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Joint NuSTAR and Chandra analysis of the obscured quasar in IC 2497 - Hanny's Voorwerp system
Lia F. Sartori, Kevin Schawinski, Michael J. Koss +9
We present new Nuclear Spectroscopic Telescope Array (NuSTAR) observations of the core of IC 2497, the galaxy associated with Hanny's Voorwerp. The combined fits of the Chandra (0.…
AGN photoionization of gas in companion galaxies as a probe of AGN radiation in time and direction
William C. Keel, Vardha N. Bennert, Anna Pancoast +9
We consider AGN photoionization of gas in companion galaxies (cross-ionization) as a way to sample the intensity of AGN radiation in both direction and time, independent of the gas…
BAT AGN Spectroscopic Survey--VIII. Type 1 AGN With Massive Absorbing Columns
T. Taro Shimizu, Richard I. Davies, Michael Koss +12
We explore the relationship between X-ray absorption and optical obscuration within the BAT AGN Spectroscopic Survey (BASS) which has been collecting and analyzing the optical and…
LLAMA: Normal star formation efficiencies of molecular gas in the centres of luminous Seyfert galaxies
D. J. Rosario, L. Burtscher, R. I. Davies +23
Using new APEX and JCMT spectroscopy of the CO 2-1 line, we undertake a controlled study of cold molecular gas in moderately luminous Active Galactic Nuclei (AGN) and inactive gala…
Galaxy Zoo: Secular evolution of barred galaxies from structural decomposition of multi-band images
Sandor J. Kruk, Chris J. Lintott, Steven P. Bamford +9
We present the results of two-component (disc+bar) and three-component (disc+bar+bulge) multiwavelength 2D photometric decompositions of barred galaxies in five SDSS bands (…
The close environments of accreting massive black holes are shaped by radiative feedback
Claudio Ricci, Benny Trakhtenbrot, Michael J. Koss +13
The large majority of the accreting supermassive black holes in the Universe are obscured by large columns of gas and dust. The location and evolution of this obscuring material ha…