193 citations · 2k across the 27 of their papers we have counts for
27 papers
Probing a Magnetar Origin for the population of Extragalactic Fast X-ray Transients detected by Chandra
J. Quirola-Vásquez, F. E. Bauer, P. G. Jonker +10
Twenty-two extragalactic fast X-ray transients (FXTs) have now been discovered from two decades of Chandra data (analyzing ~259 Ms of data), with 17 associated with distant galaxie…
Extragalactic FXT Candidates Discovered by Chandra (2014-2022)
J. Quirola-Vásquez, F. E. Bauer, P. G. Jonker +9
Extragalactic fast X-ray transients (FXTs) are short flashes of X-ray photons of unknown origin that last a few minutes to hours. We extend the search for extragalactic FXTs from Q…
Extragalactic fast X-ray transient candidates discovered by Chandra (2000-2014)
J. Quirola-Vasquez, F. E. Bauer, P. G. Jonker +7
Extragalactic Fast X-ray Transients (FXRTs) are short flashes of X-ray photons spanning a few seconds to hours, with an uncertain origin. Our ignorance about their physical mechani…
HUBS: A dedicated hot circumgalactic medium explorer
Wei Cui
The Hot Universe Baryon Surveyor (HUBS) mission is proposed to study "missing" baryons in the universe. Unlike dark matter, baryonic matter is made of elements in the periodic tabl…
Revealing the relation between black-hole growth and host-galaxy compactness among star-forming galaxies
Q. Ni, W. N. Brandt, G. Yang +8
Recent studies show that a universal relation between black-hole (BH) growth and stellar mass () or star formation rate (SFR) is an oversimplification of BH-galaxy co-e…
Searching for fast extragalactic X-ray transients in Chandra surveys
Guang Yang, W. N. Brandt, S. F. Zhu +4
Recent works have discovered two fast ( ks) extragalactic X-ray transients in the Chandra Deep Field-South (CDF-S XT1 and XT2). These findings suggest that a large popu…
VALES: IV. Exploring the transition of star formation efficiencies between normal and starburst galaxies using APEX/SEPIA Band-5 and ALMA at low redshift
C. Cheng, E. Ibar, T. M. Hughes +12
In this work we present new APEX/SEPIA Band-5 observations targeting the CO () emission line of 24 Herschel-detected galaxies at . Combining this sample {w…
AGN-Host Connection at 0.5 < z < 2.5: A rapid evolution of AGN fraction in red galaxies during the last 10 Gyr
Tao Wang, D. Elbaz, D. M. Alexander +13
We explore the dependence of the incidence of moderate-luminosity ( erg s) AGNs and the distribution of their accretion rates on host color at 0.5 <…
VALES: II. The physical conditions of interstellar gas in normal star-forming galaxies up to z=0.2 revealed by ALMA
T. M. Hughes, E. Ibar, V. Villanueva +18
We use new Band-3 CO(1-0) observations taken with the Atacama Large Millimeter/submillimeter Array (ALMA) to study the physical conditions in the interstellar gas of a sample of 27…
Long-Term X-ray Variability of Typical Active Galactic Nuclei in the Distant Universe
G. Yang, W. Brandt, B. Luo +13
We perform long-term ( yr, observed-frame) X-ray variability analyses of the 68 brightest radio-quiet active galactic nuclei (AGNs) in the 6 Ms Deep Field-Sou…
The 2 Ms Chandra Deep Field-North Survey and the 250 ks Extended Chandra Deep Field-South Survey: Improved Point-Source Catalogs
Y. Q. Xue, B. Luo, W. N. Brandt +4
We present improved point-source catalogs for the 2 Ms Chandra Deep Field-North (CDF-N) and the 250 ks Extended Chandra Deep Field-South (E-CDF-S), implementing a number of recent…
Research Data Explored: Citations versus Altmetrics
Isabella Peters, Peter Kraker, Elisabeth Lex +2
The study explores the citedness of research data, its distribution over time and how it is related to the availability of a DOI (Digital Object Identifier) in Thomson Reuters' DCI…
X-ray bright active galactic nuclei in massive galaxy clusters III: New insights into the triggering mechanisms of cluster AGN
S. Ehlert, S. W. Allen, W. N. Brandt +6
We present the results of a new analysis of the X-ray selected Active Galactic Nuclei (AGN) population in the vicinity of 135 of the most massive galaxy clusters in the redshift ra…
An ALMA Survey of Submillimeter Galaxies in the Extended Chandra Deep Field South: The AGN Fraction and X-ray Properties of Submillimeter Galaxies
S. X. Wang, W. N. Brandt, B. Luo +17
The large gas and dust reservoirs of submm galaxies (SMGs) could potentially provide ample fuel to trigger an Active Galactic Nucleus (AGN), but previous studies of the AGN fractio…
X-ray Bright Active Galactic Nuclei in Massive Galaxy Clusters II: The Fraction of Galaxies Hosting Active Nuclei
S. Ehlert, A. von der Linden, S. W. Allen +7
We present a measurement of the fraction of cluster galaxies hosting X-ray bright Active Galactic Nuclei (AGN) as a function of clustercentric distance scaled in units of …
Unveiling a population of galaxies harboring low-mass black holes with X-rays
M. Schramm, J. D. Silverman, J. E. Greene +7
We report the discovery of three low-mass black hole candidates residing in the centers of low-mass galaxies at z<0.3 in the Chandra Deep Field - South Survey. These black holes ar…
GOODS-Herschel: radio-excess signature of hidden AGN activity in distant star-forming galaxies
A. Del Moro, D. M. Alexander, J. R. Mullaney +23
We present here a new spectral energy distribution (SED) fitting approach that we adopt to select radio-excess sources amongst distant star-forming galaxies in the GOODS-Herschel (…
Tracking Down the Source Population Responsible for the Unresolved Cosmic 6-8 keV Background
Y. Q. Xue, S. X. Wang, W. N. Brandt +10
Using the 4 Ms Chandra Deep Field-South (CDF-S) survey, we have identified a sample of 6845 X-ray undetected galaxies that dominates the unresolved ~ 20-25% of the 6-8 keV cosmic X…
X-ray Bright Active Galactic Nuclei in Massive Galaxy Clusters I: Number Counts and Spatial Distribution
S. Ehlert, S. W. Allen, W. N. Brandt +5
We present an analysis of the X-ray bright point source population in 43 massive clusters of galaxies observed with the Chandra X-ray Observatory. We have constructed a catalog of…
Variability Selected Low-Luminosity Active Galactic Nuclei in the 4 Ms Chandra Deep Field-South
M. Young, W. N. Brandt, Y. Q. Xue +8
The 4 Ms Chandra Deep Field-South (CDF-S) and other deep X-ray surveys have been highly effective at selecting active galactic nuclei (AGN). However, cosmologically distant low-lum…
Supermassive Black Hole Growth in Starburst Galaxies over Cosmic Time: Constraints from the Deepest Chandra Fields
D. A. Rafferty, W. N. Brandt, D. M. Alexander +5
We present an analysis of deep multiwavelength data for z ~ 0.3-3 starburst galaxies selected by their 70 um emission in the Extended-Chandra Deep Field-South and Extended Groth St…
X-ray Spectral Constraints for z~2 Massive Galaxies: The Identification of Reflection-Dominated Active Galactic Nuclei
D. M. Alexander, F. E. Bauer, W. N. Brandt +18
We use the 4Ms CDF-S survey to place direct X-ray constraints on the ubiquity of z~2 heavily obscured AGNs in K<22 BzK galaxies. Forty seven of the 222 BzK galaxies in the central…
A Compton-thick AGN at z~5 in the 4 Ms Chandra Deep Field South
R. Gilli, J. Su, C. Norman +13
We report the discovery of a Compton-thick Active Galactic Nucleus (AGN) at z=4.76 in the 4 Ms Chandra Deep Field South. This object was selected as a V-band dropout in HST/ACS ima…
The Extended Chandra Deep Field-South Survey: Optical spectroscopy of faint X-ray sources with the VLT and Keck
J. D. Silverman, V. Mainieri, M. Salvato +26
We present the results of a program to acquire high-quality optical spectra of X-ray sources detected in the E-CDF-S and its central area. New spectroscopic redshifts are measured…