ASCA Observation of the Distant Cluster of Galaxies CL 0016+16 and Implication for H 0

Details ASCA Observation of the Distant Cluster of Galaxies CL 0016+16 and Implication for H 0 ASCA Observation of the Distant Cluster of Galaxies CL 0016+16 and Implication for H 0

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...504...35f&link_type=abstract

Astrophysical Journal v.504, p.35

Astronomy and Astrophysics

Astronomy

11

Cosmology: Observations, Galaxies: Clusters: Individual Alphanumeric: Cl 0016+16, X-Rays: Galaxies

Scientific paper

We report the 0.5-10 keV X-ray image and spectrum of Cl 0016+16, which, at a redshift of 0.541, is one of the most distant clusters of galaxies observed with ASCA. The ASCA X-ray image is well represented by an isothermal beta model. The best-fit parameters for the core radius ( theta c) and beta are 0.'6 and 0.7, respectively. However, because of ASCA's moderate spatial resolution, these two parameters are strongly correlated. The observed spectrum within a 6' radius is well fitted by a thin thermal emission model with a plasma temperature of 8.0 +/- 1.0 keV. The Sunyaev-Zeldovich (SZ) effect in Cl 0016+16 has been observed by Carlstrom et al. using an interferometer and by Birkinshaw et al. using a single-dish radio telescope. Combining the SZ microwave decrement with the plasma density and temperature profiles derived from our X-ray observation, we obtained a value of the Hubble constant of 47 +/- 14 km s-1 Mpc-1 with the profile parameters obtained by interferometric data, and 52 +/- 20 km s-1 Mpc-1 with our best-fit shape parameters and single-dish telescope data.

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