THE CLUSTER AND FIELD GALAXY ACTIVE GALACTIC NUCLEUS FRACTION AT by Martini, Paul, Brodwin, M., Stanford, S. A., Gonzalez, Anthony H., Bautz, Marshall W., Hickox, R. C., Stern, D., Eisenhardt, P. R., Galametz, A., Norman, D., Jannuzi, Buell T., Dey, A., Murray, S., Jones, C., Brown, M. J. I., Miller, Eric D

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The Destruction and Recreation of the X-Ray Corona in a Changing-look Active Galactic Nucleus by Ricci, C, Kara, E, Loewenstein, M, Trakhtenbrot, B, Arcavi, I, Remillard, R, Fabian, AC, Gendreau, KC, Arzoumanian, Z, Li, R, Ho, LC, MacLeod, CL, Cackett, E, Altamirano, D, Gandhi, P, Kosec, P, Pasham, D, Steiner, J, Chan, CH

“…We present the drastic transformation of the X-ray properties of the active galactic nucleus (AGN) 1ES 1927+654, following a changing-look event. …”
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The Destruction and Recreation of the X-Ray Corona in a Changing-look Active Galactic Nucleus by Ricci, C, Kara, Erin A, Loewenstein, M, Trakhtenbrot, B, Arcavi, I, Remillard, Ronald Alan, Fabian, AC, Gendreau, KC, Arzoumanian, Z, Li, R, Ho, LC, MacLeod, CL, Cackett, E, Altamirano, D, Gandhi, P, Kosec, P, Pasham, Dheeraj Ranga Reddy, Steiner, James F, Chan, CH

“…We present the drastic transformation of the X-ray properties of the active galactic nucleus (AGN) 1ES 1927+654, following a changing-look event. …”
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A DISTINCTIVE DISK-JET COUPLING IN THE SEYFERT-1 ACTIVE GALACTIC NUCLEUS NGC 4051 by King, A. L., Miller, J. M., Cackett, E. M., Fabian, Andrew C., Markoff, Sera B., Rupen, M., Reynolds, M. T., Nowak, Michael A., Gultekin, K.

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HST WFC3/IR OBSERVATIONS OF ACTIVE GALACTIC NUCLEUS HOST GALAXIES AT z ~ 2: SUPERMASSIVE BLACK HOLES GROW IN DISK GALAXIES by Schawinski, Kevin, Treister, Ezequiel, Urry, C. Megan, Cardamone, Carolin, Simmons, Brooke, Yi, Sukyoung K.

“…We present the rest-frame optical morphologies of active galactic nucleus (AGN) host galaxies at 1.5 < z < 3, using near-infrared imaging from the Hubble Space Telescope Wide Field Camera 3, the first such study of AGN host galaxies at these redshifts. …”
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Using H α Filaments to Probe Active Galactic Nuclei Feedback in Galaxy Clusters by Qiu, Yu, Bogdanović, Tamara, Li, Yuan, McDonald, Michael

“…Recent observations of giant ellipticals and brightest cluster galaxies (BCGs) provide tentative evidence for a correlation between the luminosity of the Hμ-emitting gas filaments and the strength of feedback associated with the active galactic nucleus (AGN). Motivated by this, we use 3D radiation-hydrodynamic simulations with the code Enzo to examine and quantify the relationship between the observable properties of the Hμ filaments and the kinetic and radiative feedback from supermassive black holes in BCGs. …”
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Multiwavelength follow-up of a rare IceCube neutrino multiplet

“…No likely electromagnetic counterpart was detected, and we discuss the implications of these constraints on candidate neutrino sources such as gamma-ray bursts, core-collapse supernovae and active galactic nucleus flares. This study illustrates the potential of and challenges for future follow-up campaigns.…”
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Using H α Filaments to Probe Active Galactic Nuclei Feedback in Galaxy Clusters by Qiu, Yu, Bogdanović, Tamara, Li, Yuan, McDonald, Michael A.

“…Recent observations of giant ellipticals and brightest cluster galaxies (BCGs) provide tentative evidence for a correlation between the luminosity of the Hμ-emitting gas filaments and the strength of feedback associated with the active galactic nucleus (AGN). Motivated by this, we use 3D radiation-hydrodynamic simulations with the code Enzo to examine and quantify the relationship between the observable properties of the Hμ filaments and the kinetic and radiative feedback from supermassive black holes in BCGs. …”
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AGN STORM 2. I. First results: A Change in the Weather of Mrk 817

“…<jats:title>Abstract</jats:title> <jats:p>We present the first results from the ongoing, intensive, multiwavelength monitoring program of the luminous Seyfert 1 galaxy Mrk 817. While this active galactic nucleus was, in part, selected for its historically unobscured nature, we discovered that the X-ray spectrum is highly absorbed, and there are new blueshifted, broad, and narrow UV absorption lines, which suggest that a dust-free, ionized obscurer located at the inner broad-line region partially covers the central source. …”
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Observing—and Imaging—Active Galactic Nuclei with the Event Horizon Telescope by Chael, Andrew A., Johnson, Michael D., Doeleman, Sheperd S., Blackburn, Lindy, Wardle, John F. C., Freeman, William T., the Event Horizon Telescope Collaboration, Fish, Vincent, Bouman, Katherine, Chael, Andrew, Johnson, Michael, Doeleman, Sheperd, Wardle, John, Event Horizon Telescope Collaboration, Fish, Vincent L., Akiyama, Kazunori, Bouman, Katherine L., Freeman, William T.

“…Originally developed to image the shadow region of the central black hole in Sagittarius A* and in the nearby galaxy M87, the Event Horizon Telescope (EHT) provides deep, very high angular resolution data on other active galactic nucleus (AGN) sources too. The challenges of working with EHT data have spurred the development of new image reconstruction algorithms. …”
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Search for High-energy Neutrinos from Ultraluminous Infrared Galaxies with IceCube by Conrad, Janet

“…These dusty objects are generally powered by starbursts with star formation rates that exceed 100 M⊙ yr−1, possibly combined with a contribution from an active galactic nucleus. Such environments make ULIRGs plausible sources of astrophysical high-energy neutrinos, which can be observed by the IceCube Neutrino Observatory at the South Pole. …”
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Multiwavelength follow-up of a rare IceCube neutrino multiplet by IceCube Collaboration, ASAS-SN, The Astrophysical Multimessenger Observatory Network, Fermi, HAWC Collaboration, LCO, MASTER, Swift, VERITAS, Arguelles Delgado, Carlos A, Axani, Spencer Nicholas, Collin, G. H., Conrad, Janet Marie, Jones, B.J.P., Moulai, Marjon H.

“…No likely electromagnetic counterpart was detected, and we discuss the implications of these constraints on candidate neutrino sources such as gamma-ray bursts, core-collapse supernovae and active galactic nucleus flares. This study illustrates the potential of and challenges for future follow-up campaigns.…”
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Simulating galaxy formation with black hole driven thermal and kinetic feedback by Weinberger, Rainer, Springel, Volker, Hernquist, Lars, Pillepich, Annalisa, Marinacci, Federico, Pakmor, Rüdiger, Nelson, Dylan, Genel, Shy, Vogelsberger, Mark, Naiman, Jill, Torrey, Paul

“…The inefficiency of star formation in massive elliptical galaxies is widely believed to be caused by the interactions of an active galactic nucleus (AGN) with the surrounding gas. Achieving a sufficiently rapid reddening of moderately massive galaxies without expelling too many baryons has however proven difficult for hydrodynamical simulations of galaxy formation, prompting us to explore a new model for the accretion and feedback effects of supermassive black holes. …”
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AGN STORM 2. I. First results: A Change in the Weather of Mrk 817 by Kara, Erin A

“…<jats:title>Abstract</jats:title> <jats:p>We present the first results from the ongoing, intensive, multiwavelength monitoring program of the luminous Seyfert 1 galaxy Mrk 817. While this active galactic nucleus was, in part, selected for its historically unobscured nature, we discovered that the X-ray spectrum is highly absorbed, and there are new blueshifted, broad, and narrow UV absorption lines, which suggest that a dust-free, ionized obscurer located at the inner broad-line region partially covers the central source. …”
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Space Telescope and Optical Reverberation Mapping Project. XII. Broad-line Region Modeling of NGC 5548

“…Finally, we compare the Hβ results to similar models of data obtained in 2008 when the active galactic nucleus was at a lower luminosity state. We find that the size of the emitting region increased during this time period, but the geometry and black hole mass remained unchanged, which confirms that the BLR kinematics suitably gauge the gravitational field of the central black hole.…”
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The formation of dusty cold gas filaments from galaxy cluster simulations by Qiu, Yu, Bogdanović, Tamara, Li, Yuan, McDonald, Michael, McNamara, Brian R

“…These findings have raised questions about the origin of the cold gas, as well as its relationship with the central active galactic nucleus (AGN), whose feedback has been established as a ubiquitous feature in such galaxy clusters3–5. …”
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PROBING THE PARSEC-SCALE ACCRETION FLOW OF 3C 84 WITH MILLIMETER WAVELENGTH POLARIMETRY by Plambeck, R. L., Bower, Geoffrey C., Rao, Ramprasad, Marrone, Daniel P., Jorstad, Svetlana G., Marscher, Alan P., Johnson, Michael D., Doeleman, Sheperd Samuel, Fish, Vincent L.

“…We report the discovery of Faraday rotation toward radio source 3C 84, the active galactic nucleus in NGC 1275 at the core of the Perseus Cluster. …”
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AN IONIZATION CONE IN THE DWARF STARBURST GALAXY NGC 5253 by Zastrow, Jordan, Oey, M. S., Veilleux, Sylvain, Martin, Crystal L., McDonald, Michael A.

“…Although less likely, we cannot rule out the possibility of an obscured active galactic nucleus source. An echelle spectrum along the minor axis shows complex kinematics that are consistent with outflow activity. …”
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INTERSTELLAR SCINTILLATION AND THE RADIO COUNTERPART OF THE FAST RADIO BURST FRB 150418 by Akiyama, Kazunori, Johnson, Michael D.

“…An alternative explanation, first suggested by Williams & Berger, is that the identified counterpart may instead be a compact active galactic nucleus (AGN). The putative counterpart's variation may then instead be extrinsic, caused by refractive scintillation in the ionized interstellar medium of the Milky Way, which would invalidate the association with FRB 150418. …”
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MAPPING THE GAS TURBULENCE IN THE COMA CLUSTER: PREDICTIONS FOR ASTRO-H by Markevitch, M., Zhuravleva, I., ZuHone, John A.

“…One of the best targets for turbulence studies is the Coma cluster, due to its proximity, absence of a cool core, and lack of a central active galactic nucleus. To determine what constraints Astro-H will be able to place on the Coma velocity field, we construct simulated maps of the projected gas velocity and compute the second-order structure function, an analog of the velocity power spectrum. …”
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