Galaxies and their Host Environments: What we have learned from the Sloan Digital Sky Survey
New York University
Wed. February 8, 2006 1:00 PM Stirling C|
For decades, we have known that the galaxy population in
dense regions, such as galaxy clusters, differs from that
in the field, known as the morphology-density relationship.
With new, large redshift surveys, we can ask revealing
questions about this relationship that were not previously
possible to answer. Here I address some of these questions
and try to relate them to theories of galaxy formation.
I show first that galaxy properties are related most closely
to the masses of the groups to which they belong, not to
the larger scale density field. Second, I show that the
galaxy properties most directly affected are those related
to the star-formation history: the color and luminosity.
Other properties, such as the structure and size of a galaxy,
are unrelated to environment for galaxies of similar
|Refreshments will precede the talk at 12:30pm.|
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