Year: 2011
Type: article
Abstract: In this paper we measure the angular power spectra C ℓ of three high-redshift large-scale structure probes: the radio sources from the NRAO VLA Sky Survey (NVSS), the quasar catalogue of Sloan Digital Sky Survey Release Six (SDSS DR6 QSOs) and the MegaZ-LRG (DR7), the final SDSS II Luminous Red Galaxy (LRG) photometric redshift survey. We perform a global analysis of the constraints on the amplitude of primordial non-Gaussianity from these angular power spectra, as well as from their cross-correlation power spectra with the cosmic microwave background (CMB) temperature map. In particular, we include non-Gaussianity of the type arising from single-field slow roll, multifields, curvaton (local type), and those which effects on the halo clustering can be described by the equilateral template (related to higher-order derivative type non-Gaussianity) and by the enfolded template (related to modified initial state or higher-derivative interactions). When combining all data sets, we obtain limits of f NL = 48±20, f NL = 50±265 and f NL = 183±95 at 68% confidence level for local, equilateral and enfolded templates, respectively. Furthermore, we explore the constraint on the cubic correction g NL ϕ 3 on the bias of dark matter haloes and obtain a limit of −1.2 × 10 5 < g NL < 11.3 × 10 5 at 95% confidence level.
Authors: Jun-Qing Xia, Carlo Baccigalupi, Sabino Matarrese, Licia Verde, Matteo Viel
Institutions: Scuola Internazionale Superiore di Studi Avanzati, Istituto Nazionale di Fisica Nucleare, Trieste Astronomical Observatory, Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, University of Padua, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, Institució Catalana de Recerca i Estudis Avançats, Universitat de Barcelona
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, Alfred P. Sloan Foundation, Princeton University, Ohio State University, University of Washington, Johns Hopkins University, University of Pittsburgh, Case Western Reserve University, Drexel University, Universität Basel, University of Portsmouth, New Mexico State University, Chinese Academy of Sciences, Ministero dell’Istruzione, dell’Università e della Ricerca, Max-Planck-Gesellschaft, Ministerio de Ciencia e Innovación, Max-Planck-Institut für Astronomie, U.S. Naval Observatory, Fermilab, Los Alamos National Laboratory
Awards: G6257683263, G7447016468
OpenAlex ID: W1975529033