Tracing the evolution of nearby early-type galaxies in low density environments. The ultraviolet view from GALEX
Source: Astrophysics and Space Science, Volume 335, Number 1, September 2011 , pp. 201-206(6)
Abstract:We detected recent star formation in nearby early-type galaxies located in low density environments, with GALEX Ultraviolet (UV) imaging. Signatures of star formation may be present in the nucleus and in outer rings/arm like structures. Our study suggests that such star formation may be induced by different triggering mechanisms, such as the inner secular evolution driven by bars, and minor accretion phenomena. We investigate the nature of the (FUV-NUV) color vs. Mg2 correlation, and suggest that it relates to “downsizing” in galaxy formation.
Document Type: Research Article
Affiliations: 1: INAF-Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35122, Padova, Italy, Email: email@example.com 2: INAF-Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35122, Padova, Italy 3: Dept. of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD, 21218, USA 4: DSM/Irfu/Service d’Astrophysique, CEA Saclay, 91191, Gif sur Yvette Cedex, France 5: Institut für Astronomie der Universität Wien, Türkenschanzstraße 17, 1180, Wien, Austria
Publication date: September 1, 2011