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An upper limit to the dry merger rate at ~0.55

De Propris, Roberto; Driver, Simon P; Colless, Matthew; Drinkwater, Michael John; Loveday, Jon; Ross, Nicholas P; Bland-Hawthorn, Joss; York, Donald G.; Pimbblet, Kevin

Description

We measure the fraction of luminous red galaxies (LRGs) in dynamically close pairs (with projected separation less than 20 h-1 kpc and velocity difference less than 500 km s-1) to estimate the dry merger rate for galaxies with -23 < M(r)k+e,z=0.2 + 5log h < -21.5 and 0.45 < z < 0.65 in the 2dF-SDSS LRG and QSO (2SLAQ) redshift survey. For galaxies with a luminosity ratio of 1:4 or greater we determine a 5σ upper limit to the merger fraction of 1.1% and a merger rate of <0.8 × 10-5 Mpc-3 Gyr-1...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
URI: http://hdl.handle.net/1885/79083
Source: Astronomical Journal
DOI: 10.1088/0004-6256/139/2/794

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