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Paper: Evolutionary stage of a local sample of irregular galaxies
Volume: 176, Observational Cosmology: The Development of Galaxy Systems
Page: 398
Authors: Borriello, A.; Saracco, P.; Maccagni, D.; Chincarini, G.; Garilli, B.
Abstract: We present the results of a multiband study (BVRIJHK') of a sample of local late-type spiral and irregular non-cluster galaxies aimed at establishing their colors and evolutionary stage. Our findings support a scenario whereby dwarf (low mass) irregular galaxies are characterized by younger stellar populations with respect to massive ones. Indeed, their bluer optical and optical--IR colors, lower mean metallicity and higher HI percentage are most easily explained by an early evolutionary stage.
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