J.L. Tinker
The correlated formation histories of massive galaxies and their dark matter halos
Tinker, J.L.; George, M.R.; Leauthaud, A.; Bundy, K.; Finoguenov, A.; Massey, R.; Rhodes, J.; Wechsler, R.H.
Authors
M.R. George
A. Leauthaud
K. Bundy
A. Finoguenov
Professor Richard Massey r.j.massey@durham.ac.uk
Professor
J. Rhodes
R.H. Wechsler
Abstract
Using observations in the COSMOS field, we report an intriguing correlation between the star formation activity of massive (~1011.4 M ☉) central galaxies, their stellar masses, and the large-scale (~10 Mpc) environments of their group-mass (~1013.6 M ☉) dark matter halos. Probing the redshift range z = [0.2, 1.0], our measurements come from two independent sources: an X-ray-detected group catalog and constraints on the stellar-to-halo mass relation derived from a combination of clustering and weak lensing statistics. At z = 1, we find that the stellar mass in star-forming (SF) centrals is a factor of two less than in passive centrals at the same halo mass. This implies that the presence or lack of star formation in group-scale centrals cannot be a stochastic process. By z = 0, the offset reverses, probably as a result of the different growth rates of these objects. A similar but weaker trend is observed when dividing the sample by morphology rather than star formation. Remarkably, we find that SF centrals at z ~ 1 live in groups that are significantly more clustered on 10 Mpc scales than similar mass groups hosting passive centrals. We discuss this signal in the context of halo assembly and recent simulations, suggesting that SF centrals prefer halos with higher angular momentum and/or formation histories with more recent growth; such halos are known to evolve in denser large-scale environments. If confirmed, this would be evidence of an early established link between the assembly history of halos on large scales and the future properties of the galaxies that form inside them.
Citation
Tinker, J., George, M., Leauthaud, A., Bundy, K., Finoguenov, A., Massey, R., …Wechsler, R. (2012). The correlated formation histories of massive galaxies and their dark matter halos. Astrophysical Journal Letters, 755(1), Article L5. https://doi.org/10.1088/2041-8205/755/1/l5
Journal Article Type | Article |
---|---|
Publication Date | Aug 10, 2012 |
Deposit Date | Mar 21, 2013 |
Publicly Available Date | Feb 12, 2015 |
Journal | Astrophysical Journal Letters |
Print ISSN | 2041-8205 |
Electronic ISSN | 2041-8213 |
Publisher | American Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 755 |
Issue | 1 |
Article Number | L5 |
DOI | https://doi.org/10.1088/2041-8205/755/1/l5 |
Keywords | Cosmology: observations, Galaxies: groups: general, Galaxies: halos. |
Files
Published Journal Article
(282 Kb)
PDF
Copyright Statement
© 2012. The American Astronomical Society. All rights reserved.
You might also like
Scanning for dark matter subhaloes in Hubble Space Telescope imaging of 54 strong lenses
(2023)
Journal Article
Data Downloaded via Parachute from a NASA Super-Pressure Balloon
(2023)
Journal Article
A Recent Impact Origin of Saturn’s Rings and Mid-sized Moons
(2023)
Journal Article
RXJ0437+00: constraining dark matter with exotic gravitational lenses
(2023)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search