publication . Article . Preprint . 2014

Constraints on Primordial Non-Gaussianity from800 000Photometric Quasars

Boris Leistedt; Hiranya V. Peiris; Nina Roth;
Open Access
  • Published: 16 May 2014 Journal: Physical Review Letters, volume 113 (issn: 0031-9007, eissn: 1079-7114, Copyright policy)
  • Publisher: American Physical Society (APS)
Abstract
We derive robust constraints on primordial non-Gaussianity (PNG) using the clustering of 800,000 photometric quasars from the Sloan Digital Sky Survey in the redshift range $0.5<z<3.5$. These measurements rely on the novel technique of {\it extended mode projection} to control the impact of spatially-varying systematics in a robust fashion, making use of blind analysis techniques. This allows the accurate measurement of quasar halo bias at the largest scales, while discarding as little as possible of the data. The standard local-type PNG parameters $f_\mathrm{NL}$ and $g_\mathrm{NL}$ both imprint a $k^{-2}$ scale-dependent effect in the bias. Constraining these ...
Persistent Identifiers
Subjects
arXiv: Astrophysics::Cosmology and Extragalactic Astrophysics
free text keywords: Astrophysics - Cosmology and Nongalactic Astrophysics, Cosmic microwave background, Astrophysics, Redshift, Supercluster, Observational cosmology, Dark matter halo, Quasar, Physics, Population, education.field_of_study, education, Dark matter
Funded by
EC| COSMICDAWN
Project
COSMICDAWN
Understanding the Origin of Cosmic Structure
  • Funder: European Commission (EC)
  • Project Code: 306478
  • Funding stream: FP7 | SP2 | ERC
76 references, page 1 of 6

Electronic address: boris.leistedt.11@ucl.ac.uk

z Electronic address: n.roth@ucl.ac.uk [1] T. J. Allen, B. Grinstein, and M. B. Wise, Physics Letters

B 197, 66 (1987). [2] D. S. Salopek and J. R. Bond, Phys. Rev. D 42, 3936

(1990). [3] T. Falk, R. Rangarajan, and M. Srednicki, Astrophys. J.

Lett. 403, L1 (1993), astro-ph/9208001. [4] A. Gangui, F. Lucchin, S. Matarrese, and S. Mollerach,

Astrophys. J. 430, 447 (1994), astro-ph/9312033. [5] L. Verde, L. Wang, A. F. Heavens, and

313, 141 (2000), astro-ph/9906301. [6] L. Wang and M. Kamionkowski, Phys. Rev. D 61,

063504 (2000), astro-ph/9907431. [7] A. Gangui and J. Martin, Mon. Not. Roy. Astron. Soc.

313, 323 (2000), astro-ph/9908009. [8] E. Komatsu and D. N. Spergel, Phys. Rev. D 63, 063002

(2001), astro-ph/0005036. [9] J. Maldacena, Journal of High Energy Physics 5, 013

(2003), astro-ph/0210603. [10] V. Acquaviva, N. Bartolo, S. Matarrese, and A. Riotto, [OpenAIRE]

Nuclear Physics B 667, 119 (2003), astro-ph/0209156. [11] D. Babich, P. Creminelli, and M. Zaldarriaga, Journal

of Cosmology and Astroparticle Physics 8, 009 (2004),

astro-ph/0405356. [12] N. Bartolo, E. Komatsu, S. Matarrese, and A. Riotto,

Physics Reports 402, 103 (2004), astro-ph/0406398. [13] Planck Collaboration, ArXiv e-prints (2013), 1303.5084. [14] J. Smidt, A. Amblard, C. T. Byrnes, A. Cooray, A. Heav-

76 references, page 1 of 6
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