The Galaxy Major Merger Rate at 3<z<6

Details The Galaxy Major Merger Rate at 3<z<6 The Galaxy Major Merger Rate at 3<z<6

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21342408r&link_type=abstract

American Astronomical Society, AAS Meeting #213, #424.08; Bulletin of the American Astronomical Society, Vol. 41, p.247

Astronomy and Astrophysics

Astronomy

Scientific paper

We compute the galaxy pair fraction and major merger rate from Lyman break galaxies, selected as BVi'-band dropouts from the Hubble Ultra Deep Field and the Great Observatories Origins Deep Survey Fields. From these flux-limited surveys, we construct a volume-limited sample of galaxies with -25.0 1, and peaks at z_frac = 1.37 +- 0.10. Based on variety of plausible merger timescales, we find that 50-80% of luminous galaxies seen today will not have experienced a major merger in the Hubble time. Our observed space density of major mergers is well parameterized by a two-component power-law. We speculate on the role major mergers play in triggering a starburst and/or AGN. We acknowledge NASA grant AR-11772 from STScI, which is operated by AURA, Inc., under NASA contract NAS5-26555.

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