We report new constraints on the reheating temperature of the universe by analyzing the recent cosmic microwave background (CMB) data from the WMAP five year survey. From WMAP-5 data alone we found an upper limit at 95% c.l. of Trh > 2 MeV, while including external priors from the SDSS red luminous galaxy survey and age constraints improves the limit to Trh > 3.2 MeV (again at 95% c.l.). Future analysis from combined CMB and weak lensing surveys as Planck and DUNE will improve the the constraints by a factor ∼2. We test the stability of the current upper limits on neutrino masses from cosmology under the hypothesis of non-standard thermal neutrino background. © 2008 Elsevier B.V. All rights reserved.
New constraints on the reheating temperature of the universe after WMAP-5 / Melchiorri, Alessandro; DE BERNARDIS, Francesco; Pagano, Luca. - In: ASTROPARTICLE PHYSICS. - ISSN 0927-6505. - 30:4(2008), pp. 192-195. [10.1016/j.astropartphys.2008.09.005]
New constraints on the reheating temperature of the universe after WMAP-5
MELCHIORRI, Alessandro;DE BERNARDIS, FRANCESCO;PAGANO, LUCA
2008
Abstract
We report new constraints on the reheating temperature of the universe by analyzing the recent cosmic microwave background (CMB) data from the WMAP five year survey. From WMAP-5 data alone we found an upper limit at 95% c.l. of Trh > 2 MeV, while including external priors from the SDSS red luminous galaxy survey and age constraints improves the limit to Trh > 3.2 MeV (again at 95% c.l.). Future analysis from combined CMB and weak lensing surveys as Planck and DUNE will improve the the constraints by a factor ∼2. We test the stability of the current upper limits on neutrino masses from cosmology under the hypothesis of non-standard thermal neutrino background. © 2008 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
