the halo occupation distribution 1 Statistical prescription for - - PowerPoint PPT Presentation

the halo occupation distribution

Halo Mass Ngal 0. 1. 1

• Statistical prescription for

the connection between galaxies and dark matter halos: P(N|M)

• Specifying HOD provides

full description of galaxy spatial distribution.

• Can constrain the HOD

from observational clustering data.

subhalos

Deconstructing galaxy clustering

1- halo 2- halo natural transition scale

See, i.e., Zehavi et al 2004 for DR2 results Zehavi et al 2011 for DR7 results

Pairs between 2 halos. Pairs inside

• f 1 halo.

clustering measurements SDSS DR7, Mr<-21 galaxies.

Deconstructing galaxy clustering

clustering measurements SDSS DR7, Mr<-21 galaxies.

1- halo 2- halo natural transition scale

See, i.e., Zehavi et al 2004 for DR2 results Zehavi et al 2011 for DR7 results

Transition more apparent at high redshift

Tinker, Wechsler, Zheng 2010

Deconstructing galaxy clustering

clustering measurements SDSS DR7, Mr<-21 galaxies.

1- halo 2- halo natural transition scale

See, i.e., Zehavi et al 2004 for DR2 results Zehavi et al 2011 for DR7 results

Use the data to constrain this galaxy-halo relation Text