Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...208...22b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 208, no. 1-2, Jan. 1989, p. 22-26. Research supported by NSERC.
Astronomy and Astrophysics
Astronomy
15
Active Galactic Nuclei, Elliptical Galaxies, Intergalactic Media, X Ray Sources, Interstellar Gas, Mass To Light Ratios, Radio Jets (Astronomy)
Scientific paper
The X-ray emission from NGC 5846 is characterized, reanalyzing the observations of Biermann and Kronberg (1983). The unusually high X-ray background in the field is accounted for by subtracting a background based on observations of I 10225, obtained with approximately the same IPC calibration and observation time as part of a survey of barred spiral galaxies. The acquisition and reduction of the data are described, and the results are presented in tables, graphs, and a contour map. Assuming H0 = h(50) x 50 km/sec Mpc, it is found that the X-ray emission has radial extent 120/h(50) kpc and can be attributed to hot gas of mass about 10 to the 11th x h(50) exp -5/2 solar masses and radial density distribution proportional to r exp -3/2. It is concluded that normal elliptical galaxies like NGC 5846 can exist outside large clusters.
Biermann Peter L.
Kronberg Philipp P.
Schmutzler Thomas
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