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VERSION:2.0
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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20150716T103000
DTEND;TZID=Atlantic/Canary:20150716T113000
UID:iactalks-801
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/801
CREATED:2015-07-16T10:30:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Quasars as a tracer of large-scale structure at z~0.5 
DESCRIPTION:Quasars as a tracer of large-scale structure at z~0.5 \nDr. Hyu
 nmi Song\n\nWe present correlation between quasar properties and large-sca
 le density with the largest spectroscopic dataset of quasars and galaxies 
 to date. We construct a galaxy (number) density field on large-scale (~15M
 pc) using the Sloan Digital Sky Survey (SDSS) Data Release 12 (DR12) Const
 ant MASS (CMASS) galaxies following the 20 nearest-neighbors approach over
  the redshift range 0.46<z<0.59. Quasar sample is prepared from the 
 DR7 of SDSS I/II. We examine a correlation of incidence of quasars with la
 rge-scale density and dependences of quasar properties such as bolometric 
 luminosity, black hole mass, and Eddington ratio on large-scale density. W
 e find a monotonic correlation between the quasar density and large-scale 
 density, which is fitted well with a linear function in log-log space and 
 doesn't change much with redshift. The dependences of quasar properties on
  the large-scale density are detected, but these are very weak. Based on t
 he results, we discuss the possibility of using quasars as a tracer of Lar
 ge-Scale Structure (LSS), which will be crucial in the near future to go m
 ore deeply in the universe.
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