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DTSTART;TZID=UTC:20201015T160000
DTEND;TZID=UTC:20201015T170000
DTSTAMP:20260421T112016
CREATED:20200918T182625Z
LAST-MODIFIED:20201012T221304Z
UID:1526-1602777600-1602781200@rpm.physics.lbl.gov
SUMMARY:Andrej Obuljen (Waterloo) "Anisotropic Assembly Bias in Theory\, Simulations and BOSS Data"
DESCRIPTION:ABSTRACT\nClustering of matter on large scales provides an important source of information on key cosmological parameters. To extract this information we need to understand the relation between the tracers we observe and the underlying matter field. The clustering strength of halos and galaxies on large scales is linearly biased compared to the matter clustering. This linear bias mainly depends on halo mass and redshifts\, though selections based on other scalar halo properties (age\, spin\, concentration etc.) show additional bias dependences — called assembly bias. Furthermore\, non-scalar halo properties: shapes\, velocity dispersion and angular momentum\, are correlated with the large-scale tidal field. Selection effects that couple to these non-scalar halo properties can produce anisotropic clustering even in real-space and act as a contaminant to redshift-space distortion measurements\, through an anisotropic assembly bias (AB). I will discuss our recent results on studying the halo AB using a large number of numerical simulations. Then I will present the first detection of the galaxy anisotropic assembly bias in BOSS DR12 galaxies. Finally\, I will show other consequences and future prospects. \nhttp://physics.lbl.gov/rpm/index.php/events/\nIf you are looking to confirm if there is an event\, due to room reservation\, please go to RPM website for a list of all scheduled talks.\n──────────\nTroy Cortez is inviting you to a scheduled Zoom meeting. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/91782268585 \nMeeting ID: 917 8226 8585\nOne tap mobile\n+16699006833\,\,91782268585# US (San Jose)\n+13462487799\,\,91782268585# US (Houston) \nDial by your location\n+1 669 900 6833 US (San Jose)\n+1 346 248 7799 US (Houston)\n+1 253 215 8782 US (Tacoma)\n+1 646 558 8656 US (New York)\n+1 301 715 8592 US (Germantown)\n+1 312 626 6799 US (Chicago)\nMeeting ID: 917 8226 8585\nFind your local number: https://lbnl.zoom.us/u/abeLb1T4q1 \nJoin by SIP\n91782268585@zoomcrc.com \nJoin by H.323\n162.255.37.11 (US West)\n162.255.36.11 (US East)\n115.114.131.7 (India Mumbai)\n115.114.115.7 (India Hyderabad)\n213.19.144.110 (EMEA)\n103.122.166.55 (Australia)\n64.211.144.160 (Brazil)\n69.174.57.160 (Canada)\n207.226.132.110 (Japan)\nMeeting ID: 917 8226 8585 \n──────────
URL:https://rpm.physics.lbl.gov/event/andrej-obuljen-waterloo/
LOCATION:Zoom Talk\, 50A-5132\, Berkeley\, ca\, 94720
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