The CFHTLS Deep Catalog of Interacting Galaxies I. Merger Rate Evolution to z=1.2 - Astrophysics > Cosmology and Nongalactic AstrophysicsReport as inadecuate




The CFHTLS Deep Catalog of Interacting Galaxies I. Merger Rate Evolution to z=1.2 - Astrophysics > Cosmology and Nongalactic Astrophysics - Download this document for free, or read online. Document in PDF available to download.

Abstract: We present the rest-frame optical galaxy merger fraction between 0.24sigma level of confidence. A mild trend, where massivegalaxies with M>10^10.7 M sun are undergoing fewer mergers than less massivesystems M~10^10 M sun, consistent with the expectations of galaxy assemblydownsizing is observed. Our results also show that interacting galaxies have onaverage SFRs double that found in non-interacting field galaxies. We concludethat 1 the optical galaxy merger fraction does evolve with redshift, 2 themerger fraction depends mildly on stellar mass, with lower mass galaxies havinghigher merger fractions at z<1, and 3 star formation is triggered at allphases of a merger, with larger enhancements at later stages, consistent withN-body simulations.



Author: Carrie R. Bridge, Raymond G. Carlberg, Mark Sullivan

Source: https://arxiv.org/







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