Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...323l.113r&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 323, Dec. 15, 1987, p. L113-L116.
Astronomy and Astrophysics
Astronomy
65
Galactic Clusters, Star Formation, Color, Cooling, Gas Ionization, H Alpha Line, Stellar Luminosity, Stellar Mass, X Ray Astronomy
Scientific paper
Optical imaging has been used to study the continuum color distributions of NGC 1275 in the Perseus cluster and the PKS 0745-191 cluster central galaxy, and the emission line flux of PKS 0745-191. Both clusters have strong cooling flows. The Hα luminosity of PKS 0745-191 is equal to that for NGC 1275/Perseus cluster. It is shown that the optical properties of NGC 1275 and the PKS 0745-191 central galaxy are very similar. The author discusses the amount of star formation in these two systems, the possible role of stars in providing ionization for the emission-line gas, and, by comparing the properties of the two clusters, comments on the interpretation of NGC 1275 and its peculiarities.
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