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Monthly Notices of the Royal Astronomical Society
Article . 2013 . Peer-reviewed
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https://dx.doi.org/10.25916/su...
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https://dx.doi.org/10.48550/ar...
Article . 2012
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Article . 2015
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The 6dF Galaxy Survey: dependence of halo occupation on stellar mass

Authors: Beutler, Florian; Blake, Chris; Colless, Matthew; Jones, D. Heath; Staveley-Smith, Lister; Campbell, Lachlan; Parker, Quentin; +2 Authors

The 6dF Galaxy Survey: dependence of halo occupation on stellar mass

Abstract

In this paper we study the stellar mass dependence of galaxy clustering in the 6dF Galaxy Survey (6dFGS). The near-infrared selection of 6dFGS allows more reliable stellar mass estimates compared to optical bands used in other galaxy surveys. Using the halo occupation distribution model, we investigate the trend of dark matter halo mass and satellite fraction with stellar mass by measuring the projected correlation function, wp(rp). We find that the typical halo mass (M1) as well as the satellite power-law index (α) increases with stellar mass. This indicates (1) that galaxies with higher stellar mass sit in more massive dark matter haloes and (2) that these more massive dark matter haloes accumulate satellites faster with growing mass compared to haloes occupied by low stellar mass galaxies. Furthermore, we find a relation between M1 and the minimum dark matter halo mass (Mmin) of M1 ≈ 22 Mmin, in agreement with similar findings for Sloan Digital Sky Survey galaxies. The satellite fraction of 6dFGS galaxies declines with increasing stellar mass from 21 per cent at Mstellar = 2.6 × 1010 h−2 M⊙ to 12 per cent at Mstellar = 5.4 × 1010 h−2 M⊙ indicating that high stellar mass galaxies are more likely to be central galaxies. We compare our results to two different semi-analytic models derived from the Millennium Simulation, finding some disagreement. Our results can be used for placing new constraints on semi-analytic models in the future, particularly the behaviour of luminous red satellites. Finally, we compare our results to studies of halo occupation using galaxy–galaxy weak lensing. We find good overall agreement, representing a valuable cross-check for these two different tools of studying the matter distribution in the Universe.

Countries
United Kingdom, Australia, China (People's Republic of), Australia
Keywords

large-scale structure of the Universe, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Surveys-Galaxies, Formation-Galaxies, FOS: Physical sciences, 520, Haloes-Galaxies, galaxies: haloes, surveys, Statistics-Cosmology, astro-ph.CO, cosmology: obervations, galaxies: formation, Keywords: Formation-Galaxies, galaxies: statistics, Observations-Large-scale structure of the Universe, Astrophysics - Cosmology and Nongalactic Astrophysics

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    influence
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
27
Top 10%
Top 10%
Top 10%
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gold