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Preprint
The Mass Function of Void Galaxies in the SDSS Data Release 2
ArXiv.org
23 Jun 2004
Abstract
Astrophys.J. 621 (2005) 643-650 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 of delta_v < -0.6. The galaxy sample is split into
ellipticals and spirals using a color-Sersic index criteria. 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.
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Details
- Title
- The Mass Function of Void Galaxies in the SDSS Data Release 2
- Creators
- David M Goldberg - DrexelTimothy D Jones - DrexelFiona Hoyle - DrexelRandall R Rojas - DrexelMichael S Vogeley - DrexelMichael R Blanton - NYU
- Publication Details
- ArXiv.org
- Resource Type
- Preprint
- Language
- English
- Academic Unit
- Physics
- Other Identifier
- 991021864947804721