Secondary Disks and Disk Regrowth in S0 Galaxies

Details Secondary Disks and Disk Regrowth in S0 Galaxies Secondary Disks and Disk Regrowth in S0 Galaxies

Aug 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010noao.prop..594m&link_type=abstract

NOAO Proposal ID #2010B-0594

Physics

Scientific paper

Early-type galaxies are predicted to regrow late-type disks in hierarchical models of galaxy formation, but the observational confirmation of this process remains largely indirect. We seek to approach this problem kinematically by searching for evidence of disk regrowth in the form of extended secondary disks in S0s (distinct from the small-scale KDCs identified in SAURON). In order to address the possible contribution of secondary disks not indicative of true disk regrowth and the expected variations of secondary disk frequency with mass, color, and environment, we propose deep spectroscopy of a broad sample of 60 S0 galaxies located in the RESOLVE Survey volume. With these data and similar data in hand for ~12 additional S0s, we aim both to resolve conflicting measurements of the frequency of secondary disks in early-type galaxies and to determine the incidence of disk regrowth.

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