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

Published online by Cambridge University Press:  09 February 2015

Olga K. Sil'chenko
Olga K. Sil'chenko*
Affiliation:
Sternberg Astronomical Institute, Lomonosov Moscow State University, University av. 13, 119991 Moscow, Russia email: olga@sai.msu.su
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Abstract

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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.

Keywords

galaxies: elliptical and lenticularcD - galaxies: evolution - galaxies: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S309: Galaxies in 3D across the Universe , July 2014 , pp. 53 - 56
Copyright
Copyright © International Astronomical Union 2015 

References

Cappellari, M., Emsellem, E., Krajnovic, D., McDermid, R. M., Scott, N., et al. 2011, MNRAS, 413, 813Google Scholar
Davis, T. A., Alatalo, K., Sarzi, M., Bureau, M., Young, L. M., et al. 2011, MNRAS, 417, 882Google Scholar
Katkov, I. Yu., Sil'chenko, O. K., & Afanasiev, V. L. 2014, MNRAS, 438, 2798CrossRefGoogle Scholar
Moiseev, A. V., Valdés, J. R., & Chavushyan, V. H. 2004, A&A, 421, 433Google Scholar
Moiseev, A. V., Smirnova, K. I., Smirnova, A. A., & Reshetnikov, V. P. 2011, MNRAS, 418, 244CrossRefGoogle Scholar
Moiseev, A. V. 2012, Astrophys. Bull., 67, 147Google Scholar
Thomas, D., Maraston, C., & Bender, R. 2003, MNRAS, 339, 897Google Scholar
Worthey, G., Faber, S. M., González, J. J., & Burstein, D. 1994, ApJS, 94, 687Google Scholar