GINGA observations of Abell 2281 - Implications for H0

Details GINGA observations of Abell 2281 - Implications for H0 GINGA observations of Abell 2281 - Implications for H0

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.242..215m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 242, Jan. 15, 1990, p. 215-220.

Astronomy and Astrophysics

Astronomy

56

Ginga Satellite, Hubble Constant, Relic Radiation, Spaceborne Astronomy, X Ray Astronomy, Compton Effect, Japanese Spacecraft, Mass Distribution, X Ray Spectra

Scientific paper

Ginga observations of the Abell 2218 cluster of galaxies, in whose direction the most intensive searches for the Sunyaev-Zel'dovich effect have been conducted, indicate that the cluster's spectrum is well fitted by an isothermal model of 6.7 (+0.5/-0.4) keV temperature. Under the assumption of a central SZ decrement value of -0.69 + or - 0.10 mK, a calculation of radial gas density distribution by deprojecting the X-ray surface brightness leads to a uniform cluster gas Hubble constant of 24 (+13/-10) km/sec per Mpc. Attention is given to the possible reasons for the discrepancy between this value and other currently accepted ones derived by other methods.

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