NIR/Optical Selected Local Mergers --- Spatial Density and sSFR Enhancement

Details NIR/Optical Selected Local Mergers --- Spatial Density and sSFR Enhancement NIR/Optical Selected Local Mergers --- Spatial Density and sSFR Enhancement

2012-01-24

arxiv.org/abs/1201.4898v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

A review talk; 8 pages; to appear on the Conference Proceedings for "Galaxy Mergers in an Evolving Universe", held in Hualien,

Scientific paper

Mergers play important roles in triggering the most active objects in the universe, including (U)LIRGs and QSOs. However, whether they are also important for the total stellar mass build-up in galaxies in general is unclear and controversial. Answer to that question depends on the merger rate and on the average strength of merger induced star formation. In this talk, I will review studies on spatial density and sSFR enhancement of local mergers found in NIR/optical selected pair samples. In line with the current literature on galaxy formation/evolution, special attention will be paid on the dependence of the local merger rate and the sSFR enhancement on four fundamental observables: (1) stellar mass, (2) mass ratio, (3) separation, and (4) environment.

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