S0 Evolution from Archival HST Images

Details S0 Evolution from Archival HST Images S0 Evolution from Archival HST Images

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hst..prop10683s&link_type=abstract

HST Proposal ID #10683

Mathematics

Logic

Hst Proposal Id #10683 Galaxies

Scientific paper

This is an archival project to study the structural properties of S0 galaxies as a function of redshift. S0 galaxies divide into those with bulge+disk structure {classic S0's} and those composed of a pure exponential disk structure {lenticulars}. While studying the structural properties of the blue Butcher-Oemler population in distant clusters, we discovered that intermediate redshifts clusters are rich in B+D type S0's, but in nearby clusters the S0 population is dominated by lenticulars. The hypothesis to be tested is that B+D S0's are stripped of their disks at intermediate redshifts to become ellipticals, while the blue population fades into lenticulars. Secondary goals are to trace the structural parameters of the red population with redshift, compare structure parameters with morphological classifications and select candidates for kinematic studies. This study is the structural equivalent of morphological studies where the galaxy's surface brightness profile is used to classify systems rather than the Hubble scheme.

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