On the Origin of S0 Stellar Populations |
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| Authors: | Yasuhiro Shioya Kenji Bekki Alexandre Vazdekis |
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| Institution: | (1) Center for Interdisciplinary Research, Tohoku University, Sendai 980-8578, Japan;(2) Astronomical Institute, Tohoku University, Sendai 980-8578, Japan;(3) Institute of Astronomy, University of Tokyo, Osawa, 2-21-1, Mitaka,Tokyo, Japan |
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| Abstract: | We investigate a one-zone chemo-photometric evolutionary model of truncated spiral galaxies with and without starbursts in
order to explore the origin of the spectrophotometric properties of S0s. First, we show that 1) the tight U-V colour–magnitude (CM) relation cannot reject the model with a starburst and 2) the model with a starburst can explain the
difference in the I-K colour–magnitude relation between S0 galaxies and spiral galaxies. Next, we demonstrate how we can distinguish the truncated
spirals with a starburst from those without a starburst by using the CaII–Hδ/λ4045 diagram (proposed by Leonardi and Rose,
1996) and the 1550-V colour.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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