Constraints on Cosmological Parameters from Existing CMB Data

Details Constraints on Cosmological Parameters from Existing CMB Data Constraints on Cosmological Parameters from Existing CMB Data

1998-04-16

arxiv.org/abs/astro-ph/9804158v1

Astronomy and Astrophysics

Astrophysics

To appear in "Fundamental Parameters in Cosmology", proceedings of the Rencontres de Moriond 1998

Scientific paper

We use current cosmic microwave background data to constrain cosmological parameters. The results are presented as confidence regions in the ($\Omega$--$H_o$) -- plane for both open and flat geometries, and are based on a $\chi^2$ minimization to the power spectrum. Although such an approach does not strictly apply to power spectrum estimates, the results should nonetheless be indicative. We find that purely open, low--$\Omega$ models are strongly disfavored, due to the position of the ``Doppler Peak'' at high $l$; flat models are less strongly constrained. The parameter space explored is the largest to date, covering $\Omega$, $H_o$, $n$, $Q$ and $\Omega_B h^2$.

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