Central regions of the early-type galaxies in the NGC 3169 groupстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We have investigated the central regions of the galaxies in the NGC 3169/NGC 3166/NGC
3156 group with the Multi-Pupil Fiber Spectrograph (MPFS) of the 6-m telescope; the first (central) galaxy in the group is a spiral (Sa) one and the other two galaxies are lenticular ones. The group is known to have an extended HI cloud with a size of more than 100 kpc that is associated in its position, orientation, and rotation with the central galaxy NGC 3169. The mean age of the stellar populations in the centers of all three galaxies has been found to be approximately the same, 1 Gyr. Since the galaxies are early-type ones and since NGC 3166 and NGC 3156 show no global star formation, we are dealing here with a synchronous star formation burst in the centers of all three galaxies.