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Outer stellar disks and star-forming rings in S0 galaxies

Published online by Cambridge University Press:  21 March 2017

I. S. Proshina ,
A. Yu. Kniazev  and
O. K. Sil’chenko
I. S. Proshina
Affiliation:
Sternberg Astronomical Institute, Lomonosov Moscow State University, University av. 13, 119991 Moscow, Russia email: ii.pro@mail.ru, olga@sai.msu.su
A. Yu. Kniazev
Affiliation:
Sternberg Astronomical Institute, Lomonosov Moscow State University, University av. 13, 119991 Moscow, Russia email: ii.pro@mail.ru, olga@sai.msu.su South African Astronomical Observatory and SALT Foundation, PO Box 9, 7935 Observatory, Cape Town, South Africa email: akniazev@saao.ac.za
O. K. Sil’chenko
Affiliation:
Sternberg Astronomical Institute, Lomonosov Moscow State University, University av. 13, 119991 Moscow, Russia email: ii.pro@mail.ru, olga@sai.msu.su
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Abstract

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We have studied a small sample of star-forming outer rings in unbarred lenticular galaxies by means of long-slit spectroscopy. We have determined metallicities of the outer stellar disks and of the ionized gas in the rings. While the stellar disks of the S0s are metal-poor, [Z/H] < −0.4, the gas has strictly solar oxygen abundance in all the cases.

Keywords

galaxies: elliptical and lenticularcD - galaxies: evolution - galaxies: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S321: Formation and Evolution of Galaxy Outskirts , March 2016 , pp. 286
Copyright
Copyright © International Astronomical Union 2017 

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