activity
19952026
most citedCold, clumpy accretion onto an active supermassive black hole

182 citations · 625 across the 22 of their papers we have counts for

collaborators

21 papers

astro-ph.GA2026

SMA Observations of the Archetypal Compact Steep-spectrum Radio Source 3C 303.1

Rushikesh Bhutkar, Mark Gurwell, Christopher O'Dea +5

AGN (active galactic nuclei) feedback plays a crucial role in shaping galaxy evolution. Numerical simulations show that the kinetic energy transfer efficiency from radio jets to in…

astro-ph.GA2025

A Deep Chandra View of Abell 2597: Bubbles, Shocks, Cold Fueling, and a Plasma Depletion Layer

Osase Omoruyi, Grant Tremblay, Stefi A. Baum +14

To examine how AGN feedback shapes the intracluster medium (ICM) and fuels black hole accretion in the cool-core galaxy cluster Abell 2597, we present deep (600 ks) Chandra X…

astro-ph.GA2025

What drives kpc-scale outflows in Radio-Quiet AGN? Insights from a Polarimetric Study

Salmoli Ghosh, Preeti Kharb, Biny Sebastian +5

We present a review of our findings on the origin, drivers, nature, and impact of kiloparsec-scale radio emission in radio-quiet (RQ) AGN. Using radio polarimetric techniques, we p…

astro-ph.GA2025

Mapping feedback signatures in 3C 297: A quasar-host merger at Cosmic Noon

Chetna Duggal, Christopher P. O'Dea, Stefi A. Baum +6

We present a study of quasar host galaxy 3C 297 which is home to a powerful bent-jet radio source suggesting vigorous interaction with a dense ISM and/or jet precession. Archival H…

astro-ph.GA2025★ 1 cited

A Comprehensive Multiwavelength Study of the OH Megamaser galaxy IRAS 09320+6134

Claudia M. Cassanta, Rogemar A. Riffel, Andrew Robinson +7

We present a multiwavelength study of the gas distribution, kinematics and excitation of the OH megamaser galaxy IRAS 09320+6134 (UGC 5101) using Gemini Multi-Object Spectrograph I…

astro-ph.GA2025★ 4 cited

Jet-mode feedback in NGC 5972: insights from resolved MUSE, GMRT and VLA observations

Arshi Ali, Biny Sebastian, Darshan Kakkad +10

NGC 5972, a Voorwerp galaxy, features a helical-shaped extended emission-line region (EELR) with a radius > 10 kpc and a S-shaped radio structure spanning about 470 kpc. We use VLT…

astro-ph.GA2025

The JWST View of Cygnus A: Jet-Driven Coronal Outflow with a Twist

Patrick M. Ogle, B. Sebastian, A. Aravindan +29

We present first results from James Webb Space Telescope (JWST) Near-Infrared Spectrograph (NIRSpec), Mid-Infrared Instrument (MIRI), and Keck Cosmic Webb Imager (KCWI) integral fi…

astro-ph.GA2025

Magnetic Field Structures In and Around Seyfert Galaxy Outflows

Salmoli Ghosh, P. Kharb, B. Sebastian +5

We present radio polarimetric images of 12 Seyfert and Low-Ionization Nuclear Emission-line Region (LINER) galaxies belonging to the Centre for Astrophysics (CfA)+12 micron sample…

astro-ph.HE2024★ 1 cited

PKS 2131-021 -- Discovery of Strong Coherent Sinusoidal Variations from Radio to Optical Frequencies: Compelling Evidence for a Blazar Supermassive Black Hole Binary

S. Kiehlmann, P. V. de la Parra, A. G. Sullivan +31

Haystack and Owens Valley Radio Observatory (OVRO) observations recently revealed strong, intermittent, sinusoidal total flux-density variations that maintained coherence between 1…

astro-ph.IM2019★ 11 cited

The Next Generation Very Large Array

James Di Francesco, Dean Chalmers, Nolan Denman +17

The next generation Very Large Array (ngVLA) is a transformational radio observatory being designed by the U.S. National Radio Astronomy Observatory (NRAO). It will provide order o…

astro-ph.GA2019★ 10 cited

Gemini IFU, VLA, and HST observation of the OH Megamaser Galaxy IRAS17526+3253

Dinalva A. Sales, A. Robinson, R. A. Riffel +7

We present a multiwavelength study of the OH megamaser galaxy (OHMG) IRAS17526+3253, based on new Gemini Multi-Object Spectrograph Integral Field Unit (GMOS/IFU) observations, Hubb…

astro-ph.GA2018★ 1 cited

The Close AGN Reference Survey (CARS): SOFIA detects spatially-resolved [CII] emission in the luminous AGN HE0433-1028

G. Busch, B. Husemann, I. Smirnova-Pinchukova +18

We report spatially-resolved [CII] m observations of HE 0433-1028, which is the first detection of a nearby luminous AGN (redshift 0.0355) with FIFI-LS onboard the airborn…

astro-ph.GA2018★ 12 cited

Star formation and gas inflows in the OH Megamaser galaxy IRAS03056+2034

C. Hekatelyne, Rogemar A. Riffel, Dinalva Sales +6

We have obtained observations of the OH Megamaser galaxy IRAS03056+0234 using Gemini Multi-Object Spectrograph (GMOS) Integral Field Unit (IFU), Very Large Array (VLA) and Hubble S…

astro-ph.GA2016★ 51 cited

The puzzling case of the radio-loud QSO 3C 186: a gravitational wave recoiling black hole in a young radio source?

M. Chiaberge, J. C. Ely, E. T. Meyer +14

Context. Radio-loud AGNs with powerful relativistic jets are thought to be associated with rapidly spinning black holes (BHs). BH spin-up may result from a number of processes, inc…

astro-ph.HE2016★ 64 cited

The Chandra Survey of Extragalactic Sources in the 3CR Catalog: X-ray Emission from Nuclei, Jets, and Hotspots in the Chandra Archival Observations

F. Massaro, D. E. Harris, E. Liuzzo +8

As part of our program to build a complete radio and X-ray database of all the 3CR extragalactic radio sources, we present an analysis of 93 sources for which Chandra archival data…

astro-ph.GA2016★ 182 cited

Cold, clumpy accretion onto an active supermassive black hole

Grant R. Tremblay, J. B. Raymond Oonk, Françoise Combes +22

Supermassive black holes in galaxy centres can grow by the accretion of gas, liberating energy that might regulate star formation on galaxy-wide scales. The nature of the gaseous f…

astro-ph.GA2014★ 25 cited

An embedded active nucleus in the OH megamaser galaxy IRAS16399-0937

Dinalva A. Sales, A. Robinson, D. J. Axon +7

We present a multiwavelength study of the OH Megamaser galaxy (OHMG) IRAS16399-0937, based on new HST/ACS F814W and H+[NII] images and archive data from HST, 2MASS, Spitzer, Her…

astro-ph.CO2010★ 49 cited

The 1.6 micron near infrared nuclei of 3C radio galaxies: Jets, thermal emission or scattered light?

R. D. Baldi, M. Chiaberge, A. Capetti +6

Using HST NICMOS 2 observations we have measured 1.6-micron near infrared nuclear luminosities of 100 3CR radio galaxies with z<0.3, by modeling and subtracting the extended emissi…

astro-ph.CO2009★ 27 cited

A Multiwavelength Spectral and Polarimetric Study of the Jet of 3C 264

Eric S. Perlman, C. Alex Padgett, Markos Georganopoulos +12

We present a comprehensive multiband spectral and polarimetric study of the jet of 3C 264 (NGC 3862). Included in this study are three HST optical and ultraviolet polarimetry data…

astro-ph1996★ 104 cited

Large-Scale Outflows in Edge-On Seyfert Galaxies. II. Kiloparsec-scale Radio Continuum Emission

E. J. M. Colbert, S. A. Baum, J. F. Gallimore +2

We present deep images of the kpc-scale radio continuum emission in 14 edge-on galaxies (ten Seyfert and four starburst galaxies). Observations were taken with the VLA at 4.9~GHz (…

astro-ph1995★ 73 cited

Large-Scale Outflows in Edge-on Seyfert Galaxies. I. Optical Emission- Line Imaging and Optical Spectroscopy

Edward J. M. Colbert, S. A. Baum, J. F. Gallimore +5

We have launched a search for large-scale ($\gapprox$1 kpc) minor-axis outflows in edge-on Seyfert galaxies in order to assess their frequency of occurrence and study their propert…