The CFHTLS Deep Catalog of Interacting Galaxies I. Merger Rate Evolution to z=1.2 - Astrophysics > Cosmology and Nongalactic AstrophysicsReportar como inadecuado




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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.



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

Fuente: https://arxiv.org/



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