AAS 199th meeting, Washington, DC, January 2002
Session 100. Galaxy Clusters and Mergers
Display, Wednesday, January 9, 2002, 9:20am-6:30pm, Exhibit Hall

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[100.19] Compact Groups of Galaxies in the SDSS Early Data Release

B. C. Lee, D. L. Tucker (FNAL), S. S. Allam (NRIAG/FNAL)

Compact groups (CGs) of galaxies --- relatively poor groups of galaxies in which the typical separations between members is of the order of a galaxy diameter --- offer an exceptional laboratory for the study of dense galaxian environments with short (< 1~Gyr) dynamical timescales. We are studying methods for extracting an objectively defined catalog of CGs from the Sloan Digital Sky Survey (SDSS) Early Data Release down to a limiting galaxy magnitude of r*=21. As a first attempt, we have examined Hickson's (1982) criteria for finding CGs on over 200~deg2 of SDSS commissioning data down to a magnitude of r*=21. Modifications to the criteria were examined in order to reduce the rate of chance alignments. For the final catalog, redshifts and colors of group members are compared to a similarly selected catalog of field galaxies.

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The author(s) of this abstract have provided an email address for comments about the abstract: bclee@fnal.gov

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