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

doi:10.1086/427679

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 journal › Article › peer-review

Abstract

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 language	English (US)
Pages (from-to)	643-650
Number of pages	8
Journal	Astrophysical Journal
Volume	621
Issue number	2 I
DOIs	https://doi.org/10.1086/427679
State	Published - Mar 10 2005

Keywords

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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10.1086/427679

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title = "The mass function of void galaxies in the sloan digital sky survey data release 2",

abstract = "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-S{\'e}rsic 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.",

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AU - Goldberg, David M.

AU - Jones, Timothy D.

AU - Hoyle, Fiona

AU - Rojas, Randall R.

AU - Vogeley, Michael S.

AU - Blanton, Michael R.

PY - 2005/3/10

Y1 - 2005/3/10

N2 - 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.

AB - 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.

KW - Cosmology: theory

KW - Galaxies: luminosity function

KW - Mass function large-scale structure of universe

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

Abstract

Keywords

ASJC Scopus subject areas

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