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Early-type galaxies in the PEARS survey: Probing the stellar populations at moderate redshift
Ignacio Ferreras, Anna Pasquali, Sangeeta Malhotra +10
Using HST/ACS slitless grism spectra from the PEARS program, we study the stellar populations of morphologically selected early-type galaxies in the GOODS North and South fields. T…
Emission-Line Galaxies from the HST PEARS Grism Survey I: The South Fields
A. N. Straughn, N. Pirzkal, G. R. Meurer +14
We present results of a search for emission-line galaxies in the Southern Fields of the Hubble Space Telescope PEARS (Probing Evolution And Reionization Spectroscopically) grism su…
Ly-alpha emitting galaxies at redshift z~4.5 in the LALA Cetus field
Jun-Xian Wang, Sangeeta Malhotra, James E. Rhoads +2
We present a large sample of Ly-alpha emitting galaxies spectroscopically confirmed at z~4.5, based on IMACS spectroscopic observations of candidate LAEs in the LALA Cetus field. W…
Improved Photometric Redshifts with Surface Luminosity Priors
Lifang Xia, Seth Cohen, Sangeeta Malhotra +6
We apply Bayesian statistics with prior probabilities of galaxy surface luminosity (SL) to improve photometric redshifts. We apply the method to a sample of 1266 galaxies with spec…
A Physical Model of Lyman Alpha Emitters
Vithal Tilvi, Sangeeta Malhotra, James E. Rhoads +4
We present a simple physical model for populating dark matter halos with Lyman Alpha Emiiters(LAEs) and predict the physical properties of LAEs at z~3-7. The central tenet of this…
A Plethora of AGN Among Lyman Alpha Galaxies at Low Redshift
Steven L. Finkelstein, Seth H. Cohen, Sangeeta Malhotra +4
We investigate the fraction of z ~ 0.3 Lyman alpha emitting galaxies (LAEs) which host active galactic nucleus activity, which is typically from 1 - 5% at 2 < z < 6. Using optical…