Skip to main content

The clustering of extremely red objects

Palamara, David P.; Brown, Michael J. I.; Jannuzi, Buell T.; Dey, Arjun; Stern, Daniel; Pimbblet, Kevin A.; Weiner, Benjamin J.; Ashby, Matthew L. N.; Kochanek, C. S.; Gonzalez, Anthony; Brodwin, Mark; Le Floc'h, Emeric; Rieke, Marcia


David P. Palamara

Michael J. I. Brown

Buell T. Jannuzi

Arjun Dey

Daniel Stern

Benjamin J. Weiner

Matthew L. N. Ashby

C. S. Kochanek

Anthony Gonzalez

Mark Brodwin

Emeric Le Floc'h

Marcia Rieke


We measure the clustering of extremely red objects (EROs) in 8 deg 2 of the NOAO Deep Wide Field Survey Boötes field in order to establish robust links between ERO (z 1.2) and local galaxy (z < 0.1) populations. Three different color selection criteria from the literature are analyzed to assess the consequences of using different criteria for selecting EROs. Specifically, our samples are (R-K s ) > 5.0 (28, 724 galaxies), (I-K s ) > 4.0 (22, 451 galaxies), and (I-[3.6]) > 5.0 (64, 370 galaxies). Magnitude-limited samples show the correlation length (r 0 ) to increase for more luminous EROs, implying a correlation with stellar mass. We can separate star-forming and passive ERO populations using the (K s -[24]) and ([3.6] -[24]) colors to K s = 18.4 and [3.6] = 17.5, respectively. Star-forming and passive EROs in magnitude-limited samples have different clustering properties and host dark halo masses and cannot be simply understood as a single population. Based on the clustering, we find that bright passive EROs are the likely progenitors of ≳ 4L* elliptical galaxies. Bright EROs with ongoing star formation were found to occupy denser environments than star-forming galaxies in the local universe, making these the likely progenitors of ≳ L* local ellipticals. This suggests that the progenitors of massive ≳ 4L* local ellipticals had stopped forming stars by z ≳ 1.2, but that the progenitors of less massive ellipticals (down to L*) can still show significant star formation at this epoch. © 2013. The American Astronomical Society. All rights reserved.

Journal Article Type Article
Publication Date Feb 10, 2013
Journal Astrophysical Journal
Print ISSN 0004-637X
Electronic ISSN 1538-4357
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 764
Issue 1
Article Number 31
APA6 Citation Palamara, D. P., Brown, M. J. I., Jannuzi, B. T., Dey, A., Stern, D., Pimbblet, K. A., …Rieke, M. (2013). The clustering of extremely red objects. The Astrophysical journal, 764(1),
Keywords Cosmology: observations; Galaxies: elliptical and lenticular, cD; Galaxies: evolution; Galaxies: formation; Galaxies: high-redshift; Galaxies: starburst; Galaxies: statistics; Large-scale structure of universe
Publisher URL


Article (3.5 Mb)

Copyright Statement
© 2013. The American Astronomical Society. All rights reserved. Printed in the U.S.A

You might also like

Downloadable Citations