WFPC2 Observations of NGC 454: an Interacting Pair of Galaxies
| Autor: | Inge Heyer, S. Gonzaga, Nino Panagia, Massimo Stiavelli, C. Marcella Carollo, M. Romaniello |
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| Jazyk: | angličtina |
| Rok vydání: | 1997 |
| Předmět: |
Physics
education.field_of_study Star formation Population Astrophysics (astro-ph) FOS: Physical sciences Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Nuclear activity Galaxy Stars Star cluster Space and Planetary Science Young star Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics education Astrophysics::Galaxy Astrophysics Line (formation) |
| Popis: | We present WFPC2 images in the F450W, F606W and F814W filters of the interacting pair of galaxies NGC 454. Our data indicate that the system is in the early stages of interaction. A population of young star-clusters has formed around the late component, and substantial amounts of gas have sunk into the center of the earlier component, where it has not yet produced significant visible star formation or nuclear activity. We have photometric evidence that the star-clusters have strong line emission, which indicate the presence of a substantial component of hot, massive stars which formed less than 5-10 Myrs ago. 14 pages, 4 figures, Latex (AAS macros), ApJL in press |
| Databáze: | OpenAIRE |
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