Starbursts Versus Stripping: Where Is The Gas In Groups Of Galaxies?

Details Starbursts Versus Stripping: Where Is The Gas In Groups Of Galaxies? Starbursts Versus Stripping: Where Is The Gas In Groups Of Galaxies?

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21933828r&link_type=abstract

American Astronomical Society, AAS Meeting #219, #338.28

Astronomy and Astrophysics

Astronomy

Scientific paper

We are testing the hypothesis that cool gas is missing in groups of galaxies because it has turned into stars, as opposed to being stripped out of the galaxies by tidal forces or a hot intragroup plasma. To do this, we are examining the properties of galaxies that have been observed using the Sloan Digital Sky Survey (SDSS), the ALFALFA radio survey, and the Spitzer Space Telescope. This combined data set allows us to estimate the amount of "missing” loose gas, the mass in stars, the total mass, and the current star formation rate in each galaxy. We have developed a procedure and accompanying Interactive Data Language (IDL) application to scan known or suspected groups of galaxies. The application reads from the Arecibo General Catalog, automatically queries the online SDSS catalog, selects galaxies for group membership, and calculates the local density near each galaxy.

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