Search for Intrasupercluster Gas in the Shapley Supercluster

Details Search for Intrasupercluster Gas in the Shapley Supercluster Search for Intrasupercluster Gas in the Shapley Supercluster

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...497....1m&link_type=abstract

Astrophysical Journal v.497, p.1

Astronomy and Astrophysics

Astronomy

10

Cosmology: Cosmic Microwave Background, Galaxies: Clusters: General, Galaxies: Intergalactic Medium, X-Rays: Galaxies

Scientific paper

We set limits to the amount of intrasupercluster gas in the Shapley supercluster, using COBE DMR data to search for the Sunyaev-Zeldovich effect and HEAO 1 A-2 data to search for diffuse X-ray emission. Chance alignments of the Shapley supercluster with primordial fluctuations were taken into account in the analysis of the COBE DMR data using the two-point correlation function. We modeled the X-ray emission allowing for known point sources and a gradient in galactic emission. We found no evidence for intrasupercluster gas following a truncated isothermal beta model distribution. The Shapley supercluster does not hold much more hot (>=10 keV) large-scale diffuse intrasupercluster gas than the average baryon density derived from standard nucleosynthesis theories.

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