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11 papers · 2 filters
ACS Observations of a Strongly Lensed Arc in a Field Elliptical
J. P. Blakeslee, K. C. Zekser, N. Benitez +15
We report the discovery of a strongly lensed arc system around a field elliptical galaxy in Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) images of a parallel fiel…
The First Detailed X-ray Observations of High-Redshift, Optically-Selected Clusters: XMM-Newton Results for Cl 1324+3011 at z = 0.76 and Cl 1604+4304 at z = 0.90
Lori M. Lubin, John S. Mulchaey, Marc Postman
We present the first detailed X-ray observations of optically-selected clusters at high redshift. Two clusters, Cl 1324+3011 at z = 0.76 and Cl 1604+4304 at z = 0.90, were observed…
Discovery of Globular Clusters in the Proto-Spiral NGC2915: Implications for Hierarchical Galaxy Evolution
G. R. Meurer, J. P. Blakeslee, M. Sirianni +30
We have discovered three globular clusters beyond the Holmberg radius in Hubble Space Telescope Advanced Camera for Surveys images of the gas-rich dark matter dominated blue compac…
The Evolution of Early-type Field Galaxies Selected from a NICMOS Map of the Hubble Deep Field North
S. A. Stanford, M. Dickinson, M. Postman +5
The redshift distribution of well-defined samples of distant early-type galaxies offers a means to test the predictions of monolithic and hierarchical galaxy formation scenarios. N…
Faint Galaxies in deep ACS observations
N. Benitez, H. Ford, R. Bouwens +33
We present the analysis of the faint galaxy population in the Advanced Camera for Surveys (ACS) Early Release Observation fields VV 29 (UGC 10214) and NGC 4676. Here we attempt to…
Advanced Camera for Surveys Photometry of the Cluster RDCS1252.9-2927: The Color-Magnitude Relation at z=1.24
J. P. Blakeslee, M. Franx, M. Postman +20
We investigate the color-magnitude (CM) relation of galaxies in the distant X-ray selected cluster RDCS1252.9-2927 at z=1.24 using images obtained with the Advanced Camera for Surv…
Star Formation at z~6: i-dropouts in the ACS GTO fields
R. J. Bouwens, G. D. Illingworth, P. Rosati +33
Using an i-z dropout criterion, we determine the space density of z~6 galaxies from two deep ACS GTO fields with deep optical-IR imaging. A total of 23 objects are found over 46 ar…
A Merged Catalog of Clusters of Galaxies from Early SDSS Data
Neta A. Bahcall, Timothy A. McKay, James Annis +13
We present a catalog of 799 clusters of galaxies in the redshift range z_est = 0.05 - 0.3 selected from ~400 deg^2 of early SDSS commissioning data along the celestial equator. The…
An I-Band-Selected Sample of Radio-Emitting Quasars: Evidence for a Large Population of Red Quasars
Richard L. White, David J. Helfand, Robert H. Becker +4
We present a new sample of 35 quasars selected from the FIRST radio survey and the Deeprange I-band survey (Postman et al. 1998, 2002). A comparison with the FIRST Bright Quasar su…
HST/ACS Coronagraphic Imaging of the Circumstellar Disk around HD1415659A
M. Clampin, J. E. Krist, D. R. Ardila +31
Multicolor coronagraphic images of the circumstellar disk around HD141569A have been obtained with the Hubble Space Telescope (HST) Advanced Camera for Surveys. B, V, and I images…
Discovery of Two Distant Type Ia Supernovae in the Hubble Deep Field North with the Advanced Camera for Surveys
John P. Blakeslee, Zlatan I. Tsvetanov, Adam G. Riess +30
We present observations of the first two supernovae discovered with the recently installed Advanced Camera for Surveys (ACS) on the Hubble Space Telescope. The supernovae were foun…