Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...246l..51a&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 246, no. 1, June 1991, p. L51-L54.
Astronomy and Astrophysics
Astrophysics
12
Cooling Flows (Astrophysics), Forbidden Transitions, Galactic Clusters, Galactic Nuclei, Intergalactic Media, Iron, Line Spectra, Brightness Distribution, Emission Spectra, Mass Flow Rate, Spectrograms, X Ray Astronomy
Scientific paper
The coronal forbidden line Fe X 6374 A (hereafter Fe X) has been detected in the central cD galaxy of the cooling flow cluster A1795. This emission line is found by averaging the innermost + or - 2 arcsec of nine long slit spectra crossing the galaxy center. For this mean spectrum Fe X/H-alpha is approximately equal to 1/48, corresponding to a nuclear peak surface brightness of 3.0 x 10 to the -17th erg/s/sq cm/sq arcsec, a nuclear luminosity of 2.9 x 10 to the 39th erg/s and a mass deposition rate of 190 solar mass/yr. This value is one and a half times the total mass flow rate of 130 solar mass/yr derived from X-ray observations and may indicate that most of the cooling gas reaches intermediate temperatures within 2 arcsec around the nucleus of the central cluster galaxy.
Anton Klaus
Appenzeller Immo
Wagner Stefan
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