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35 papers · 2 filters
Kinematic signatures of reverberation mapping of close binaries of supermassive black holes in active galactic nuclei. II. Atlas of two-dimensional transfer functions
Yu-Yang Songsheng, Ming Xiao, Jian-Min Wang +1
Most large galaxies harbor supermassive black holes (SMBHs) in their centers, and galaxies merge. Consequently, binary SMBHs should be common in galactic nuclei. However, close bin…
The East Asian Observatory SCUBA--2 survey of the COSMOS field: unveiling 1147 bright sub-millimeter sources across 2.6 square degrees
J. M. Simpson, Ian Smail, A. M. Swinbank +28
We present sensitive 850m imaging of the COSMOS field using 640hr of new and archival observations taken with SCUBA-2 at the East Asian Observatory's James Clerk Maxwell Telesco…
SCUBA-2 Ultra Deep Imaging Eao Survey (Studies) III: Multi-wavelength properties, luminosity functions and preliminary source catalog of 450-m-selected galaxies
Chen-Fatt Lim, Wei-Hao Wang, Ian Smail +35
We construct a SCUBA-2 450-m map in the COSMOS field that covers an area of 300 arcmin and reaches a 1 noise level of 0.65 mJy in the deepest region. We extract 256 sou…
An ALMA CO(2-1) Survey of Nearby Palomar-Green Quasars
Jinyi Shangguan, Luis C. Ho, Franz E. Bauer +2
The properties of the molecular gas can shed light on the physical conditions of quasar host galaxies and the effect of feedback from accreting supermassive black holes. We present…
A New Channel of Bulge Formation via The Destruction of Short Bars
Minghao Guo, Min Du, Luis C. Ho +2
Short (inner) bars of sub-kiloparsec radius have been hypothesized to be an important mechanism for driving gas inflows to small scales, thus feeding central black holes. Recent nu…
Active Galactic Nuclei with Ultra-fast Outflows Monitoring Project: The Broad-line Region of Mrk 79 as a Disk Wind
Kai-Xing Lu, Jin-Ming Bai, Zhi-Xiang Zhang +23
We developed a spectroscopic monitoring project to investigate the kinematics of the broad-line region (BLR) in active galactic nuclei (AGN) with ultra-fast outflows (UFOs). Mrk~79…
Numerical Simulation and Completeness Survey of Bubbles in the Taurus and Perseus Molecular Clouds
Mengting Liu, Di Li, Marko Krco +3
Previous studies have analyzed the energy injection into the interstellar matter due to molecular bubbles. They found that the total kinetic energies of bubbles are comparable to,…
Intermediate-Mass Black Holes
Jenny E. Greene, Jay Strader, Luis C. Ho
We describe ongoing searches for intermediate-mass black holes with M_BH ~ 100-10^5 M_sun. We review a range of search mechanisms, both dynamical and those that rely on accretion s…
X-shaped Radio Galaxies: Optical Properties, Large-scale Environment and Relationship to Radio Structure
Ravi Joshi, Gopal-Krishna, Xiaolong Yang +9
In order to find clues to the origin of the "winged" or "X-shaped" radio galaxies (XRGs) we investigate here the parent galaxies of a large sample of 106 XRGs for optical-radio axe…
Dirt-cheap Gas Scaling Relations: Using Dust Absorption, Metallicity and Galaxy Size to Predict Gas Masses for Large Samples of Galaxies
Hassen M. Yesuf, Luis C. Ho
We apply novel survival analysis techniques to investigate the relationship between a number of the properties of galaxies and their atomic () and molecular ($M_{\ma…
Multi-wavelength properties of radio and machine-learning identified counterparts to submillimeter sources in S2COSMOS
FangXia An, J. M. Simpson, Ian Smail +36
We identify multi-wavelength counterparts to 1,147 submillimeter sources from the S2COSMOS SCUBA-2 survey of the COSMOS field by employing a recently developed radiomachine-lear…
Nearly all Massive Quiescent Disk Galaxies have a Surprisingly Large Atomic Gas Reservoir
Chengpeng Zhang, Yingjie Peng, Luis C. Ho +11
The massive galaxy population above the characteristic Schechter mass M*~10^10.6 Msun contributes to about half of the total stellar mass in the local Universe. These massive galax…
The Sloan Digital Sky Survey Reverberation Mapping Project: The H Radius-Luminosity Relation
Gloria Fonseca Alvarez, Jonathan R. Trump, Yasaman Homayouni +8
Results from a few decades of reverberation mapping (RM) studies have revealed a correlation between the radius of the broad-line emitting region (BLR) and the continuum luminosity…
Identifying kinematic structures in simulated galaxies using unsupervised machine learning
Min Du, Luis C. Ho, Dongyao Zhao +4
Galaxies host a wide array of internal stellar components, which need to be decomposed accurately in order to understand their formation and evolution. While significant progress h…
The Sloan Digital Sky Survey Reverberation Mapping Project: Comparison of Lag Measurement Methods with Simulated Observations
Jennifer I-Hsiu Li, Yue Shen, W. N. Brandt +8
We investigate the performance of different methodologies that measure the time lag between broad-line and continuum variations in reverberation mapping data using simulated light…
A New Calibration of Star Formation Rate in Galaxies Based on Polycyclic Aromatic Hydrocarbon Emission
Yanxia Xie, Luis C. Ho
Polycyclic aromatic hydrocarbon (PAH) emission has long been proposed to be a potential star formation rate indicator, as it arises from the photodissociation region bordering the…
The buildup of strongly barred galaxies in the TNG100 simulation
Yetli Rosas-Guevara, Silvia Bonoli, Massimo Dotti +7
We analyse the properties of strongly barred disc galaxies using the TNG100 simulation, a cosmological hydrodynamical realisation of the IllustrisTNG suite. We identify 270 disc ga…
The Sloan Digital Sky Survey Reverberation Mapping Project: Improving Lag Detection with an Extended Multi-Year Baseline
Yue Shen, C. J. Grier, Keith Horne +32
We investigate the effects of extended multi-year light curves (9-year photometry and 5-year spectroscopy) on the detection of time lags between the continuum variability and broad…
Impact of Galaxy Mergers on the Colours of Cluster Galaxies
Sree Oh, Keunho Kim, Joon Hyeop Lee +9
We examine the ultraviolet and optical colours of 906 cluster galaxies from the KASI-Yonsei Deep Imaging Survey of Clusters (KYDISC). Galaxies have been divided into two categories…
Recalibration of [O II] as a Star Formation Rate Estimator for Active and Inactive Galaxies
Ming-Yang Zhuang, Luis C. Ho
We investigate the use of the [O II] emission line as a star formation rate (SFR) estimator using Sloan Digital Sky Spectra for nearly 100,000 star-forming galaxies a…
The Evolution of the Interstellar Medium in Post-Starburst Galaxies
Zhihui Li, K. Decker French, Ann I. Zabludoff +1
We derive dust masses () from the spectral energy distributions of 58 post-starburst galaxies (PSBs). There is an anticorrelation between specific dust mass ($M_{\rm…
A Precision Measurement of the Mass of the Black Hole in NGC 3258 from High-Resolution ALMA Observations of its Circumnuclear Disk
Benjamin D. Boizelle, Aaron J. Barth, Jonelle L. Walsh +4
We present resolution Atacama Large Millimeter/submillimeter Array (ALMA) CO(21) imaging of the arcsecond-scale ( pc) dusty molecular di…
The Sloan Digital Sky Survey Reverberation Mapping Project: Initial CIV Lag Results from Four Years of Data
C. J. Grier, Yue Shen, Keith Horne +31
We present reverberation-mapping lags and black-hole mass measurements using the CIV 1549 broad emission line from a sample of 349 quasars monitored as a part of the Sloan Digital…
Supermassive black holes with high accretion rates in active galactic nuclei: X. Optical variability characteristics
Kai-Xing Lu, Ying-Ke Huang, Zhi-Xiang Zhang +10
We compiled a sample of 73 active galactic nuclei (AGNs) with reverberation mapping (RM) observations from RM campaigns including our ongoing campaign of monitoring super-Eddington…