The age dependence of halo clustering

Details The age dependence of halo clustering The age dependence of halo clustering

2005-06-21

arxiv.org/abs/astro-ph/0506510v2

Mon.Not.Roy.Astron.Soc.363:L66-L70,2005

Astronomy and Astrophysics

Astrophysics

5 pages, 5 figures, MNRAS in press. Full resolution pdf file is avaliable at http://www.mpa-garching.mpg.de/~gaoliang/GSW.pdf

Scientific paper

10.1111/j.1745-3933.2005.00084.x

We use a very large simulation of the concordance LCDM cosmogony to study the clustering of dark matter haloes. For haloes less massive than about 1e13Msun/h, the amplitude of the two-point correlation function on large scales depends strongly on halo formation time. Haloes that assembled at high redshift are substantially more clustered than those that assembled more recently. The effect is a smooth function of halo formation time and its amplitude increases with decreasing halo mass. At 1e11 Msun/h the ``oldest'' 10% of haloes are more than 5 times more strongly correlated than the ``youngest'' 10%. This unexpected result is incompatible with the standard excursion set theory for structure growth, and it contradicts a fundamental assumption of the halo occupation distribution models often used to study galaxy clustering, namely that the galaxy content of a halo of given mass is statistically independent of its larger scale environment.

Affiliated with

Also associated with

No associations

Rating

The age dependence of halo clustering does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The age dependence of halo clustering, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The age dependence of halo clustering will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-481062