On the Origin of S0 Stellar Populations

Details On the Origin of S0 Stellar Populations On the Origin of S0 Stellar Populations

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ap%26ss.276..823s&link_type=abstract

Astrophysics and Space Science, v. 276, Issue 2/4, p. 823-829 (2001).

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

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.

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