The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 42 Issue 1
- /
- Pages.53.3-53.3
- /
- 2017
- /
- 1226-2692(pISSN)
Constraining primordial non-Gaussianity with the 3-point correlation function of the SDSS-IV eBOSS DR14 quasar sample
- Choi, Peter D. (Sejong University) ;
- Rossi, Graziano (Sejong University) ;
- Slepian, Zachary (Lawrence Berkeley National Laboratory) ;
- Eisenstein, Daniel (Harvard-Smithsonian Center for Astrophysics) ;
- Ho, Shirley (Lawrence Berkeley National Laboratory) ;
- Schlegel, David (Lawrence Berkeley National Laboratory)
- Published : 2017.04.10
Abstract
While quasars are sparse in number density, they reside at relatively high-redshift as compared to galaxies. Hence, they are likely to be less non-linearly evolved than the galaxy population, and thus have a distribution that more closely mirrors the primordial density field. Therefore, they offer an intriguing opportunity to search for primordial non-Gaussianity (PNG). To this end, the 3-point correlation function (3PCF) is an excellent statistical tool to detect departures from Gaussianity, vanishing for a Gaussian field. In this work, we will make the first-ever measurement of the large-scale quasar 3PCF from the SDSS-IV DR14 quasar sample (spanning the largest volume to-date) to place constraints on PNG through the usual f_NL-type parametrization. This work will use the order N^2-time 3PCF algorithm of Slepian & Eisenstein (2015), with N the number of objects.
Keywords