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Evidence for Ubiquitous, High-EW Nebular Emission in z~7 Galaxies: Towards a Clean Measurement of the Specific Star Formation Rate using a Sample of Bright, Magnified Galaxies
R. Smit, R. J. Bouwens, I. Labbe +30
Growing observational evidence now indicates that nebular line emission has a significant impact on the rest-frame optical fluxes of z~5-7 galaxies observed with Spitzer. This line…
The Spectral Energy Distributions Of z~8 Galaxies From The IRAC Ultra Deep Fields: Emission Lines, Stellar Masses, And Specific Star Formation Rates At 650 Myr
I. Labbe, P. A. Oesch, R. J. Bouwens +8
Using new ultradeep Spitzer/IRAC photometry from the IRAC Ultradeep Field program (IUDF), we investigate the stellar populations of a sample of 63 Y-dropout galaxy candidates at z~…
CLASH: New Multiple-Images Constraining the Inner Mass Profile of MACS J1206.2-0847
A. Zitrin, P. Rosati, M. Nonino +45
We present a strong-lensing analysis of the galaxy cluster MACS J1206.2-0847 (=0.44) using UV, Optical, and IR, HST/ACS/WFC3 data taken as part of the CLASH multi-cycle treasury…
Confirmation of the compactness of a z=1.91 quiescent galaxy with Hubble Space Telescope's Wide Field Camera 3
Daniel Szomoru, Marijn Franx, Pieter G. van Dokkum +6
We present very deep Wide Field Camera 3 (WFC3) photometry of a massive, compact galaxy located in the Hubble Ultra Deep Field. This quiescent galaxy has a spectroscopic redshift z…
UV Continuum Slope and Dust Obscuration from z~6 to z~2: The Star Formation Rate Density at High Redshift
R. J. Bouwens, G. D. Illingworth, M. Franx +6
We provide a systematic measurement of the rest-frame UV continuum slope beta over a wide range in redshift (z~2-6) and rest-frame UV luminosity (0.1-2L*) to improve estimates of t…
Structure and Morphologies of z~7-8 Galaxies from ultra-deep WFC3/IR Imaging of the HUDF
P. A. Oesch, R. J. Bouwens, C. M. Carollo +6
We present a first morphological study of z~7-8 Lyman Break galaxies (LBGs) from Oesch et al. 2009 and Bouwens et al. 2009 detected in ultra-deep near-infrared imaging of the Hubbl…
Discovery of z~8 Galaxies in the HUDF from ultra-deep WFC3/IR Observations
R. J. Bouwens, G. D. Illingworth, P. A. Oesch +8
We utilize the newly-acquired, ultra-deep WFC3/IR observations over the HUDF to search for star-forming galaxies at z~8-8.5, only 600 million years from recombination, using a Y_{1…