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Clustering of extremely red objects in Elais-N1 from the UKIDSS DXS with optical photometry from Pan-STARRS 1 and Subaru

Kim, Jae-Woo; Edge, Alastair C.; Wake, David A.; Gonzalez-Perez, Violeta; Baugh, Carlton M.; Lacey, Cedric G.*;; Yamada, Toru; Sato, Yasunori; Burgett, William S.; Chambers, Kenneth C.; Price, Paul A.; Foucaud, Sebastien; Draper, Peter; Kaiser, Nick

Clustering of extremely red objects in Elais-N1 from the UKIDSS DXS with optical photometry from Pan-STARRS 1 and Subaru Thumbnail


Authors

Jae-Woo Kim

David A. Wake

Violeta Gonzalez-Perez

Toru Yamada

Yasunori Sato

William S. Burgett

Kenneth C. Chambers

Paul A. Price

Sebastien Foucaud

Peter Draper

Nick Kaiser



Abstract

We measure the angular clustering of 33 415 extremely red objects (EROs) in the Elais-N1 field covering 5.33 deg2, which cover the redshift range z = 0.8 to 2. This sample was made by merging the UKIDSS Deep eXtragalactic Survey (DXS) with the optical Subaru and Pan-STARRS PS1 data sets. We confirm the existence of a clear break in the angular correlation function at ∼0.02° corresponding to 1 h−1 Mpc at z ∼ 1. We find that redder or brighter EROs are more clustered than bluer or fainter ones. Halo occupation distribution (HOD) model fits imply that the average mass of dark matter haloes which host EROs is over 1013 h−1 M⊙ and that EROs have a bias ranging from 2.7 to 3.5. Compared to EROs at z ∼ 1.1, at z ∼ 1.5 EROs have a higher bias and fewer are expected to be satellite galaxies. Furthermore, EROs reside in similar dark matter haloes to those that host 1011.0 M⊙ < M* < 1011.5 M⊙ galaxies. We compare our new measurement and HOD fits with the predictions of the GALFORM semi-analytical galaxy formation model. Overall, the clustering predicted by GALFORM gives an encouraging match to our results. However, compared to our deductions from the measurements, GALFORM puts EROs into lower mass haloes and predicts that a larger fraction of EROs are satellite galaxies. This suggests that the treatment of gas cooling may need to be revised in the model. Our analysis illustrates the potential of clustering analyses to provide observational constraints on theoretical models of galaxy formation.

Citation

Kim, J., Edge, A. C., Wake, D. A., Gonzalez-Perez, V., Baugh, C. M., Lacey, C. G., …Kaiser, N. (2014). Clustering of extremely red objects in Elais-N1 from the UKIDSS DXS with optical photometry from Pan-STARRS 1 and Subaru. Monthly Notices of the Royal Astronomical Society, 438(1), 825-840. https://doi.org/10.1093/mnras/stt2245

Journal Article Type Article
Publication Date Feb 11, 2014
Deposit Date Apr 4, 2014
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 438
Issue 1
Pages 825-840
DOI https://doi.org/10.1093/mnras/stt2245
Keywords Surveys, Galaxies, Evolution, Photometry cosmology, Observations, Infrared.

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Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society © 2013 The Authors
Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.





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