873 citations · 10.5k across the 211 of their papers we have counts for
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The Expected Detection of Dust Emission from High-Redshift Lyman Alpha Galaxies
Steven Finkelstein, Sangeeta Malhotra, James Rhoads +2
Recent results have shown that a substantial fraction of high-redshift Lyman alpha galaxies contain considerable amounts of dust. This implies that Lyman alpha galaxies are not pri…
Spectroscopic Confirmation of Faint Lyman Break Galaxies at Redshifts Four and Five in the Hubble Ultra Deep Field
James E. Rhoads, Sangeeta Malhotra, Norbert Pirzkal +6
We present the faintest spectroscopically confirmed sample of redshift four and five Lyman break galaxies to date. The sample is based on slitless grism spectra of the Hubble Ultra…
Stellar Populations of Late-Type Bulges at z=1 in the HUDF
N. P. Hathi, I. Ferreras, A. Pasquali +5
We combine the exceptional depth of the Hubble Ultra Deep Field (HUDF) images and the deep GRism ACS Program for Extragalactic Science (GRAPES) grism spectroscopy to explore the st…
Emission-Line Galaxies from the PEARS Hubble Ultra Deep Field: A 2-D Detection Method and First Results
Amber N. Straughn, Gerhardt R. Meurer, Norbert Pirzkal +11
The Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) grism PEARS (Probing Evolution And Reionization Spectroscopically) survey provides a large dataset of low-resolut…
The Galaxy Luminosity Function at z~1 in the HUDF: Probing the Dwarf Population
R. E. Ryan, N. P. Hathi, S. H. Cohen +10
We present a catalog of spectro-photometric redshifts for 1308 galaxies from the GRism ACS Program for Extragalactic Science (GRAPES) observations with the Hubble Space Telescope.…
Automated selection and characterization of emission-line sources in ACS WFC grism data
Gerhardt R. Meurer, Z. I. Tsvetanov, C. Gronwall +10
We present complimentary techniques to find emission-line targets and measure their properties in a semi-automated fashion from grism observations obtained with the Advanced Camera…
Redshifts of Emission Line Objects in the Hubble Ultra Deep Field
Chun Xu, Norbert Pirzkal, Sangeeta Malhotra +16
We present redshifts for 115 emission line objects in the Hubble Ultra Deep Field (HUDF) identified through the GRism ACS Program for Extragalactic Science (GRAPES) project using t…
The Ages and Masses of Lyman Alpha Galaxies at Redshift
Steven L. Finkelstein, James E. Rhoads, Sangeeta Malhotra +2
We examine the stellar populations of a sample of 98 redshift 4.5 Lyman alpha emitting galaxies using their broadband colors derived from deep photometry at the MMT. These galaxies…
Optical to mid-IR observations of Lyman-alpha galaxies at redshift 5 in the HUDF: a young and low mass population
Norbert Pirzkal, Sangeeta Malhotra, James E. Rhoads +1
High redshift galaxies selected on the basis of their strong Lyman-alpha emission tend to be young ages and small physical sizes. We show this by analyzing the spectral energy dist…
Evidence for TP-AGB stars in high redshift galaxies, and their effect on deriving stellar population parameters
C. Maraston, E. Daddi, A. Renzini +5
We explore the effects of stellar population models on estimating star formation histories, ages and masses of high redshift galaxies. The focus is on the Thermally-Pulsing Asympto…
Did Galaxy Assembly and Supermassive Black-Hole Growth go hand-in-hand?
R. A. Windhorst, S. H. Cohen, A. N. Straughn +10
In this paper, we address whether the growth of supermassive black-holes has kept pace with the process of galaxy assembly. For this purpose, we first searched the Hubble Ultra Dee…
Clues to AGN Growth from Optically Variable Objects in the Hubble Ultra Deep Field
S. H. Cohen, R. E. Ryan, A. N. Straughn +9
We present a photometric search for objects with point-source components that are optically variable on timescales of weeks--months in the Hubble Ultra Deep Field (HUDF) to i'(AB)=…
Evidence for a Massive Post-Starburst Galaxy at z ~ 6.5
B. Mobasher, M. Dickinson, H. C. Ferguson +26
We present results from a search for high-redshift J--band ``dropout'' galaxies in the portion of the GOODS southern field that is covered by extremely deep imaging from the Hubble…
Morphology and evolution of emission line galaxies in the Hubble Ultra Deep Field
N. Pirzkal, C. Xu, I. Ferreras +8
We investigate the properties and evolution of a sample of galaxies selected to have prominent emission lines in low-resolution grism spectra of the Hubble Ultra Deep Field (HUDF).…
The Structure and Star Formation History of Early-Type Galaxies in the UDF/GRAPES Survey
A. Pasquali, I. Ferreras, N. Panagia +9
We present a two-pronged approach to the formation of early-type galaxies, using a sample of 18 galaxies at 0.5 < z < 1 from the HST/ACS Ultra Deep Field and GRAPES surveys: 1) We…
Passively Evolving Early-type Galaxies at 1.4<z<2.5 in the Hubble Ultra Deep Field
E. Daddi, A. Renzini, N. Pirzkal +13
We report on a complete sample of 7 luminous early-type galaxies in the Hubble Ultra Deep Field (UDF) with spectroscopic redshifts between 1.39 and 2.47 and to K<23 AB. Using the B…
An overdensity of galaxies at z=5.9 +/-0.2 in the Ultra Deep Field confirmed using the ACS grism
S. Malhotra, J. E. Rhoads, N. Pirzkal +17
We present grism spectra taken with the Advanced Camera for Surveys to identify 29 red sources with (i'-z') > 0.9 in the Hubble Ultra Deep Field (HUDF). Of these 23 are found to be…
Stars in the Hubble Ultra Deep Field
N. Pirzkal, K. C. Sahu, A. Burgasser +11
We identified 46 unresolved source candidates in the Hubble Ultra Deep Field, down to i775 = 29.5. Unresolved objects were identified using a parameter S, which measures the deviat…
A Redshift z=5.4 Lyman alpha Emitting Galaxy with Linear Morphology in the GRAPES/UDF Field
James E. Rhoads, Nino Panagia, Rogier A. Windhorst +21
We have discovered an extended Lyman alpha plume associated with a compact source at redshift 5.4 in slitless spectroscopic data from the Grism ACS Program for Extragalactic Scienc…
GRAPES, Grism Spectroscopy of the Hubble Ultra Deep Field: Description and Data Reduction
N. Pirzkal, C. Xu, S. Malhotra +19
We present deep unbiased spectroscopy of the Hubble Ultra Deep Field (UDF) carried out using the slitless grism spectroscopy mode of the Advance Camera for Surveys on the Hubble Sp…
Discovery of a Solitaire Dwarf Galaxy in the APPLES Survey
A. Pasquali, S. Larsen, I. Ferreras +5
During the APPLES parallel campaign, the HST Advanced Camera for Surveys has resolved a distant stellar system, which appears to be an isolated dwarf galaxy. It is characterized by…
An IR Search for Extinguished Supernovae in Starburst Galaxies
Bruce Grossan, Earl Spillar, Robert Tripp +3
IR and Radio band observations of heavily extinguished regions in starburst galaxies suggest a very high SN rate associated with such regions. Optically measured supernova (SN) rat…
A search for close bright companions to AeBe stars
N. Pirzkal, E. J. Spillar, H. M. Dyck
We present the result of IR observations in the K band of 39 bright AeBe stars in the northern hemisphere. Using the shift-and-add technique, we were able to detect nearby objects…