AAS 207th Meeting, 8-12 January 2006
Session 80 Evolution of Galaxies, Galaxies Surveys II
Poster, Tuesday, 9:20am-6:30pm, January 10, 2006, Exhibit Hall

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[80.19] X-ray Properties of Star-forming Galaxies in the MUSYC Survey

A. Richardson, S. Virani, E. Gawiser, C. M. Urry, E. Treister, J. Van Duyne, L. Miller (Yale University), MUSYC Collaboration

The MUltiwavelength Survey by Yale-Chile (MUSYC) covers one square degree of the sky with deep near-infrared and optical imaging, as well as some Chandra, XMM, Hubble, and Spitzer coverage. As part of this project, we have analyzed the X-ray properties of objects in the extended Chandra Deep Field South (ECDFS), including Lyman Break Galaxies (LBG) and Lyman Alpha Emitters (LAE). A fraction are detected individually due to the presence of active galactic nuclei (AGN), but most are too X-ray faint to detect as individual sources, even in very deep exposures. Subsequently, we performed X-ray stacking analysis on these remaining, optically selected, 76 LAE and 1240 LBG in order to determine their average X-ray properties. This analysis provided an effective integrated exposure time of 17 Ms for the LAE and 233 Ms for the LBG. We present the average X-ray flux of these sources and discuss their implications for star formation.

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