Discovery of a Large-scale Abundance Gradient in the Cluster of Galaxies AWM 7 with [ITAL]ASCA[/ITAL] | Zendy

H. Ezawa | Zendy; Y. Fukazawa | Zendy; Kazuo Makishima | Zendy; T. Ohashi | Zendy; Fumio Takahara | Zendy; Haiguang Xu | Zendy; Noriko Y. Yamasaki | Zendy

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Discovery of a Large-scale Abundance Gradient in the Cluster of Galaxies AWM 7 with [ITAL]ASCA[/ITAL]

Author(s) -

H. Ezawa,

Y. Fukazawa,

Kazuo Makishima,

T. Ohashi,

Fumio Takahara,

Haiguang Xu,

Noriko Y. Yamasaki

Publication year - 1997

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/311004

Subject(s) - astrophysics , physics , intracluster medium , galaxy , radius , abundance (ecology) , galaxy cluster , cluster (spacecraft) , astronomy , biology , computer security , fishery , computer science , programming language

A large-scale gradient in the metal abundance has been detected with ASCAfrom an X-ray bright cluster of galaxies AWM7. The metal abundance shows a peakof 0.5 solar at the center and smoothly declines to <~ 0.2 solar at a radius of500 kpc. The gas temperature is found to be constant at 3.8 keV. The radialdistribution of iron can be fit with a beta-model with beta ~ 0.8 assuming thesame core radius (115 kpc) as that of the intracluster medium. The metaldistribution in AWM7 suggests that the gas injected from galaxies is notefficiently mixed in the cluster space and traces the distribution of galaxies.Comment: 14 pages with 3 figures, LaTeX with AASTeX v4.0 style file, accepted for publication in ApJ

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