AbstractOur XMM-Newton observations of Abell 85 confirm the extended 4Mpc filament first detected with ROSAT, which has an X-ray temperature of about ∼2keV and is probably made of groups falling on to the cluster. A comparison of the temperature map with numerical simulations show that Abell 85 had intense merging activity in the past and is not fully relaxed, even in the central region. Finally, a deprojected temperature profile has been calculated and used, together with the surface brightness, to estimate the entropy and pressure profiles. Abell 85 only presents a mild flattening of the entropy profile in the center, showing no evidence of an “entropy floor”.


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    Title :

    The merging cluster Abell 85 caught between meals by XMM-Newton


    Contributors:

    Published in:

    Advances in Space Research ; 36 , 4 ; 618-621


    Publication date :

    2005-01-12


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English






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