Mathematics – Logic
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21742103b&link_type=abstract
American Astronomical Society, AAS Meeting #217, #421.03; Bulletin of the American Astronomical Society, Vol. 43, 2011
Mathematics
Logic
Scientific paper
The morphology-density relation, or the tendency for dense environments to host early type galaxies with little star formation, extends not only to cluster galaxies, but to all environments including the "field." Thus, clues about the evolution of galaxies can be found in both clusters and in the simplest environments, smal groupings. Using cosmological simulations as a guide, my collaborators and I have developed techniques to measure the properties of galaxies in very sparse systems. We use the Sloan Digital Sky Survey to develop an understanding of processes that remove fuel and suppress star formation in satellite galaxies in these systems, like quenching and "strangulation." Approaching this problem from a different angle, we extend the technique of detecting absorption lines in the spectra of background quasars to study the relationship between low-density gas in the outer halos of galaxies and the environmental and star-forming properties of the galaxies themselves.
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