Constraints on primordial non-Gaussianity from large scale structure probes
- Scuola Internazionale Superiore di Studi Avanzati, Via Bonomea 265, I-34136 Trieste (Italy)
- Dipartimento di Fisica ''G. Galilei'', Università di Padova, Via Marzolo 8, I-35131 Padova (Italy)
- ICREA (Institució Catalana de Recerca i Estudis Avançats) and Instituto de Ciencias del Cosmos, (ICC-UB-IEEC) Universidad de Barcelona, Marti i Franques 1, 08028, Barcelona (Spain)
- INAF-Osservatorio Astronomico di Trieste, Via G.B. Tiepolo 11, I-34131 Trieste (Italy)
In this paper we measure the angular power spectra C{sub 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{sub NL} = 48±20, f{sub NL} = 50±265 and f{sub NL} = 183±95 at 68% confidence level for local, equilateral and enfolded templates, respectively. Furthermore, we explore the constraint on the cubic correction g{sub NL}φ{sup 3} on the bias of dark matter haloes and obtain a limit of −1.2 × 10{sup 5} < g{sub NL} < 11.3 × 10{sup 5} at 95% confidence level.
- OSTI ID:
- 22277818
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2011, Issue 08; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
Similar Records
PRIMORDIAL NON-GAUSSIANITY AND THE NRAO VLA SKY SURVEY
Tomography of the Fermi-lat γ-ray diffuse extragalactic signal via cross correlations with galaxy catalogs