Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005assl..329..285p&link_type=abstract
Starbursts: From 30 Doradus to Lyman Break Galaxies, Held in Cambridge, UK, 6-10 September 2004. Edited by R. de Grijs and R.M.
Astronomy and Astrophysics
Astrophysics
Scientific paper
New surveys with the Spitzer space telescope identify distant starburst and active galaxies by their strong emission at far-infrared (IR) wavelengths. Using deep Spitzer surveys at 24 and 70μm coupled with HST imaging in the Chandra Deep Field South, we study the relation between galaxy morphology and IR-active stages of galaxy evolution. IR-luminous galaxies span a wide range of morphology. At z˜1, there is a correlation between the relative fraction of galaxies with morphological distortions (multiple nuclei, tidal tails, etc.) and increasing IR luminosity, which suggests that the strong starbursts at high redshift arise from galaxy interactions. However, the majority of IR-luminous galaxies do not have exceptionally asymmetric morphologies, and galaxies with strong asymmetries correspond to a range of galaxy IR activity. We conclude that the relation between galaxy morphology and IR activity is highly complex, and strongly dependent on the initial conditions of galaxy interactions.
Dole Herve
Egami Eiichi E.
Le Floc'h Emeric
Papovich Casey
Perez-Gonzalez Pablo
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