AAS 206th Meeting, 29 May - 2 June 2005
Session 10 Galaxies, Clusters and Large Scale Structure
Poster, Monday, 9:20am-6:30pm, Tuesday, 10:00am-7:00pm, May 30, 2005, Ballroom A

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[10.09] Galaxy evolution seen in the Grism ACS Program for Extragalactic Surveys (GRAPES)

J. Rhoads, S. Malhotra, N. Pirzkal, C. Xu (STScI), E. Daddi (NOAO), A. Pasquali (ETH, Zurich), C. Gronwall (Penn State University), N. Panagia (STScI), GRAPES Team

The GRAPES project has obtained the deepest slitless spectroscopy to date, using the ACS grism on the Hubble Space Telescope. These sensitive spectra allow us to obtain spectroscopic classifications and redshifts for extremely faint galaxies in the Hubble Ultra Deep Field (HUDF)--- to AB magnitudes fainter than 27. We have used these data to characterize several types of galaxy population: Lyman break and Lyman alpha galaxies at 4 < z < 7, old stellar populations at 0.5 < z < 2.5 , and emission line galaxies at z<1.5. In this poster, we discuss galaxy evolution as traced by this rich data set. We concentrate especially on our Lyman break samples, which achieve lower luminosities than any previous spectroscopically confirmed Lyman break sample, and are supplemented by still fainter photometrically selected samples from the HUDF. We also summarize our results on elliptical galaxies and emission line galaxies, which span the epoch when star formation peaked in the universe. (The reduced data is now publically available)

If you would like more information about this abstract, please follow the link to http://www.stsci.edu/science/grapes/. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: rhoads@stsci.edu

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Bulletin of the American Astronomical Society, 37 #2
© 2005. The American Astronomical Soceity.