Mass functions and bias of dark matter halos

Details Mass functions and bias of dark matter halos Mass functions and bias of dark matter halos

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1241.1164v&link_type=abstract

INVISIBLE UNIVERSE: Proceedings of the Conference. AIP Conference Proceedings, Volume 1241, pp. 1164-1173 (2010).

Mathematics

Functional Analysis

Dark Matter, Galaxies, Redshift, Functional Analysis, Dark Matter, Galactic Halo, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Functional Analysis

Scientific paper

We report on some results on the mass function and the bias of dark matter halos. Focusing on the limit of rare massive halos, we point out that exact analytical results can be obtained for the large-mass tail of the halo mass function. This is most easily seen from a steepest-descent approach, that becomes asymptotically exact for rare events. We also revisit the traditional derivation of the bias of massive halos, associated with overdense regions in the primordial density field, paying attention to the Lagrangian-Eulerian mapping (i.e. corrections associated with the motions of halos). This allows us to improve the standard analytical formula for the bias of massive halos without introducing any free parameter. Next, we briefly note that this approach can be extended to non-Gaussian initial conditions. We again obtain a good agreement with numerical simulations. Moreover, the nonlinear real-space expression we obtain for the halo correlation clearly shows how the baryon acoustic oscillation at ~100 h-1 Mpc is amplified by the bias of massive halos and modified by primordial non-Gaussianity. At smaller scales, 30

Affiliated with

Also associated with

No associations

Rating

Mass functions and bias of dark matter halos 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 Mass functions and bias of dark matter halos, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mass functions and bias of dark matter halos will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1346769