Astronomers using the James Webb and Subaru telescopes have discovered similarities between the recently discovered JWST-ERO galaxy and the previously known active dust galaxy BluDOG. These, along with the Active Hot Dog Galaxy (HotDOG), are thought to represent different stages in the process of merging two large galaxies with supermassive black holes. This article was published in “The Astrophysical Journal Letters”.
One of James Webb’s discoveries in space was the JWST-ERO object (Extreme Red Object). It is a compact system with a very red color in the optical and near-infrared regions and a blue color in the ultraviolet region, and 5-9. Use a single population of galaxies and quasars to describe their properties. It’s difficult. His two-component model, which takes into account the properties of dusty galaxies, light galaxies, and quasars, as well as active nuclei, is more suitable.
One of James Webb’s discoveries in space was the JWST-ERO object (Extreme Red Object). It is a compact system with a very red color in the optical and near-infrared regions and a blue color in the ultraviolet region, and 5-9. Use a single population of galaxies and quasars to describe their properties. It’s difficult. His two-component model, which takes into account the properties of dusty galaxies, light galaxies, and quasars, as well as active nuclei, is more suitable.
BluDOG is a system observed at redshifts z=2 to 3. These are a type of active galaxy called a dusty galaxy (DOG), which is surrounded by dusty star formation and a dusty torus following a massive merger event of gas-rich galaxies. It is in a transitional stage between the active nucleus and the BluDOG is characterized by the fact that it contains an excess of blue light within its optical range. The researchers note that the spectral energy distributions of BluDOG and JWST-ERO are very similar. The mass of the supermassive black hole in the BluDOG core is 108-109 solar masses, an order of magnitude larger than the mass of some of his JWST-EROs.
This merger causes intense star formation that is largely hidden by the dust-covered interstellar medium, and the influx of gas into the black hole triggers an explosion of activity in the core that is still hidden by dust. . Increased black hole activity causes some of the dust to escape, allowing an excess of blue light to appear. Eventually, much of the dust moves away from the core and now appears as an uncovered quasar.
source: https://iopscience.iop.org/article/10.3847/2041-8213/ad0e00