Galaxy evolution in groups. USGC U268 and USGC U376 in the Leo cloud |
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| Authors: | A Marino L Bianchi P Mazzei R Rampazzo G Galletta |
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| Institution: | 1. Dipartimento di Fisica ed Astronomia “Galileo Galilei”, Vicolo dell’Osservatorio 3, 35122 Padova, Italy;2. Dept. of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USA;3. INAF-Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35122 Padova, Italy |
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| Abstract: | With the aim of investigating galaxy evolution in nearby galaxy groups, we analyzed the spectral energy distribution of 24 galaxies, members of two groups in the Leo cloud, USGC U268 and USGC U376. We estimated the ages and stellar masses of the galaxies by fitting their total apparent magnitudes from far-ultraviolet to near-infrared with population synthesis models. The comparison of the results for a subsample of galaxies with smooth particle hydrodynamic (SPH) simulations with chemo-photometric implementation, shows that in most cases the estimated stellar masses obtained with the two different approaches are in good agreement. The kinematical and dynamical analysis indicates that USGC U268 is in a pre-virial collapse phase while USGC U376 is likely in a more evolved phase towards virialization. |
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| Keywords: | Ultraviolet: galaxies Galaxies: evolution Groups: individual: USGC U268 USGC U376 Galaxies: dynamics Method: numerical |
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