A Determination of the Hubble Constant Using Measurements of X-Ray Emission and the Sunyaev-Zeldovich Effect at Millimeter Wavelengths in the Cluster Abell 1835

Mauskopf, Philip Daniel ORCID: https://orcid.org/0000-0001-6397-5516, Ade, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401, Allen, S. W., Church, S. E., Edge, A. C., Ganga, K. M., Holzapfel, W. L., Lange, A. E., Rownd, B. K., Philhour, B. J. and Runyan, M. C. 2000. A Determination of the Hubble Constant Using Measurements of X-Ray Emission and the Sunyaev-Zeldovich Effect at Millimeter Wavelengths in the Cluster Abell 1835. The Astrophysical Journal 538 (2) , pp. 505-516. 10.1086/309137

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Abstract

We present a determination of the Hubble constant and central electron density in the cluster Abell 1835 (z = 0.2523) from measurements of X-ray emission and millimeter-wave observations of the Sunyaev-Zeldovich (S-Z) effect with the Sunyaev-Zeldovich Infrared Experiment (SuZIE) multifrequency array receiver. Abell 1835 is a well studied cluster in the X-ray with a large central cooling flow. Using a combination of data from ROSAT PSPC and HRI images and millimeter wave measurements we fit a King model to the emission from the ionized gas around Abell 1835 with θ0 = 0farcm22 ± 0farcm02 and β = 0.58 ± 0.02. Assuming the cluster gas to be isothermal with a temperature of 9.8img1.gif keV, we find a y-parameter of 4.9 ± 0.6 × 10-4 and a peculiar velocity of 500 ± 1000 km s-1 from measurements at three frequencies, 145, 221, and 279 GHz. Combining the S-Z measurements with X-ray data, we determine a value for the Hubble constant of H0 = 59img2.gif km s-1 Mpc-1 and a central electron density for Abell 1835 of ne0 = 5.64img3.gif × 10-2 cm-3 assuming a standard cosmology with Ωm = 1 and ΩΛ = 0. The error in the determination of the Hubble constant is dominated by the uncertainty in the temperature of the X-ray emitting cluster gas.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Publisher:	IOP Publishing
ISSN:	0004-637X
Last Modified:	24 Oct 2022 11:25
URI:	https://orca.cardiff.ac.uk/id/eprint/48107

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