The Tully-fisher Relation For 25,000 SDSS Galaxies As Function Of Environment

Details The Tully-fisher Relation For 25,000 SDSS Galaxies As Function Of Environment The Tully-fisher Relation For 25,000 SDSS Galaxies As Function Of Environment

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934606m&link_type=abstract

American Astronomical Society, AAS Meeting #219, #346.06

Statistics

Methodology

Scientific paper

We construct Tully-Fisher relationships (TFRs) in the u, g, r, i and z bands and stellar mass TFRs (smTFRs) for a sample of 25,698 galaxies (with 0.0450.045) the fibres sample enough of the disc to obtain a linear relationship between v_FWHM and v_circ, allowing us to obtain a TFR and to investigate dependence on other variables. We also develop a methodology for distinguishing between astrophysical and sample bias in the fibre TFR trends. We observe the well-known steepening of the TFR in redder bands in our sample. We divide the sample of galaxies into four equal groups using projected neighbour density (Sigma) quartiles and find no significant dependence on environment. Having demonstrated that we can construct SDSS-based TFRs is very useful for future applications because of the large sample size available.

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