Spheroidal Galaxy Evolution

Details Spheroidal Galaxy Evolution Spheroidal Galaxy Evolution

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7523b&link_type=abstract

HST Proposal ID #7523

Physics

Hst Proposal Id #7523 Cosmology

Scientific paper

We propose to use archival WFPC2 images for exploring the evolution of spheroidal galaxies. The deep field V and I pointings deserve special attention, being faint enough and of sufficient angular resolution for detecting young early-type galaxies when hot stars should populate the upper main- sequence. Our analysis of the Hubble Deep Field {HDF} field demonstrates the existence of a tight track in the color- magnitude plane for de Vaucouleurs profile galaxies, extending from moderate redshift red colors to the bright blue early stages, consistent with a passively evolving population. With more fields from the archive we can constrain the density evolution all along the sequence and define better their spread in age.

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