Another Collision for the Coma Cluster | Zendy

A. Vikhlinin | Zendy; W. Forman | Zendy; C. Jones | Zendy

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Another Collision for the Coma Cluster

Author(s) -

A. Vikhlinin,

W. Forman,

C. Jones

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 - 10.1086/310415

Subject(s) - rosat , coma cluster , astrophysics , physics , substructure , cluster (spacecraft) , galaxy , galaxy cluster , ram pressure , brightest cluster galaxy , astronomy , star formation , structural engineering , computer science , engineering , programming language

We describe a wavelet transform analysis of the ROSAT PSPC images of the Comacluster. On small scales, ~< 1', the wavelet analysis shows substructuredominated by two extended sources surrounding the two brightest clustergalaxies NGC 4874 and NGC 4889. On slightly larger scales, ~2', the waveletanalysis reveals a filament of X-ray emission originating near the clustercenter, curving to the south and east for ~25' in the direction of the galaxyNGC 4911, and ending near the galaxy NGC 4921. These results extend earlierROSAT observations and further indicate the complex nature of the cluster core.We consider two possible explanations for the production of the filamentaryfeature as arising from interactions of the main cluster with a merging group.The feature could arise from either ram pressure stripped gas or a dark matterperturbation of tidally stripped material.Comment: ApJ Letters, in pres

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