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Massive, red galaxies in a hierarchical universe - II. Clustering of Extremely Red Objects

Gonzalez-Perez, V.; Baugh, C.M.; Lacey, C.G.; Kim, J.-W.

Massive, red galaxies in a hierarchical universe - II. Clustering of Extremely Red Objects Thumbnail


Authors

V. Gonzalez-Perez

J.-W. Kim



Abstract

We present predictions for the clustering of Extremely Red Objects (EROs) in a Λ cold dark matter universe, using a semi-analytical galaxy formation model in combination with a cosmological N-body simulation. EROs are red, massive galaxies observed at 0.7 ≲z≲ 3, and their numbers and properties have posed a challenge to hierarchical galaxy formation models. We analyse the halo occupation distribution and two-point correlation function of EROs, exploring how these quantities change with apparent magnitude, colour cut and redshift. Our model predicts a halo occupation distribution that is significantly different from that typically assumed. This is due to the inclusion of active galactic nuclei (AGN) feedback, which changes the slope and scatter of the luminosity–host halo mass relation above the mass where AGN feedback first becomes important. We predict that, on average, dark matter haloes with masses above 1013 h−1 M⊙ host at least one ERO at 1.5 ≤z≤ 2.5. Taking into account sample variance in observational estimates, the predicted angular clustering for EROs with either (R−K) > 5 or (i−K) > 4.5 is in reasonable agreement with current observations.

Citation

Gonzalez-Perez, V., Baugh, C., Lacey, C., & Kim, J. (2011). Massive, red galaxies in a hierarchical universe - II. Clustering of Extremely Red Objects. Monthly Notices of the Royal Astronomical Society, 417(1), 517-531. https://doi.org/10.1111/j.1365-2966.2011.19294.x

Journal Article Type Article
Publication Date Oct 11, 2011
Deposit Date Jan 31, 2012
Publicly Available Date Mar 28, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 417
Issue 1
Pages 517-531
DOI https://doi.org/10.1111/j.1365-2966.2011.19294.x
Keywords Galaxies, Evolution galaxies, High-redshift galaxies, Luminosity function, Mass function large-scale structure of Universe.
Related Public URLs http://adsabs.harvard.edu/abs/2011MNRAS.417..517G

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Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2011 The Authors. Journal compilation © 2011 RAS. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.





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