Galaxy Mass Growth in GDDS and SDSS

Details Galaxy Mass Growth in GDDS and SDSS Galaxy Mass Growth in GDDS and SDSS

2008-06-24

arxiv.org/abs/0806.3795v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, proceedings of the first Subaru International Conference: "Panoramic Views of Galaxy Formation and Evoluti

Scientific paper

I present some new results related to our understanding of the masses of galaxies both in the local and high-redshift Universe. At high-redshift new Spitzer data on galaxies in the Gemini Deep Deep Survey allow us a more accurate measure of stellar mass to light ratios (using rest frame near-IR light) showing a refinement of the measurements but not great discrepancies. In the local universe a new method is explored to estimate the baryonic mass function of galaxies including contributions from unseen HI. This points to an interesting result: that the baryonic mass function of galaxies may in fact be quite steep, of comparable slope to the mass function of dark matter haloes.

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