The origin of S0 disks in the dense cluster environment

Details The origin of S0 disks in the dense cluster environment The origin of S0 disks in the dense cluster environment

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009noao.prop..140l&link_type=abstract

NOAO Proposal ID #2009A-0140

Physics

Scientific paper

Various mechanisms have been proposed to account for the large population of S0 galaxies observed in the cores of local rich clusters. While the transformation of a spiral into an S0 via star formation quenching is the favoured model, the mechanism for removal or exhaustion of gas is not known. Stellar population studies of S0s are a powerful diagnostic tool to investigate such mechanisms. While most S0s in rich clusters are found to contain predominantly old stars, some younger ( 2 Gyr) S0s have been identified. However such studies have been largely limited to measuring the cores of S0s which are dominated by the bulge light. Here we propose deep, long-slit GMOS spectroscopy of 12 edge-on S0s in the Coma cluster in order to determine the age, metallicity and [alpha/Fe] of both their bulges and their disks, in order to investigate the S0 formation process.

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