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Pair correlations and merger bias

Furlanetto, Steven R. and Kamionkowski, Marc (2006) Pair correlations and merger bias. Monthly Notices of the Royal Astronomical Society, 366 (2). pp. 529-536. ISSN 0035-8711.

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We analytically study the possibility that mergers of haloes are more highly clustered than the general population of haloes of comparable masses. We begin by investigating predictions for merger bias within the extended Press-Schechter formalism and discuss the limitations and ambiguities of this approach. We then postulate that mergers occur whenever two objects form within a (small) fixed distance of each other. We therefore study the clustering of pairs of points for a highly biased population in the linear regime, for the overall mass distribution in the quasi-linear regime and (using the halo model of clustering) in the non-linear regime. Biasing, quasi-linear evolution and non-linear clustering all lead to non-zero reduced (or connected) three- and four-point correlation functions. These higher order correlation functions can in many cases enhance the clustering of close pairs of points relative to the clustering of individual points. If close pairs are likely to merge, then the clustering of mergers may be enhanced. We discuss implications for the observed clustering of luminous z = 3 galaxies and for correlations of active galactic nuclei and galaxy clusters.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Kamionkowski, Marc0000-0001-7018-2055
Additional Information:© 2006 The Authors. Journal compilation © 2006 RAS. Received: 11 November 2005. Accepted: 15 November 2005. Published: 21 February 2006. We thank the referee, L. Miller, for helpful comments. This work was supported in part by DoE DE-FG03-92-ER40701 and NASA NNG05GF69G.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-92-ER40701
Subject Keywords:galaxies: formation, galaxies: interactions, large-scale structure of Universe
Issue or Number:2
Record Number:CaltechAUTHORS:20200608-110444711
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Official Citation:Steven R. Furlanetto, Marc Kamionkowski, Pair correlations and merger bias, Monthly Notices of the Royal Astronomical Society, Volume 366, Issue 2, February 2006, Pages 529–536,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103753
Deposited By: Rebecca Minjarez
Deposited On:09 Jun 2020 21:57
Last Modified:09 Jun 2020 21:57

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