H I absorption toward cooling flows in clusters of galaxies

Details H I absorption toward cooling flows in clusters of galaxies H I absorption toward cooling flows in clusters of galaxies

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...360...20m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 360, Sept. 1, 1990, p. 20-29.

Astronomy and Astrophysics

Astrophysics

62

Cooling Flows (Astrophysics), Extragalactic Radio Sources, Galactic Clusters, H I Regions, Interstellar Matter, Sky Surveys (Astronomy), X Ray Astronomy

Scientific paper

An H I survey of 14 cooling flow clusters and two noncooling flow clusters was conducted, and H I absorption features were detected against the nuclear radio continuum sources of two cooling flow dominant (CFD) galaxies, 2A 0335 + 096 and MKW3s. The absorption features are broad and redshifted with respect to the stellar absorption-line velocity of the CFDs by 90-225 km/s. This indicates that the H I is falling onto, and is probably gravitationally bound to, the CFDs. The kinematics of the H I clouds suggest a possible kinematic link between the warm and cold phases of the intracluster medium. The clouds are orders of magnitude smaller in radius and mass and larger in density than Galactic H I clouds. The detected CFDs have mass-accretion rates that are about 2.5 times larger than the CFDs that were not detected.

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