2026-04-17T01:23:35Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1275442025-12-05T16:10:27Zcom_2072_1057col_2072_478904col_2072_478917

00925njm 22002777a 4500 dc Xia, Jun-Qing author Baccigalupi, Carlo author Matarrese, Sabino author Verde, Licia author Viel, Matteo author 2019-01-23T10:48:36Z 2019-01-23T10:48:36Z 2011 2019-01-23T10:48:36Z In this paper we measure the angular power spectra Cℓ 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 fNL = 48±20, fNL = 50±265 and fNL = 183±95 at 68% confidence level for local, equilateral and enfolded templates, respectively. Furthermore, we explore the constraint on the cubic correction gNLphgr3 on the bias of dark matter haloes and obtain a limit of −1.2 × 105 < gNL < 11.3 × 105 at 95% confidence level. Cosmologia Astrofísica Cosmology Astrophysics Constraints on primordial non-Gaussianity from large scale structure probes