Hubble Jams With A Cosmic Guitar
Arp 105 is a dazzling ongoing merger between an elliptical galaxy and a spiral galaxy drawn together by gravity, characterized by a long, drawn out tidal tail of stars and gas more than 362,000 light-years long. The immense tail, which extends beyond this image from NASA’s Hubble Space Telescope, was pulled from the two galaxies by their gravitational interactions and is embedded with star clusters and dwarf galaxies. The distinctively shaped arrangement of galaxies and tail gives the grouping its nickname: The Guitar.
The gravitational dance between elliptical galaxy NGC 3561B and spiral galaxy NGC 3561A creates a wealth of fascinating colliding galaxy features. A long lane of dark dust emerging from the elliptical galaxy ends in, and may be feeding, a bright blue area of star formation on the base of the guitar known as Ambartsumian’s Knot. Ambartsumian’s Knot is a tidal dwarf galaxy, a type of star-forming system that develops from the debris in tidal arms of interacting galaxies.
Two more bright blue areas of star formation are obvious in the Hubble image at the edges of the distorted spiral galaxy. The region to the left in the spiral galaxy is likely very similar to Ambartsumian’s Knot, a knot of intense star formation triggered by the merger. The region to the right is still under investigation - it could be part of the collision, but its velocity and spectral data (indicating distance) are different from the rest of the system, so it may be a foreground galaxy.
Thin, faint tendrils of gas and dust are just barely visible stretching between and connecting the two galaxies. These tendrils are particularly interesting to astronomers since they may help define the timescale of the evolution of this collision.
Credit: NASA, ESA and M. West (Lowell Observatory); Processing: Gladys Kober (NASA/Catholic University of America)
#NASAMarshall #NASA #NASAHubble #Hubble #NASAGoddard #galaxy #SpiralGalaxy
Read more about NASA’s Hubble Space Telescope
Hubble Jams With A Cosmic Guitar
Arp 105 is a dazzling ongoing merger between an elliptical galaxy and a spiral galaxy drawn together by gravity, characterized by a long, drawn out tidal tail of stars and gas more than 362,000 light-years long. The immense tail, which extends beyond this image from NASA’s Hubble Space Telescope, was pulled from the two galaxies by their gravitational interactions and is embedded with star clusters and dwarf galaxies. The distinctively shaped arrangement of galaxies and tail gives the grouping its nickname: The Guitar.
The gravitational dance between elliptical galaxy NGC 3561B and spiral galaxy NGC 3561A creates a wealth of fascinating colliding galaxy features. A long lane of dark dust emerging from the elliptical galaxy ends in, and may be feeding, a bright blue area of star formation on the base of the guitar known as Ambartsumian’s Knot. Ambartsumian’s Knot is a tidal dwarf galaxy, a type of star-forming system that develops from the debris in tidal arms of interacting galaxies.
Two more bright blue areas of star formation are obvious in the Hubble image at the edges of the distorted spiral galaxy. The region to the left in the spiral galaxy is likely very similar to Ambartsumian’s Knot, a knot of intense star formation triggered by the merger. The region to the right is still under investigation - it could be part of the collision, but its velocity and spectral data (indicating distance) are different from the rest of the system, so it may be a foreground galaxy.
Thin, faint tendrils of gas and dust are just barely visible stretching between and connecting the two galaxies. These tendrils are particularly interesting to astronomers since they may help define the timescale of the evolution of this collision.
Credit: NASA, ESA and M. West (Lowell Observatory); Processing: Gladys Kober (NASA/Catholic University of America)
#NASAMarshall #NASA #NASAHubble #Hubble #NASAGoddard #galaxy #SpiralGalaxy
Read more about NASA’s Hubble Space Telescope