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Mass transfer and star formation in the early-type galaxy of a mixed pair, am 0327-285

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Mass transfer and star formation in the early-type galaxy of a mixed pair, am 0327-285

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Título Mass transfer and star formation in the early-type galaxy of a mixed pair, am 0327-285
Autor Mello, D.F. de
Kell, W.C.
Sulentic, J.W.
Rampazzo, R.
Bica, Eduardo Luiz Damiani
White, R.E.
Abstract We present evidence for a young stellar population component in the early-type member of the E+S galaxy pair AM 0327-285. This young population is consistent with the occurrence of cross-fueling in this interacting system. We used spectroscopy, optical imaging, IRAS data, and stellar population synthesis to study the stellar content in the early-type galaxy. We also attempted to date episodes of star formation in its nuclear region, from population synthesis and basic dynamical considerations. The dominant population is old and metal-rich ([Z/Z]Θ=0.3) while ~ 10% of the flux at 5870 Å arises from a superimposed young stellar population with age <_ 5 x 10⁸ yr. This age is close to several estimates of the characteristic timescale of the interaction, suggesting that the mass influx associated with this star formation occurred as a result of an earlier phase of the interaction and not as a result of the present geometry of the pair.
Contido em Astronomy and Astrophysics. Berlin. Vol. 297, no. 2 (May 1995), p. 331-337
Assunto Astrofisica extragalatica
Formacao de estrelas
Galaxias elipticas
Populacoes estelares
[en] Galaxies: AM 0327-285
[en] Galaxies: elliptical
[en] Galaxies: interactions
[en] Galaxies: stellar content
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/98495
Arquivos Descrição Formato
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