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N. Pirzkal, S. Malhotra, J.R. Rhoads, X. Chun (STScI)
The HST/ACS BViz images of the H-UDF are the deepest, highest resolution images available today. These images contain faint objects (mz < 29) and their high resolution (0.030''/pixel) allow for accurate morphological measurements of high redshift sources. The GRAPES project (PI:Malhotra) provided 1500 flux calibrated spectra of sources with than mz < 27.5. For the first time, we were able to select emission line galaxies and break galaxies using deep spectroscopic observations and did not have to rely on broad band colors or make assumption about the morphology of these objects. We present a detailed analysis of the morphology of these sources, as measured by the newest version of Galfit (including Fourier Modes), and show how Lyman-Break and Lyman-Alpha galaxies compare morphologically at redshifts of 3 < z < 6.
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Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.