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Title:
Determining star formation rates in X-ray cluster cooling flows
Authors:
White, Raymond E., III; Sarazin, Craig L.
Affiliation:
AA(Virginia, University, Charlottesville; Cambridge University, England), AB(Virginia, University, Charlottesville; Joint Institute for Laboratory Astrophysics, Boulder, CO)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 318, July 15, 1987, p. 621-628. (ApJ Homepage)
Publication Date:
07/1987
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Cooling, Cooling Flows (Astrophysics), Galactic Clusters, Gas Flow, Star Formation, X Ray Sources, Astronomical Spectroscopy, Computational Astrophysics, Galactic Evolution, Intergalactic Media, Spectrum Analysis
DOI:
10.1086/165398
Bibliographic Code:
1987ApJ...318..621W

Abstract

Many X-ray clusters of galaxies are observed to have cooling flows at their centers. Each of these cooling flows is depositing mass onto a central dominant galaxy at a rate of 10-400 solar masses/yr. With such large accretion rates it seems possible that these accreting galaxies are still being formed through ongoing star formation in their associated cooling flows. In this paper techniques are developed to determine directly the distributions of local star formation rate, mass, gas density, temperature, and velocity from cooling flow X-ray surface brightness data. These techniques take account of the potentially important X-ray emission from star-forming cooling condensations dropping out of the background flow. Surface brightness data with either good or poor energy resolution are considered separately.

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