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

the halo occupation distribution 1 • Statistical prescription for the connection between N gal 1. galaxies and dark matter 0. halos: P(N|M) • Specifying HOD provides Halo Mass full description of galaxy spatial distribution. • Can constrain the HOD from observational clustering data. subhalos

Deconstructing galaxy clustering clustering measurements SDSS DR7, M r <-21 galaxies. Pairs inside natural transition of 1 halo. scale 1- halo 2- halo Pairs between 2 halos. See, i.e., Zehavi et al 2004 for DR2 results Zehavi et al 2011 for DR7 results

Deconstructing galaxy clustering Transition more apparent at clustering measurements SDSS DR7, M r <-21 galaxies. high redshift Tinker, Wechsler, Zheng 2010 natural transition scale 1- halo 2- halo See, i.e., Zehavi et al 2004 for DR2 results Zehavi et al 2011 for DR7 results

Deconstructing galaxy clustering Use the data to constrain clustering measurements SDSS DR7, M r <-21 galaxies. this galaxy-halo relation natural transition scale 1- Text halo 2- halo See, i.e., Zehavi et al 2004 for DR2 results Zehavi et al 2011 for DR7 results