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, P.D.; Ade, P.A.R.; Allen, S.W.; Church, S.E.; Edge, A.C.; Ganga, K.M.; Holzapfel, W.L.; Lange, A.E.; Rownd, B.K.; Philhour, B.J.; Runyan, M.C.

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 = 022 ± 002 and β = 0.58 ± 0.02. Assuming the cluster gas to be isothermal with a temperature of 9.8 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 = 59 km s-1 Mpc-1 and a central electron density for Abell 1835 of ne0 = 5.64 × 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.

Citation

Mauskopf, P., Ade, P., Allen, S., Church, S., Edge, A., Ganga, K., …Runyan, M. (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. Astrophysical Journal, 538(2), 505-516. https://doi.org/10.1086/309137

• Journal Article Type: Article
• Publication Date: Aug 1, 2000
• Deposit Date: Sep 12, 2013
• Publicly Available Date: Jan 3, 2014
• Journal: Astrophysical Journal
• Print ISSN: 0004-637X
• Electronic ISSN: 1538-4357
• Publisher: American Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 538
• Issue: 2
• Pages: 505-516
• DOI: https://doi.org/10.1086/309137
• Keywords: Cosmology, Observations, Distance scale, Galaxies, Clusters, Individual (A1835), Radio continum, X-rays.