93 citations · 903 across the 26 of their papers we have counts for
26 papers
Galaxy Lookback Evolution Models -- a Comparison with Magneticum Cosmological Simulations and Observations
Rolf-Peter Kudritzki, Adelheid F. Teklu, Felix Schulze +4
We construct empirical models of star-forming galaxy evolution assuming that individual galaxies evolve along well-known scaling relations between stellar mass, gas mass and star f…
Velocity Dispersions of Massive Quiescent Galaxies from Weak Lensing and Spectroscopy
Yousuke Utsumi, Margaret J. Geller, Harus J. Zahid +6
We use MMT spectroscopy and deep Subaru Hyper Suprime-Cam (HSC) imaging to compare the spectroscopic central stellar velocity dispersion of quiescent galaxies with the effective di…
A Spectroscopic Census of X-ray Systems in the COSMOS Field
Jubee Sohn, Margaret J. Geller, H. Jabran Zahid
We investigate spectroscopic properties of galaxy systems identified based on deep X-ray observations in the COSMOS field. The COSMOS X-ray system catalog we use George et al. (201…
The Coevolution of Massive Quiescent Galaxies and Their Dark Matter Halos over the Last 6 Billion Years
H. Jabran Zahid, Margaret J. Geller, Ivana Damjanov +1
We investigate the growth of massive quiescent galaxies at based on the Sloan Digital Sky Survey and the Smithsonian Hectospec Lensing Survey---two magnitude limited spectr…
A Complete Spectroscopic Census of Abell 2029: A Tale of Three Histories
Jubee Sohn, Margaret J. Geller, H. Jabran Zahid +1
A rich spectroscopic census of members of the local massive cluster Abell 2029 includes 1215 members of A2029 and its two infalling groups, A2033 and a Southern Infalling Group (SI…
Quiescent Galaxy Size and Spectroscopic Evolution: Combining HSC Imaging and Hectospec Spectroscopy
Ivana Damjanov, H. Jabran Zahid, Margaret J. Geller +3
We explore the relations between size, stellar mass and average stellar population age (indicated by D indices) for a sample of intermediate-redshift galaxies f…
Stellar Velocity Dispersion: Linking Quiescent Galaxies to their Dark Matter Halos
H. Jabran Zahid, Jubee Sohn, Margaret J. Geller
We analyze the Illustris-1 hydrodynamical cosmological simulation to explore the stellar velocity dispersion of quiescent galaxies as an observational probe of dark matter halo vel…
hCOSMOS: a dense spectroscopic survey of galaxies in the COSMOS field
Ivana Damjanov, H. Jabran Zahid, Margaret J. Geller +2
We describe the hCOSMOS redshift survey of the COSMOS field conducted with the Hectospec spectrograph on the MMT. In the central 1~deg, the hCOS20.6 subset of the survey is $>9…
A dependence of the tidal disruption event rate on global stellar surface mass density and stellar velocity dispersion
Or Graur, K. Decker French, H. Jabran Zahid +4
The rate of tidal disruption events (TDEs), , is predicted to depend on stellar conditions near the super-massive black hole (SMBH), which are on difficult-to-measure…
The Velocity Dispersion Function for Quiescent Galaxies in the Local Universe
Jubee Sohn, H. Jabran Zahid, Margaret J. Geller
We investigate the distribution of central velocity dispersions for quiescent galaxies in the SDSS at . To construct the field velocity dispersion function (…
The Dependence of the Mass-Metallicity Relation on Large Scale Environment
Po-Feng Wu, H. Jabran Zahid, Ho Seong Hwang +1
We examine the relation between gas-phase oxygen abundance and stellar mass---the MZ relation---as a function of the large scale galaxy environment parameterized by the local densi…
Velocity Dispersion, Size, Sérsic Index and : The Scaling of Stellar Mass with Dynamical Mass for Quiescent Galaxies
H. Jabran Zahid, Margaret J. Geller
We examine the relation between stellar mass, velocity dispersion, size, Sérsic index and for ~40,000 quiescent galaxies in the SDSS. At a fixed stellar mass, galaxies wi…
The Velocity Dispersion Function of Very Massive Galaxy Clusters: Abell 2029 and Coma
Jubee Sohn, Margaret J. Geller, H. Jabran Zahid +3
Based on an extensive redshift survey for galaxy cluster Abell 2029 and Coma, we measure the luminosity functions (LFs), stellar mass functions (SMFs) for the entire cluster member…
The Scaling of Stellar Mass and Central Stellar Velocity Dispersion for Quiescent galaxies at z < 0.7
H. Jabran Zahid, Margaret Geller, Daniel Fabricant +1
We examine the relation between stellar mass and central stellar velocity dispersion-the M-sigma relation-for massive quiescent galaxies at z<0.7. We measure the local relation fro…
A weak lensing view of the downsizing of star-forming galaxies
Yousuke Utsumi, Margaret J. Geller, Ian P. Dell'Antonio +14
We describe a weak lensing view of the downsizing of star forming galaxies based on cross correlating a weak lensing () map with a predicted map constructed from a redshift surv…
Compact E+A Galaxies as a Progenitor of Massive Compact Quiescent Galaxies at 0.2<z< 0.8
H. Jabran Zahid, Nicholas Baeza Hochmuth, Margaret J. Geller +5
We search the Sloan Digital Sky Survey and the Baryon Oscillation Sky Survey to identify ~5500 massive compact quiescent galaxy candidates at 0.2<z<0.8. We robustly classify a subs…
SHELS: Complete Redshift Surveys of Two Widely Separated Fields
Margaret J. Geller, Ho Seong Hwang, Ian P. Dell'Antonio +3
The SHELS (Smithsonian Hectospec Lensing Survey) is a complete redshift survey covering two well-separated fields (F1 and F2) of the Deep Lens Survey. Both fields are more than 94%…
Catalogs of Compact Groups of Galaxies from the Enhanced SDSS DR12
Jubee Sohn, Margaret J. Geller, Ho Seong Hwang +2
We apply a friends-of-friends algorithm to an enhanced SDSS DR12 spectroscopic catalog including redshift from literature to construct a catalog of compact groups of g…
HectoMAP and Horizon Run 4: Dense Structures and Voids in the Real and Simulated Universe
Ho Seong Hwang, Margaret J. Geller, Changbom Park +10
HectoMAP is a dense redshift survey of red galaxies covering a 53 strip of the northern sky. HectoMAP is 97\% complete for galaxies with , , and $(r-i)…
The Stellar Mass Fundamental Plane and Compact Quiescent Galaxies at z < 0.6
H. Jabran Zahid, Ivana Damjanov, Margaret J. Geller +2
We examine the evolution of the relation between stellar mass surface density, velocity dispersion and half-light radiusthe stellar mass fundamental planefor quiescent galaxi…
The Environment of Massive Quiescent Compact Galaxies at in the COSMOS Field
Ivana Damjanov, H. Jabran Zahid, Margaret J. Geller +1
We use Hectospec mounted on the 6.5-meter MMT to carry out a redshift survey of red (, , ) galaxies in the COSMOS field to measure the environments of mas…
A rise in the ionizing photons in star-forming galaxies over the past 5 billion years
Lisa J. Kewley, H. Jabran Zahid, Margaret J. Geller +3
We investigate the change in ionizing photons in galaxies between 0.2<z<0.6 using the F2 field of the SHELS complete galaxy redshift survey. We show, for the first time, that while…
Quiescent Compact Galaxies at Intermediate Redshift in the COSMOS Field II. The Fundamental Plane of Massive Galaxies
H. Jabran Zahid, Ivana Damjanov, Margaret Geller +1
We examine the relation between surface brightness, velocity dispersion and sizethe fundamental planefor quiescent galaxies at intermediate redshifts in the COSMOS field. The…
Quiescent Compact Galaxies at Intermediate Redshift in the COSMOS Field. The Number Density
Ivana Damjanov, Margaret J. Geller, H. Jabran Zahid +1
We investigate the evolution of compact galaxy number density over the redshift range . Our sample consists of galaxies with secure spectroscopic redshifts observed in t…