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Luminosity bias: from haloes to galaxies

Baugh, C.M.

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Large surveys of the local Universe have shown that galaxies with different intrinsic properties such as colour, luminosity and morphological type display a range of clustering amplitudes. Galaxies are therefore not faithful tracers of the underlying matter distribution. This modulation of galaxy clustering, called bias, contains information about the physics behind galaxy formation. It is also a systematic to be overcome before the large-scale structure of the Universe can be used as a cosmological probe. Two types of approaches have been developed to model the clustering of galaxies. The first class is empirical and filters or weights the distribution of dark matter to reproduce the measured clustering. In the second approach, an attempt is made to model the physics which governs the fate of baryons in order to predict the number of galaxies in dark matter haloes. I will review the development of both approaches and summarise what we have learnt about galaxy bias.


Baugh, C. (2013). Luminosity bias: from haloes to galaxies. Publications of the Astronomical Society of Australia, 30, Article e030.

Journal Article Type Article
Publication Date Jan 1, 2013
Deposit Date Mar 27, 2013
Publicly Available Date Aug 14, 2014
Journal Publications of the Astronomical Society of Australia
Print ISSN 1323-3580
Electronic ISSN 1448-6083
Publisher Cambridge University Press
Peer Reviewed Peer Reviewed
Volume 30
Article Number e030
Keywords Dark energy, Galaxies: formation, Large-scale structure of Universe.


Published Journal Article (830 Kb)

Copyright Statement
© Astronomical Society of Australia 2013; published by Cambridge University Press.

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