Testing hierarchical formation models of elliptical cluster galaxies

Details Testing hierarchical formation models of elliptical cluster galaxies Testing hierarchical formation models of elliptical cluster galaxies

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop..165h&link_type=abstract

NOAO Proposal ID #2007B-0165

Physics

Scientific paper

Recent measurements of the stellar mass functions of field galaxies are in conflict with the predictions from the latest generation of hierarchical semi-analytic models of galaxy formation, in which typical elliptical galaxies in the local universe are expected to have built up 50% of their stellar mass by z 0.8. However, studies in the field do not probe cluster-scale densities, where merging is expected to be the dominant process driving the build-up of spheroids in the hierarchical models. We propose to conduct a systematic study of the evolution of the stellar mass function in a sample of 26 X-ray selected clusters located at 0.8 < z < 1.5. In conjuction with proposed MOIRCS J, K-band observations (title: 'Testing hierarchical formation models of brightest cluster galaxies'), the requested GMOS photometry will be used to determine cluster membership and measure stellar masses using stellar population synthesis techniques.

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