Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Vallinotto, Alberto"'
Autor:
Vallinotto, Alberto, Linder, Eric V.
Redshift space distortions of the matter density power spectrum carry information on the growth rate of cosmic structure but require accurate modeling of nonlinear and velocity effects on the density field. We test and advance the reconstruction func
Externí odkaz:
http://arxiv.org/abs/1307.2906
Autor:
Vallinotto, Alberto
Publikováno v:
Astrophys.J.778:108,2013
The Dark Energy Survey (DES) has recently completed the Science Verification phase (SV), collecting data over 150 sq. deg. of sky. In this work we analyze to what extent it is beneficial to supplement the analysis of DES data with CMB lensing data. W
Externí odkaz:
http://arxiv.org/abs/1304.3474
Autor:
Vallinotto, Alberto
Publikováno v:
Astrophys.J.759:32,2012
Weak gravitational lensing is one of the key probes of cosmology. Cosmic shear surveys aimed at measuring the distribution of matter in the universe are currently being carried out (Pan-STARRS) or planned for the coming decade (DES, LSST, EUCLID, WFI
Externí odkaz:
http://arxiv.org/abs/1110.5339
Publikováno v:
Phys.Rev. D84 (2011) 103004
Weak lensing surveys exploit measurements of galaxy ellipticities. These measurements are subject to errors which degrade the cosmological information that can be extracted from the surveys. Here we propose a way of using the galaxy data themselves t
Externí odkaz:
http://arxiv.org/abs/1009.5590
Publikováno v:
JCAP 1203 (2012) 020
Indirect Dark Matter searches are based on the observation of secondary particles produced by the annihilation or decay of Dark Matter. Among them, gamma-rays are perhaps the most promising messengers, as they do not suffer deflection or absorption o
Externí odkaz:
http://arxiv.org/abs/1009.5107
Publikováno v:
JCAP 1011:003,2010
We perform a thorough computation of the one-loop corrections from both scalar and tensor degrees of freedom to the power spectrum of curvature fluctuations for non-canonical Lagrangians in single-field inflation. We consider models characterized by
Externí odkaz:
http://arxiv.org/abs/1006.0196
Publikováno v:
Phys.Rev.D81:103531,2010
Dark matter in the form of weakly interacting massive particles is predicted to become gravitationally captured and accumulate in stars. While the subsequent annihilations of such particles lead to the injection of energy into stellar cores, elastica
Externí odkaz:
http://arxiv.org/abs/1002.0005
Publikováno v:
Astrophys.J.718:972-980,2010
We present new analytical estimates of the large scale bias of neutral hydrogen (HI). We use a simple, non-parametric model which monotonically relates the total mass of a halo M_tot with its HI mass M_HI at zero redshift; for earlier times we assume
Externí odkaz:
http://arxiv.org/abs/0911.0041
Autor:
Seo, Hee-Jong, Dodelson, Scott, Marriner, John, Mcginnis, Dave, Stebbins, Albert, Stoughton, Chris, Vallinotto, Alberto
Publikováno v:
Astrophys.J.721:164-173,2010
Baryon acoustic oscillations (BAO) provide a robust standard ruler with which to measure the acceleration of the Universe. The BAO feature has so far been detected in optical galaxy surveys. Intensity mapping of neutral hydrogen emission with a groun
Externí odkaz:
http://arxiv.org/abs/0910.5007
Publikováno v:
Astrophys.J.735:38,2011
We expect a detectable correlation between two seemingly unrelated quantities: the four point function of the cosmic microwave background (CMB) and the amplitude of flux decrements in quasar (QSO) spectra. The amplitude of CMB convergence in a given
Externí odkaz:
http://arxiv.org/abs/0910.4125