Clustering of Galaxies in HST Medium-Deep Survey Images

Details Clustering of Galaxies in HST Medium-Deep Survey Images Clustering of Galaxies in HST Medium-Deep Survey Images

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.7105c&link_type=abstract

American Astronomical Society, 183rd AAS Meeting, #71.05; Bulletin of the American Astronomical Society, Vol. 25, p.1399

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We report on the distribution and clustering of faint galaxies in approximately 20 HST Wide Field Camera images of random fields, taken as part of the Medium-Deep Survey Key Project. Limiting magnitudes in the V-band vary from 22 to 25, depending on the length of the exposure and the sky background; each image contains between several tens and a few hundred galaxies. The clustering is studied both by estimating the two-point correlation function and via a nearest-neighbor algorithm. Preliminary results indicate that up to 20% of the galaxies may be in small groups containing 5--8 objects within a few hundred kpc, and a similar number are in pairs with separation not exceeding 30 kpc. The implications on the merging rate at moderate redshifts are discussed.

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