Compact Groups in the SDSS

Details Compact Groups in the SDSS Compact Groups in the SDSS

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006rmxac..26..189d&link_type=abstract

XI IAU Regional Latin American Meeting of Astronomy (Eds. L. Infante & M. Rubio) Revista Mexicana de Astronomía y Astrofísica (S

Astronomy and Astrophysics

Astronomy

Scientific paper

We identify compact groups in the Sloan Digital Sky Survey (SDSS) using an algorithm similar to that developed by Lee et al. (2003, astro-ph 0312553). Given that some authors claim compact groups to be chance alignments of galaxies or diffuse galaxy groups cores (Zandivarez et al. 2003, MNRAS, 340, 1400), our intention is to make a statistical study of the amount of compact groups that are real entities.
To do so, we construct mock catalogues of the SDSS from cosmological numerical N-body simulations and identify compact groups with the previous algorithm.
Next we compare them with groups identified with a tree-dimensional algorithm similar to the friend of-friends algorithm developed by Huchra & Geller (1982, ApJ, 257, 423).

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