The DEEP2 Galaxy Redshift Survey: Evolution of Close Galaxy Pairs and Major-Merger Rates up to z ~ 1.2
The Astrophysical Journal2004Vol. 617(1), pp. L9–L12
Citations Over TimeTop 10% of 2004 papers
Lihwai Lin, David C. Koo, Christopher N. A. Willmer, David R. Patton, Christopher J. Conselice, Renbin Yan, Alison L. Coil, Michael C. Cooper, Marc Davis, S. M. Faber, Brian F. Gerke, Puragra Guhathakurta, Jeffrey A. Newman
Abstract
We derive the close, kinematic pair fraction and merger rate up to z ~ 1.2 from the initial data of the DEEP2 Redshift Survey. Assuming a mild luminosity evolution, the number of companions per luminous galaxy is found to evolve as (1+z)^{m}, with m = 0.51+-0.28; assuming no evolution, m = 1.60+-0.29. Our results imply that only 9% of present-day $L^{*}$ galaxies have undergone major mergers since z ~ 1.2 and that the average major merger rate is about 4* 10^{-4} h^{3} Mpc^{-3} Gyr^{-1} for z ~ 0.5 - 1.2. Most previous studies have yielded higher values.
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