Massive galaxies host super-massive black holes at their centers. During periods of intense gas accretion onto the latter, the luminosity of their accretion disks can exceed that of the stellar emission of the galaxy, leading to objects we call quasars. In this talk I will focus on a family of hyper-luminous, obscured quasars identified by the WISE mission referred to as Hot Dust Obscured Galaxies or Hot DOGs. With luminosities that can exceed 10^14 Lsun, these are some of the most luminous objects in the Universe, yet they are only easily identifiable at mid-IR wavelengths due to their almost Compton-thick obscuration. Their luminosities and high-Eddington ratios make them interesting candidates in which to observe the effects of this energy release onto their host galaxies, usually referred to as quasar-mode feedback. I will review what we know about this population through studies across the electromagnetic spectrum. I will discuss recent results about their large-scale environments from broad-band photometry that show these objects reside in large overdensities, and will zoom-in down to their core using ~400pc resolution ALMA observations of the [CII] emission line in the most luminous Hot DOG, at z=4.6. These observations approach the size of the sphere of influence of the SMBH and show evidence for powerful nuclear outflows. I will also highlight results on a sub-population of Hot DOGs that show excess blue emission. This excess can be attributed to scattered light from the highly obscured central engine, and I will present exciting results from recent polarimetric imaging of these sources.
https://tum-conf.zoom-x.de/j/65191706029?pwd=71EqMpef1xmKnGpcNvH23bKeK79AE1.1
Meeting ID: 651 9170 6029
Passcode: 750488
The talk will be followed by a meetup with PhDs and Postdocs of the Cluster over lunch.
