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The Millennium Galaxy Catalogue: Dynamically Close Pairs of Galaxies and the Global Merger Rate

de Propris, Roberto; Liske, Jochen; Driver, Simon; Allen, Paul; Cross, Nicholas J G

Description

We derive the number of dynamically close companions per galaxy (Nc) and their total luminosity (Lc) for galaxies in the Millennium Galaxy Catalogue. Nc is similar to the fraction of galaxies in close pairs and is directly related to the galaxy merger rate. We find Nc = 0.0174 ± 0.0015 and Lc = (252 ± 30) × 106 L⊙ for galaxies with -22 < MB - 5 log h < -19 and (z) = 0.123, and Nc = 0.0357 ± 0.0027 and Lc = (294 ± 31) × 106 L⊙ for galaxies with -21 < MB -5 log h < -18 and (z) = 0.116. The...[Show more]

CollectionsANU Research Publications
Date published: 2005
Type: Journal article
URI: http://hdl.handle.net/1885/79219
Source: Astronomical Journal
DOI: 10.1086/433169

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