H I in giant elliptical galaxies with cooling flows

Details H I in giant elliptical galaxies with cooling flows H I in giant elliptical galaxies with cooling flows

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...330l..93b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 330, July 15, 1988, p. L93-L96.

Astronomy and Astrophysics

Astrophysics

36

Elliptical Galaxies, H I Regions, Interstellar Gas, X Ray Sources, Cooling, Stellar Evolution, Stellar Mass

Scientific paper

H I measurements were made of three giant elliptical galaxies that have X-ray cooling flows; the 305-m Arecibo telescope was used. In NGC 4406, H I was detected in the center and along the major and minor axis; the total detected mass is 1.5 x 10 to the 8th solar mass. The H I is centrally peaked and is not rotationally supported, properties expected in the cooling-flow picture. The galaxies NGC 4472 and NGC 5846 were not detected and have upper limits of 1.3 and 5.1 x 10 to the 7th solar mass. The failure to detect H I in these objects may imply that the H I is opaque and with a small filling factor, or that the theoretical picture is more complicated than originally believed.

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