gjdonatiello
Andromeda (M31), Triangulum (M33) and Mirach ft NGC 404
Andromeda (M31), Triangulum (M33) and Mirach ft NGC 404
Credit: Giuseppe Donatiello
Andromeda, like the Milky Way, is a canonical galaxy and a laboratory for examining in detail many of the astrophysical processes that are studied in the more distant field. Studying Andromeda and Triangulum in the Local Group has the advantage of offering us a view free from the problems that plague galactic studies due to our location within the Milky Way, but their location within the Local Group allows us to resolve and study individual stars and infer population properties in incomparably greater detail than is possible in distant systems.
Andromeda is the closest giant spiral galaxy to our own and the only other giant galaxy in the Local Group.
If Andromeda is the twin of the Milky Way, the Triangulum Galaxy (M33), with a mass about 10 times less than either of these two giants, is their little sister. M33 is the third brightest galaxy in the Local Group and probably also a satellite of M31. The relatively undisturbed optical appearance of M33 places strong constraints on the past interaction of these two galaxies, although it should be noted that the gaseous component is highly deformed. To study the halos of both the Andromeda and Triangulum galaxies in more detail, astronomers performed a deep photometric survey. They detected a multitude of large-scale structures of low surface brightness, including several flows and new, rather faint dwarf galaxies.
Significant variations in stellar populations due to flow-like structures are detected in the inner halo. Some previously unseen structures are present in my ultradeep wide-field survey And450.
Andromeda (M31), Triangulum (M33) and Mirach ft NGC 404
Andromeda (M31), Triangulum (M33) and Mirach ft NGC 404
Credit: Giuseppe Donatiello
Andromeda, like the Milky Way, is a canonical galaxy and a laboratory for examining in detail many of the astrophysical processes that are studied in the more distant field. Studying Andromeda and Triangulum in the Local Group has the advantage of offering us a view free from the problems that plague galactic studies due to our location within the Milky Way, but their location within the Local Group allows us to resolve and study individual stars and infer population properties in incomparably greater detail than is possible in distant systems.
Andromeda is the closest giant spiral galaxy to our own and the only other giant galaxy in the Local Group.
If Andromeda is the twin of the Milky Way, the Triangulum Galaxy (M33), with a mass about 10 times less than either of these two giants, is their little sister. M33 is the third brightest galaxy in the Local Group and probably also a satellite of M31. The relatively undisturbed optical appearance of M33 places strong constraints on the past interaction of these two galaxies, although it should be noted that the gaseous component is highly deformed. To study the halos of both the Andromeda and Triangulum galaxies in more detail, astronomers performed a deep photometric survey. They detected a multitude of large-scale structures of low surface brightness, including several flows and new, rather faint dwarf galaxies.
Significant variations in stellar populations due to flow-like structures are detected in the inner halo. Some previously unseen structures are present in my ultradeep wide-field survey And450.