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DTSTART;TZID=America/Los_Angeles:20170526T120000
DTEND;TZID=America/Los_Angeles:20170526T130000
DTSTAMP:20260527T224345
CREATED:20170329T170324Z
LAST-MODIFIED:20170428T170154Z
UID:212-1495800000-1495803600@inpa.lbl.gov
SUMMARY:Titouan Lazeyras (MPA) - Dark matter halo bias from separate universe sim-ulations
DESCRIPTION:The large-scale local bias parameters of dark matter halos are essential to\ndescribe the statistics of halos and galaxies on large scales\, as well as for\nthe halo model of the matter distribution. Using so-called separate universe\nsimulations\, we recently obtained precise measurements of the three leading\nbias parameters. For b2 and b3\, these are the most precise measurements\nto date. We compare our results with bias parameters obtained from two\nand three points cross-correlation functions and with theoretical predictions\nfrom the excursion set peaks (ESP) model.\nUsing the same set of simulations\, we further investigate halo assembly bias\,\ni.e. the dependence of the halo bias on properties other than the halo mass.\nWe focus on four halo properties : halo concentration\, spin\, ellipticity and\nmass accretion rate. We measure assembly bias for b1 and nd good agree-\nment with previous studies. Furthermore\, we present results for assembly\nbias in b2 which are among the rst ones and most precise to date. To try\nand better understand the physical mechanisms behind assembly bias\, we\nalso look at the joint dependence of bias on two halo properties in addition\nto the mass.
URL:https://inpa.lbl.gov/event/titouan-lazeyras-mpa/
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