86 citations · 453 across the 33 of their papers we have counts for
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A New Sample of Closely Separated Dual and Binary AGN Candidates Revealed with the Radio Fundamental Catalog
Emma Schwartzman, Ryan Pfeifle, Tracy Clarke +3
The Big Multi-AGN Catalog (BigMAC) provides the first literature-complete compilation of confirmed and candidate dual, binary, and recoiling active galactic nuclei (AGN). The BigMA…
Two Peas in a Pod: The First Confirmed Dual Active Galactic Nucleus within a Green Pea Galaxy System
Konstantinos Kouroumpatzakis, Peter G. Boorman, Jiří Svoboda +5
The growth of galaxies in the early Universe is thought to be dominated by compact, intensely star-forming systems, yet the corresponding growth of supermassive black holes (SMBHs)…
The Hunt for Red Dual AGNs I: Spatially-Resolved Mid-IR Dual AGNs in the DeCam Legacy Survey
Ryan W. Pfeifle, Kimberly A. Weaver, Barry Rothberg +13
Theoretical studies predict that dual AGNs are a critical stage of galaxy merger-driven supermassive black hole growth. Systematic searches for dual AGNs typically target late-stag…
A High Resolution Search for Dual AGN Candidates in Mergers: A Pre-Selection Strategy using Keck AO
Camilo Vazquez, S. Satyapal, G. Canalizo +20
Accreting supermassive black holes (SMBHs) in galaxy mergers with separations 1 kpc are crucial to our understanding of SMBH growth, galaxy evolution, and SMBH binary evolution…
Varstrometry for Dual AGN using Radio interferometry: VaDAR with the VLBA
Emma Schwartzman, Paula Fudolig, Tracy Clarke +6
Multiple active galactic nuclei (multi-AGN) are a known result of galaxy mergers. Therefore, they are an important tool for studying the formation and dynamical evolution of galaxi…
Super-Size Me: The Big Multi-AGN Catalog (The Big MAC), Data Release 1: The Source Catalog
Ryan W. Pfeifle, Kimberly A. Weaver, Nathan J. Secrest +2
Galaxy mergers represent the most transformative and dramatic avenue for galaxy and supermassive black hole (SMBH) evolution. Multi-active galactic nuclei (multi-AGNs) are expected…
Kpc-Scale Neutral Iron K Emission in the Starburst-AGN NGC 4945: a Relic AGN Outflow?
Kimberly A. Weaver, Jenna M. Cann, Lynne Valencic +8
NGC 4945 contains a well-known heavily obscured active galactic nucleus (AGN) at its core, with prior reports of strong nuclear and off-nuclear neutral Fe K emission due to the…
Exploring X-ray Properties of Low Metallicity Dwarf Galaxies
Jenna M. Cann, Kimberly A. Weaver, Ryan W. Pfeifle +3
One of the primary outstanding questions in extragalactic astronomy is the formation and early evolution of the supermassive black holes that are seen in nearly every massive galax…
BASS XXXIV: A Catalog of the Nuclear Mm-wave Continuum Emission Properties of AGNs Constrained on Scales 100--200 pc
Taiki Kawamuro, Claudio Ricci, Richard F. Mushotzky +25
We present a catalog of the millimeter-wave (mm-wave) continuum properties of 98 nearby ( 0.05) active galactic nuclei (AGNs) selected from the 70-month Swift/BAT hard X-ray c…
NuSTAR Observations of Four Mid-IR Selected Dual AGN Candidates in Galaxy Mergers
Ryan W. Pfeifle, Kimberly Weaver, Shobita Satyapal +5
Mergers of galaxies are a ubiquitous phenomenon in the Universe and represent a natural consequence of the ``bottom-up'' mass accumulation and galaxy evolution cosmological paradig…
VaDAR: Varstrometry for Dual AGN using Radio interferometry
Emma Schwartzman, Tracy E. Clarke, Kristina Nyland +5
Binary and dual active galactic nuclei (AGN) are an important observational tool for studying the formation and dynamical evolution of galaxies and supermassive black holes (SMBHs)…
The Messy Nature of Fiber Spectra: Star-Quasar Pairs Masquerading as Dual Type 1 AGNs
Ryan W. Pfeifle, Barry Rothberg, Kimberly A. Weaver +5
Theoretical studies predict that the most significant growth of supermassive black holes occurs in late-stage mergers, coinciding with the manifestation of dual active galactic nuc…
NuSTAR Observes Two Bulgeless Galaxies: No Hard X-ray AGN Detected in NGC 4178 or J0851+3926
Ryan W. Pfeifle, Shobita Satyapal, Claudio Ricci +5
The discovery over the last several decades of moderate luminosity AGNs in disk-dominated galaxies - which show no "classical" bulges - suggests that secular mechanisms represent a…
Nuclear Activity in the Low Metallicity Dwarf Galaxy SDSS J0944-0038: A Glimpse into the Primordial Universe
Michael Reefe, Shobita Satyapal, Remington O. Sexton +11
Local low metallicity dwarf galaxies are relics of the early universe and hold clues into the origins of supermassive black holes (SMBHs). In recent work, coronal lines have been u…
BASS XXXII: Studying the Nuclear Mm-wave Continuum Emission of AGNs with ALMA at Scales 100-200 pc
Taiki Kawamuro, Claudio Ricci, Masatoshi Imanishi +25
To understand the origin of nuclear ( 100 pc) millimeter-wave (mm-wave) continuum emission in active galactic nuclei (AGNs), we systematically analyzed sub-arcsec resolut…
BAT AGN Spectroscopic Survey XXI: The Data Release 2 Overview
Michael J. Koss, Benny Trakhtenbrot, Claudio Ricci +24
The BAT AGN Spectroscopic Survey (BASS) is designed to provide a highly complete census of the key physical parameters of supermassive black holes (SMBHs) that power local active g…
A hard X-ray view of Luminous and Ultra-luminous Infrared Galaxies in GOALS: I - AGN obscuration along the merger sequence
C. Ricci, G. C. Privon, R. W. Pfeifle +25
The merger of two or more galaxies can enhance the inflow of material from galactic scales into the close environments of Active Galactic Nuclei (AGN), obscuring and feeding the su…
BAT AGN Spectroscopic Survey-XXIII. A New Mid-Infrared Diagnostic for Absorption in Active Galactic Nuclei
Ryan W. Pfeifle, Claudio Ricci, Peter G. Boorman +15
In this study, we use the SWIFT/BAT AGN sample, which has received extensive multiwavelength follow-up analysis as a result of the BAT AGN Spectroscopic Survey (BASS), to develop a…
The Discovery of a Hidden Broad Line AGN in a Bulgeless Galaxy: Keck NIR Spectroscopic Observations of SDSS J085153.64+392611.76
Thomas Bohn, Gabriela Canalizo, Shobita Satyapal +1
We report the discovery of a buried, active supermassive black hole in SDSS J085153.64+392611.76, a bulgeless Seyfert 2 (Sy2) galaxy. Keck near-infrared observations reveal a hidde…
Multi-wavelength observations of SDSS J105621.45+313822.1, a broad-line, low-metallicity AGN
Jenna M. Cann, Shobita Satyapal, Thomas Bohn +8
In contrast to massive galaxies with Solar or super-Solar gas phase metallicities, very few Active Galactic Nuclei (AGN) are found in low-metallicity dwarf galaxies. Such a populat…
Very long baseline interferometry observation of the triple AGN candidate J0849+1114
Krisztina Éva Gabányi, Sándor Frey, Shobita Satyapal +2
In the hierarchical structure formation model, galaxies grow through various merging events. Numerical simulations indicate that the mergers can enhance the activity of the central…
A Triple AGN in a Mid-Infrared Selected Late Stage Galaxy Merger
Ryan W. Pfeifle, Shobita Satyapal, Christina Manzano-King +11
The co-evolution of galaxies and the supermassive black holes (SMBHs) at their centers via hierarchical galaxy mergers is a key prediction of CDM cosmology. As gas and dust are…
Buried Black Hole Growth in IR-selected Mergers: New Results from Chandra
Ryan W. Pfeifle, Shobita Satyapal, Nathan J. Secrest +8
Observations and theoretical simulations suggest that a significant fraction of merger-triggered accretion onto supermassive black holes is highly obscured, particularly in late-st…