Publications (17)
Local Volume HI Survey: the far-infrared radio correlation
Li Shao, Baerbel Koribalski, Jing Wang +2
In this paper we measure the far-infrared (FIR) and radio flux densities of a sample of 82 local gas-rich galaxies, including 70 "dwarf" galaxies (), from the L…
The Spitzer Survey of Stellar Structure in Galaxies (S4G): Stellar Masses, Sizes and Radial Profiles for 2352 Nearby Galaxies
Juan Carlos Munoz-Mateos, Kartik Sheth, Michael Regan +25
The Spitzer Survey of Stellar Structure in Galaxies (S4G) is a volume, magnitude, and size-limited survey of 2352 nearby galaxies with deep imaging at 3.6 and 4.5um. In this paper…
ALMA gas-dynamical mass measurement of the supermassive black hole in the red nugget relic galaxy PGC 11179
Jonathan H. Cohn, Maeve Curliss, Jonelle L. Walsh +10
We present 0-resolution Atacama Large Millimeter/submillimeter Array (ALMA) observations of CO(21) emission from the circumnuclear gas disk in the red nu…
On the Origin of Ultraviolet Emission and the Accretion Model of Low-luminosity AGNs
Zhaolong Yu, Feng Yuan, Luis Ho
Low-luminosity active galactic nuclei (LLAGNs) are generally believed to be powered by an inner radiatively inefficient, advection-dominated accretion flow (ADAF), an outer truncat…
The Accretion Rates and Spectral Energy Distributions of BL Lacertae Objects
Jian-Min Wang, Ruediger Staubert, Luis Ho
We investigate the relationship between accretion rates and the spectral energy distributions (SEDs) of BL Lac objects, using a sample of objects for which published information on…
Candidate AGNs in Late-Type Galaxies
Louis-Benoit Desroches, Luis Ho
We have assembled a sample of 64 late-type spiral galaxies (T types 6.0-9.0, corresponding to Hubble types Scd-Sm) with archival Chandra data. At a signal-to-noise (S/N) threshold…
A Unified Origin of Faraday Rotation toward 3C 84: The Circumnuclear Ambient Medium within the Parsec-Scale Bondi Radius of the Host Galaxy NGC 1275
Minchul Kam, Jongho Park, Sascha Trippe +11
We present multi-frequency polarimetric observations of 3C 84 obtained with the Korean VLBI Network at 43-141 GHz, the Very Long Baseline Array at 43 GHz, and the High Sensitivity…
Deep Spectroscopy of the Host Galaxy of a Tidal Disruption Flare in A1795
W. Peter Maksym, Melville Ulmer, Kathy Roth +5
A likely tidal disruption of a star by the intermediate-mass black hole (IMBH) of a dwarf galaxy was recently identified in association with Abell 1795. Without deep spectroscopy f…
Astro2020 Science White Paper: Black Holes Across Cosmic Time
Kayhan Gültekin, Aaron Barth, Karl Gebhardt +8
Supermassive black holes are located at the center of most, if not all, massive galaxies. They follow close correlations with global properties of their host galaxies (scaling rela…
Thirty Meter Telescope International Observatory Detailed Science Case 2024
Warren Skidmore, Bob Kirshner, David Andersen +168
The Thirty Meter Telescope (TMT) International Observatory (TIO) will be a revolutionary leap forward in astronomical observing capabilities, enabling us to address some of the mos…
Mapping the Inner Structure of Quasars with Time-Domain Spectroscopy
Yue Shen, Scott Anderson, Edo Berger +40
The ubiquitous variability of quasars across a wide range of wavelengths and timescales encodes critical information about the structure and dynamics of the circumnuclear emitting…
A 20 Thousand Solar Mass Black Hole in the Stellar Cluster G1
Karl Gebhardt, R. Michael Rich, Luis Ho
We present the detection of a 2.0(+1.4,-0.8)x10^4 solar mass black hole (BH) in the stellar cluster G1 (Mayall II), based on data taken with the Space Telescope Imaging Spectrograp…
A close look at the dwarf AGN of NGC 4395: optical and near-IR integral field spectroscopy
Carine Brum, Marlon R. Diniz, Rogemar A. Riffel +7
Intermediate mass black holes (10-10 M) in the center of dwarf galaxies are believed to be analogous to growing Active Galactic Nuclei (AGN) in the early Universe.…
Low-Mass Active Galactic Nuclei with Rapid X-Ray Variability
Luis Ho, Minjin Kim
We present a detailed study of the optical spectroscopic properties of 12 active galactic nuclei (AGNs) with candidate low-mass black holes (BHs) selected by Kamizasa et al. throug…
The Black Hole Mass and Extreme Orbital Structure in NGC1399
Karl Gebhardt, Tod R. Lauer, Jason Pinkney +12
The largest galaxies, and in particular central galaxies in clusters, offer unique insight into understanding the mechanism for the growth of nuclear black holes. We present Hubble…
Black Hole Mass Estimates from Reverberation Mapping and from Spatially Resolved Kinematics
Karl Gebhardt, John Kormendy, Luis Ho +12
Black hole (BH) masses that have been measured by reverberation mapping in active galaxies fall significantly below the correlation between bulge luminosity and BH mass determined…
Spitzer Survey of Stellar Structure in Galaxies (SG). The Pipeline 4: Multi-component decomposition strategies and data release
Heikki Salo, Eija Laurikainen, Jarkko Laine +20
The Spitzer Survey of Stellar Structure in Galaxies (SG, Sheth et. al. 2010) is a deep 3.6 and 4.5 m imaging survey of 2352 nearby ( Mpc) galaxies. We describe the S$…