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Stellar population properties in the nuclei and bulges of nearby lenticular galaxiesстатья
Информация о цитировании статьи получена из
Web of Science
Дата последнего поиска статьи во внешних источниках: 29 мая 2015 г.
- Автор: Sil’chenko O.K.
- Сборник: The Interplay Among Black Holes, Stars and ISM in Galactic Nuclei
- Серия: IAU Symposium
- Том: 222
- Год издания: 2004
- Издательство: Cambridge University Press
- Местоположение издательства: United Kingdom
- Первая страница: 211
- Последняя страница: 212
- DOI: 10.1017/S1743921304002091
- Аннотация: During the period of 1996-2003 we have obtained 2D spectroscopic data in the spectral range of 4600-5400 AA for 54 nearby lenticular galaxies in various types of environments. The observations have been made with the Multi-Pupil Spectrograph of the 6m telescope (MPFS). Here we compare the stellar population properties in the nuclei and in the `bulges' of these galaxies, the term `bulges' being ascribed to the rings between R=3" and R=7". The stellar population abundances and ages are determined by comparing measured Lick indices Mgb, Fe5270 and Fe5335, and H-beta with the evolutionary synthesis model of Thomas, Maraston, and Bender (2003). As we have reported earlier, significant part of nearby lenticular galaxies possess young stellar nuclei: among group second- or third-ranked members and field S0 50% and among group central galaxies and cluster members 25% reveal mean age of the nuclear stellar population less than 5 Gyr. The bulges are almost always older than the nuclei. The effect of environments is seen both for the nuclei and for the bulges: in dense environments the stellar populations of S0 are older by 4--5 Gyr than in sparse ones.
- Добавил в систему: Сильченко Ольга Касьяновна