Alemanha e o intercâmbio cultural entre os dois
países. Os próprios visitantes tornam-se parte da instalação: eles imergem na grande projeção
do solo. Desta forma, diferentes perspectivas e experiências de espaço são unidas. Passagens
abstratas que são formadas, sobrepostas e suprimidas pela próxima simbolizam as mudanças
contínuas na história, a passagem do tempo e a transitoriedade da existência. A compreensão do
passado também está no fluxo. As fontes e formações modernas criadas no computador
estabelecem uma conexão com o presente e com as possibilidades da tecnologia de hoje: a
percepção da história e da cultura sempre dependende das capacidades e limitações do
presente.
'Time Drifts - Words of Berlin' faz parte de uma série de instalações, que foram apresentadas
durante os últimos anos por Philipp Geist e que são sempre redesenvolvidas para as condições
locais específicas: em outubro de 2012, Philipp Geist exibiu a instalação em toda a praça
Potsdamer Platz (Berlim) e nos dois arranha-céus Kolhoff Tower (Berlim) e Renzo Piano Tower
(Londres). Em abril de 2012, a instalação foi apresentada no evento da Luminal em Frankfurt
onde foi vista por mais de 40.000 visitantes sendo o principal projeto da Luminal de 2012. Em
2011, Philipp Geist mostrou a instalação Time Drifts na praça Jack Poole Plaza em Vancouver
bem como em Montreal, Canadá, no centro de arte Place des Arts, em 2010. A instalação Timing
foi exibida no Glow Festival de 2009 in Eindhoven, Holanda. No final de 2009 e por ocasião do
aniversário do rei tailandês, aprox. 2 a 3 milhões de visitantes viram a instalação de fachada do
artista no trono real em Banguecoque. Seus outros projetos incluem: Time Lines, no prestigiado
museu Palazzio delle Esposizioni (Roma, 2007); Time Fades, no Fórum Cultural de Berlim;
Broken Time Lines, no antigo spa Kurhaus Ahrenshoop (Alemanha, 2008).
Os projetos de Geist são principalmente caracterizados por sua complexidade na integração de
espaço, som e imagens de movimento. Suas instalações de mapeamento de vídeo renunciam
telas e transformam uma ampla gama de arquiteturas em esculturas móveis e pitorescas que
desafiam a percepção do espectador de duas e três dimensões.
www.alemanha-brasil.org/br/node/8542
www.alemanha-brasil.org/Programme/Dia/2014-05-12
www.alemanha-brasil.org/Programme/Dia/2014-05-15
www.alemanha-brasil.org/Programme/Dia/2014-05-16
---------------
Lichtkunst-VideoMappingInstallationen Philipp Geist in Rio de Janeiro / Brasilien 2014
an der Christstatue (Cristo Redender) 12.5 und in der Favela Santa Marta 15./16.5.2014
Installation Philipp Geist Deutsch-Brasilianisches Jahr 2013/2014
Konzept Time Drifts Mai 2014
Zum Abschluss des Deutsch-Brasilianischen-Jahres 2013/2014 entwickelt der Berliner Künstler
Philipp Geist (1976) zwei Lichtinstallation in Rio d.J.; eine an der weltbekannten Christstatue
(Cristo Redender) und in die andere Installation in der Favela Santa Marta. Bei der Installation
greift der Künstler künstlerisch frei und poetisch deutsch brasilianische Themen auf und
entwickelt eine Gebäude- und Boden-Lichtinstallation aus farbigen Wörtern und Begriffen in
portugiesischer, deutscher, und in weiteren internationalen Sprachen. Die Installation thematisiert
kulturelle Besonderheiten und Errungenschaften beider Länder und visualisiert die Themen Zeit
und Raum, Flüchtigkeit und Präsenz in freien künstlerischen Art. Bei den beiden Projekten handelt
es sich um ein Doppelprojekt welches kombiniert wird. Die Installation auf das Wahrzeichen von
Rio und Brasilien die Christstatue, wird aufgenommen und auf die kleinen Gebäude und Hütten
der Favela projiziert. Die Christstatue die errichtet worden ist um die Stadt und Seeleute zu
schützen, wird so symbolisch schützend über ein Armenviertel die Favela projiziert. Dabei ist die
Installation in der Favela nicht nur auf einer Fassade als große Kinoprojektion oder als statisches
Bild zu sehen, sondern auf mehreren verwinkelten Gebäuden, den Dächern, den Boden und auf
den Stufen. Der Besucher wird vielmehr auf diese Weise selbst Teil der Installation und kann in die
Projektion und das Licht eintauchen und sich einbringen. In der Favela werden Strassenmalkreide
ausgelegt und die Bewohner und Besucher ob jung oder alt können Begriffe auf die Strasse, den
Boden, die Treppenstufen oder sogar auf die Hauswände schreiben und malen. Die Bewohner und
verschiedene Institutionen sollen angesprochen werden Assoziationen und Begriffe die für Rio,
Brasilien und Deutschland stehen einzureichen.
Für die 2012 bei der Luminale gezeigten Installation hat der Künstler Philipp Geist den Deutschen
Lichtdesign-Preis 2013 in der der Kategorie Lichtkunst gewonnen. Die Serie 'Time Drifts' zeichnet
sich aus durch die komplexe und die subtile Möglichkeit, verschiedenste Strömungen und
Stimmen in kulturellen Kontexten sichtbar zu machen und Institutionen und Besuchern die
Möglichkeit zur inhaltlichen Partizipation zu geben: Es können verschiedene Persönlichkeiten,
Besucher und Institute im Vorfeld angesprochen werden, die Begriffe und Assoziationen
beisteuern. Aktuelle und kulturhistorische Themen werden im Vorfeld vom Künstler recherchiert
und auf sensible und subtile Weise integriert. Die Projektion verzichtet auf den Einsatz von
Leinwänden, denn Begriffe und Assoziationen werden grossflächig auf die Bodenfläche, auf
mehrere Fassaden und in Theaternebel projiziert. Über den Zeitraum von 2 Tagen wird die
Installation vor Ort in der Favela am 15/16.Mai und die Installation am Cristo Redentor am 12.Mai
für einen Tag zu sehen sein.!
Kleine, große, junge und alte Besucher können sich einbringen in die Installation und mit farbiger
Straßenmalkreide, die ausgelegt wird, Wörter nachzeichnen und hinzufügen und so interaktiv an
der Installation teilnehmen. Über die Installationsdauer entsteht somit ein Wörterteppich aus
Begriffen, die vor Ort von den Besuchern selbst mittels dem temporären und flüchtigen 'Medium'
der Strassenmalkreide beigesteuert werden. Geist entwickelt auf diese Weise einen Dialog
zwischen dem Ort, den Besuchern und seiner künstlerischen Arbeit. ! !
Die konkrete, greifbare Projektionsfläche der Architektur und die statischen Begriffe auf der
Bodenfläche stehen für die Fakten und sichtbaren Relikte, welche unser Geschichtsverständnis
ausmachen. Die transparente, sich verflüchtigende Projektionsfläche im Nebel erinnert daran,
dass ein Teil der Geschichte nicht konserviert werden kann und im Moment in unserer individuellen
Vorstellung entsteht. Begriffe werden als Metapher für die Vergänglichkeit kurzzeitig sichtbar und
verschwinden sofort wieder. Dieses Zusammenspiel der verschiedenen Text- und Bildschichten im
Raum verweist auf den Ort und die Geschichte(n) Brasiliens und Deutschlands und den kulturellen
Austausch beider Länder. Die Besucher selbst werden Teil der Installation: sie tauchen in die
großflächige Bodenprojektion ein. Auf diese Weise vereinen sich unterschiedliche Perspektiven
und Raumerfahrungen. Abstrakte Passagen, die sich aufbauen, überlagern und gegenseitig
verdrängen, symbolisieren die ständigen Veränderungen in der Geschichte, den Lauf der Zeit und
die Flüchtigkeit des Seins. Auch das Verständnis von der Vergangenheit ist im Fluss. Die
modernen Schriften und Formationen, die am Computer entstanden sind, stellen eine Verbindung
zur Gegenwart und den Möglichkeiten der heutigen Technik her und zeigen, dass die Erfahrbarkeit
von Geschichte und Kultur immer von den Möglichkeiten und Rahmenbedingungen der Gegenwart
abhängig ist.
'Time Drifts - Words of Berlin' ist Teil einer Serie von Installationen, die Philipp Geist in den letzten
Jahren gezeigt hat, und die dabei immer wieder neu an die örtlichen Gegebenheiten ortsspezifisch
weiterentwickelt wird: Im Oktober 2012 zeigte Geist die Installation auf dem gesamten Potsdamer
Platz und den beiden Hochhäusern Kolhoff Tower und Renzo Piano Tower. Im April 2012 wurde die
Installation in Frankfurt auf der Luminale gezeigt, wurde von mehr als 40.000 Besuchern gesehen
und war das Hauptprojekt der Luminale 2012. Im Jahr 2011 zeigte Geist die Installation Time Drifts
in Vancouver am Jack-Poole Plaza, ebenso wie in Montreal am Place des Arts in 2010. Die
Installation 'Timing' war 2009 auf dem Glow Festival in Eindhoven zu sehen. Ende 2009 sahen
anlässlich des Geburtstages des thailändischen Königs ca. 2-3 Millionen Besucher seine
Fassadeninstallation am königlichen Thron in Bangkok. Andere Projekte waren u.a.: 'Time Lines'
am renommierten Museum delle Esposizioni (2007), 'Time Fades' am Berliner Kulturforum,
'Broken Time Lines' am alten Kurhaus Ahrenshoop (2008).
Geists Projekte sind in erster Linie gekennzeichnet durch ihre Komplexität in der Integration von
Raum, Ton und Bewegbild. Seine Video-Mapping-Installationen verzichten auf Leinwände und
verwandeln verschiedenste Architekturen in bewegte, malerische Lichtskulpturen, die die
Wahrnehmung der Betrachter von Zwei- und Dreidimensionalität herausfordern.
Ascent Penthouse
Client: Mr Dung - IAM Architecture
---
@ Long Nguyen & Thu Nguyen
Architecture - Interior Design & 3D Visualization
0979 962 864, Ho Chi Minh City
advlongnguyen@gmail.com
Architecture 3D Visualization
Client & Architect:
Chronos, Maas und Partner
Location: Münster, Hafen
Visualization: Renderfriends UG
Fresh House | Visualization Project
Project : L.A Apartment
Co-op with the company in Norway
Visualized by Fresh House
Client: Surbana International Consultants
3D Visualization Artist: 8 YOLK DESIGN STUDIO
Scope: 3D Modelling, Realistic Rendering, Photoshop-enhancing,
visit us: www.8yolkstudio.com
Fresh House | Visualization Project
Project : L.A Apartment
Co-op with the company in Norway
Visualized by Fresh House
Ascent Penthouse
Client: Mr Dung - IAM Architecture
---
@ Long Nguyen & Thu Nguyen
Architecture - Interior Design & 3D Visualization
0979 962 864, Ho Chi Minh City
advlongnguyen@gmail.com
1534 vehicles, during October 2009, with its routes condensed and mapped in the same image. Each color corresponds to one vehicle. Closeup at downtown.
PhraseNet of family tree in the Bible. Live visualization available on Many Eyes at: manyeyes.alphaworks.ibm.com/manyeyes/visualizations/afc4d...
Fresh House | Visualization Project
Project : L.A Apartment
Co-op with the company in Norway
Visualized by Fresh House
WolfVision Visualizer presentation, and collaboration solutions are used in universities, businesses, and other organizations worldwide. www.wolfvision.com
Key English-language terms sought out on IMDB by movie web-surfers within various nations. Could that possibly be true?
Exploring one million manga images on 287 megapixel HIPerSpace on supervisualization system at Calit2, San Diego.
This photo: Jeremy Douglass (Post-doctoral researcher, Software Studies Initiative) and Florian Wiencek (Jacobs-University, Bremen)
Personas is a component of the Metropath(ologies) exhibit, currently on display at the MIT Museum by the Sociable Media Group from the MIT Media Lab.
"Personas demonstrates the computer's uncanny insights and its inadvertent errors, such as the mischaracterizations caused by the inability to separate data from multiple owners of the same name."
Here (view large), the Personas tool processes 15 pages of web search results for the term "Ryan Ozawa" to provide this visualization of a personal profile. There is at least one other Ryan Ozawa out there, but I'd guess that 97 percent of the data used relates to me.
FISH, FLAMENCO, FOREST GUARD, FIRE - sent to my group www.flickr.com/groups/abc-visualized - supporting a big project 1. the offering, 2. Ortega y Gasset, 3. Italians, 4. b3053_3_1_2: Winter Comfort
Fresh House | Visualization Project
Project : L.A Apartment
Co-op with the company in Norway
Visualized by Fresh House
Fresh House | Visualization Project
Project : L.A Apartment
Co-op with the company in Norway
Visualized by Fresh House
Edited Hubble Space Telescope illustration/visualization of the progenitor star for SN 2017ein. This is only an illustration but shows what a huge star (compared to our sun) would look like before it exploded as a supernova. Color/processing variant.
Image source: hubblesite.org/news_release/news/2018-47
Original caption: Astronomers may have finally uncovered the long-sought progenitor to a specific type of exploding star by sifting through NASA Hubble Space Telescope archival data. The supernova, called a Type Ic, is thought to detonate after its massive star has shed or been stripped of its outer layers of hydrogen and helium.
These stars could be among the most massive known — at least 30 times heftier than our Sun. Even after shedding some of their material late in life, they are expected to be big and bright. So it was a mystery why astronomers had not been able to nab one of these stars in pre-explosion images.
Finally, in 2017, astronomers got lucky. A nearby star ended its life as a Type Ic supernova. Two teams of astronomers pored through the archive of Hubble images to uncover the putative precursor star in pre-explosion photos taken in 2007. The supernova, catalogued as SN 2017ein, appeared near the center of the nearby spiral galaxy NGC 3938, located roughly 65 million light-years away.
This potential discovery could yield insight into stellar evolution, including how the masses of stars are distributed when they are born in batches.
"Finding a bona fide progenitor of a supernova Ic is a big prize of progenitor searching," said Schuyler Van Dyk of the California Institute of Technology (Caltech) in Pasadena, lead researcher of one of the teams. "We now have for the first time a clearly detected candidate object." His team's paper was published in June in The Astrophysical Journal.
A paper by a second team, which appeared in the Oct. 21, 2018, issue of the Monthly Notices of the Royal Astronomical Society, is consistent with the earlier team's conclusions.
"We were fortunate that the supernova was nearby and very bright, about 5 to 10 times brighter than other Type Ic supernovas, which may have made the progenitor easier to find," said Charles Kilpatrick of the University of California, Santa Cruz, leader of the second team. "Astronomers have observed many Type Ic supernovas, but they are all too far away for Hubble to resolve. You need one of these massive, bright stars in a nearby galaxy to go off. It looks like most Type Ic supernovas are less massive and therefore less bright, and that's the reason we haven't been able to find them."
An analysis of the object's colors shows that it is blue and extremely hot. Based on that assessment, both teams suggest two possibilities for the source's identity. The progenitor could be a single hefty star between 45 and 55 times more massive than our Sun. Another idea is that it could have been a massive binary-star system in which one of the stars weighs between 60 and 80 solar masses and the other roughly 48 suns. In this latter scenario, the stars are orbiting closely and interact with each other. The more massive star is stripped of its hydrogen and helium layers by the close companion, and eventually explodes as a supernova.
The possibility of a massive double-star system is a surprise. "This is not what we would expect from current models, which call for lower-mass interacting binary progenitor systems," Van Dyk said.
Expectations on the identity of the progenitors of Type Ic supernovas have been a puzzle. Astronomers have known that the supernovas were deficient in hydrogen and helium, and initially proposed that some hefty stars shed this material in a strong wind (a stream of charged particles) before they exploded. When they didn't find the progenitors stars, which should have been extremely massive and bright, they suggested a second method to produce the exploding stars that involves a pair of close-orbiting, lower-mass binary stars. In this scenario, the heftier star is stripped of its hydrogen and helium by its companion. But the "stripped" star is still massive enough to eventually explode as a Type Ic supernova.
"Disentangling these two scenarios for producing Type Ic supernovas impacts our understanding of stellar evolution and star formation, including how the masses of stars are distributed when they are born, and how many stars form in interacting binary systems," explained Ori Fox of the Space Telescope Science Institute (STScI) in Baltimore, Maryland, a member of Van Dyk's team. "And those are questions that not just astronomers studying supernovas want to know, but all astronomers are after."
Type Ic supernovas are just one class of exploding star. They account for about 20 percent of massive stars that explode from the collapse of their cores.
The teams caution that they won't be able to confirm the source's identity until the supernova fades in about two years. The astronomers hope to use either Hubble or the upcoming NASA James Webb Space Telescope to see whether the candidate progenitor star has disappeared or has significantly dimmed. They also will be able to separate the supernova's light from that of stars in its environment to calculate a more accurate measurement of the object's brightness and mass.
SN 2017ein was discovered in May 2017 by Tenagra Observatories in Arizona. But it took the sharp resolution of Hubble to pinpoint the exact location of the possible source. Van Dyk's team imaged the young supernova in June 2017 with Hubble's Wide Field Camera 3. The astronomers used that image to pinpoint the candidate progenitor star nestled in one of the host galaxy's spiral arms in archival Hubble photos taken in December 2007 by the Wide Field Planetary Camera 2.
Kilpatrick's group also observed the supernova in June 2017 in infrared images from one of the 10-meter telescopes at the W. M. Keck Observatory in Hawaii. The team then analyzed the same archival Hubble photos as Van Dyk's team to uncover the possible source.
The Hubble Space Telescope is a project of international cooperation between NASA and ESA (European Space Agency). NASA's Goddard Space Flight Center in Greenbelt, Maryland, manages the telescope. The Space Telescope Science Institute (STScI) in Baltimore, Maryland, conducts Hubble science operations. STScI is operated for NASA by the Association of Universities for Research in Astronomy in Washington, D.C.