The Fate of Matter in the Moderate Cooling Flow Cluster Abell 1991

Physics

Scientific paper

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Chandra Proposal Id #03800104

Scientific paper

Using Chandra imaging, ground based U, R, I, and VLA radio imaging for Abell 1991, we will reevaluate the proposition that large quantities of intracluster gas are cooling and accreting onto its central cluster galaxy (CDG) and fueling star formation. In addition, we will study in detail the role of its radio source on the dynamics of the hot gas, and in triggering star formation. Measurements of the physical state of the keV gas will be made on the same arcsecond spatial scales as the star formation regions, permitting the cooling rates and star formation rates to be directly compared and perhaps reconciled. Abell 1991 is an excellent example of a bright cooling flow with a moderately small cooling rate and radio power, which is the most abundant type of cooling flow cluster.

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