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Astrophysics

Title: OVRO CMB Anisotropy Measurement Constraints on Flat-Lambda and Open CDM Cosmogonies

Abstract: We use Owens Valley Radio Observatory (OVRO) cosmic microwave background (CMB) anisotropy data to constrain cosmological parameters. We account for the OVRO beamwidth and calibration uncertainties, as well as the uncertainty induced by the removal of non-CMB foreground contamination. We consider open and spatially-flat-Lambda cold dark matter cosmogonies, with nonrelativistic-mass density parameter Omega_0 in the range 0.1--1, baryonic-mass density parameter Omega_B in the range (0.005--0.029)h^{-2}, and age of the universe t_0 in the range (10--20) Gyr. Marginalizing over all parameters but Omega_0, the OVRO data favors an open (spatially-flat-Lambda) model with Omega_0 ~= 0.33 (0.1). At the 2 sigma confidence level model normalizations deduced from the OVRO data are mostly consistent with those deduced from the DMR, UCSB South Pole 1994, Python I-III, ARGO, MAX 4 and 5, White Dish, and SuZIE data sets.
Comments: 14 pages, 3 figures
Subjects: Astrophysics (astro-ph)
Journal reference: Mod.Phys.Lett. A18 (2003) 1145-1156
Cite as: arXiv:astro-ph/0208216v1

Submission history

From: Pia Mukherjee [view email]
[v1] Sat, 10 Aug 2002 21:38:30 GMT (75kb)