The mass function of void galaxies in the sloan digital sky survey data release 2

David M. Goldberg, Timothy D. Jones, Fiona Hoyle, Randall R. Rojas, Michael S. Vogeley, Michael R. Blanton

    Research output: Contribution to journalArticlepeer-review


    We estimate the mass function of void galaxies in the second public data release of the Sloan Digital Sky Survey from a sample of 1000 galaxies with local density contrasts δν < -0.6. The galaxy sample is split into ellipticals and spirals using a color-Sérsic index criterion. We estimate the virial masses of ellipticals using the measured spectral line widths along with the observed size. Projection effects and uncertainties in halo properties make mass estimates of spirals more difficult. We use an inversion of the Tully-Fisher relation to estimate the isothermal rotational velocity and introduce a scaling factor to estimate the halo extent. We then fit the measured mass function against a theoretical Press-Schechter model and find that the distribution of galaxies in voids appears to be nearly unbiased compared to the mass.

    Original languageEnglish (US)
    Pages (from-to)643-650
    Number of pages8
    JournalAstrophysical Journal
    Issue number2 I
    StatePublished - Mar 10 2005


    • Cosmology: theory
    • Galaxies: luminosity function
    • Mass function large-scale structure of universe

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science


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