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Luminosity bias : from haloes to galaxies.

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


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.

Item Type:Article
Keywords:Dark energy, Galaxies: formation, Large-scale structure of Universe.
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Publisher statement:© Astronomical Society of Australia 2013; published by Cambridge University Press.
Date accepted:No date available
Date deposited:14 August 2014
Date of first online publication:January 2013
Date first made open access:No date available

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