Kinematics and stellar population of the lenticular galaxy NGC 4124статья
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Дата последнего поиска статьи во внешних источниках: 19 июля 2013 г.
Аннотация:Results of spectroscopic and photometric studies for the locally isolated lenticular galaxy NGC 4124 are presented. A model of the mass distribution consistent with photometric data has been constructed on the basis of a kinematic analysis. In this model, the halo mass within the optical radius is almost half the diskmass. The disk is shown to be in a dynamical state close to amarginally stable one. This rules out dynamical disk heating for the galaxy through a strong external action or a merger with a massive system. However, the presence of a gaseous disk inclined to the main plane of the galaxy in the central kiloparsec region suggests probable cannibalization of a small satellite that also produced a late starburst in the central region. This is confirmed by the younger mean age (∼2 Gyr) of the stellar population in the galaxy’s central region than the disk age (5–7 Gyr).