Inner polar ionized-gas disks and properties of their host galaxies

Автор: Sil’chenko O.K.
Сборник: Proceedings of the IAU Symposium 309 "Galaxies in 3D across the Universe"
Серия: Proceedings of the IAU
Том: 10
Год издания: 2015
Издательство: Cambridge University Press
Местоположение издательства: United Kingdom
Первая страница: 53
Последняя страница: 56
DOI: 10.1017/S1743921314009296
Аннотация: I have analyzed line-of-sight velocity fields of the stellar and ionized-gas components for the volume-limited sample of nearby lenticular galaxies by using the raw data of the ATLAS-3D survey undertaken with the integral-field spectrograph SAURON. Among 200 nearby lenticular galaxies, I distinguish 20 cases of nearly orthogonal rotation of the inner ionized gas with respect to the central stellar components; so I estimate a frequency of the inner polar disks in nearby S0 galaxies as 10%. Properties of the central stellar populations -- mean ages, metallicities, magnesium-to-iron ratios -- are derived through the Lick indices. The typical stellar population properties of the polar-disk host galaxies are exactly the same as the stellar population properties of the complete sample.
Добавил в систему: Сильченко Ольга Касьяновна

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