An international research team including Yoshiki Hatori, a researcher at Ehime University, Professor Michael Strauss at Princeton University, and Kentaro Aoki, Senior Support Astronomer at the National Astronomical Observatory of Japan, has newly added 48 from observation data obtained by the Subaru Telescope installed in Hawaii. I found a galaxy called DOG.It is believed that there is a supermassive black hole in the center of the galaxy, which provides an important clue to the evolution of the galaxy and black hole.
When and how galaxies were formed and grew is one of the most important themes of modern astronomy.Recent studies have revealed that there is a supermassive black hole in the center of the galaxy, which has a mass of 10 to 10 billion times that of the Sun, and that the mass of the entire galaxy and the mass of the black hole are closely related. I am.This suggests that galaxies and black holes may be growing while influencing each other.Some galaxies are called DOG (Dust Obscured Galaxy) and are covered with dust, which has been difficult to observe until now. DOGs are considered to be growing galaxies, and we can expect to get clues as to how the interaction between galaxies and black holes affects each other's growth.
The ultra-wide-field camera (HSC) mounted on the Subaru Telescope in 2012 was used for DOG observations.It can shoot the size of 9 full moons at a time and has high sensitivity.The research team searched for DOG from this HSC observation data.As a result, we succeeded in discovering 48 new DOGs.
In the future, we plan to investigate in detail the nature of the black hole lurking in the center by using other observations such as the method of using X-rays for these DOGs.In addition, the observation results obtained this time and the data obtained in the future are expected to be clues to various mysteries of the universe that have not yet been elucidated other than the evolution of the galaxy.