An Improved Measurement of the Hubble Constant from the Sunyaev-Zeldovich Effect

Details An Improved Measurement of the Hubble Constant from the Sunyaev-Zeldovich Effect An Improved Measurement of the Hubble Constant from the Sunyaev-Zeldovich Effect

2001-01-11

arxiv.org/abs/astro-ph/0101169v1

Astronomy and Astrophysics

Astrophysics

5 pp., Accepted for publication in ApJL

Scientific paper

We present a determination of the Hubble constant from measurements of the Sunyaev-Zeldovich Effect (SZE) in an orientation-unbiased sample of 7 z < 0.1 galaxy clusters. With improved X-ray models and a more accurate 32-GHz calibration, we obtain H_O = 64+14-11 +/- 14_sys km/s/Mpc. for a standard CDM cosmology, or 66+14-11 +/- 15_sys km/s/Mpc for a flat LambdaCDM cosmology. In combination with X-ray cluster measurements and the BBN value for Omega_B, we find Omega_M = 0.32 +/- 0.05.

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