Optical emission-line gas associated with dominant cluster galaxies

Details Optical emission-line gas associated with dominant cluster galaxies Optical emission-line gas associated with dominant cluster galaxies

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...250l..59h&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 250, Nov. 15, 1981, p. L59-L63.

Astronomy and Astrophysics

Astronomy

116

Galactic Clusters, Line Spectra, Optical Emission Spectroscopy, Radio Galaxies, X Ray Astronomy, Data Reduction, Gas Flow, Luminosity, Molecular Excitation, Spectrum Analysis

Scientific paper

A representative sample of 13 dominant cluster galaxies is investigated to determine the presence of the type of emission-line region seen around M87 and NGC 1275. Half of the sample shows detectable emission lines where L(H-alpha + forbidden N III) is greater than 10 to the 40.5th/erg (H0 = 75). The emission-line luminosity appears to be related to the X-ray luminosity and/or the cluster richness, and a relationship between optical-line and radio emission is found, which indicates that the radio source may help form or excite the emission-line gas. Data are also consistent with the cooling accretion flow picture, which is modified by including the role of the radio source.

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