Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...226l.111b&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 226, Dec. 15, 1978, p. L111-L114.
Astronomy and Astrophysics
Astrophysics
44
Elliptical Galaxies, Radio Galaxies, Seyfert Galaxies, X Ray Sources, Emission Spectra, Galactic Nuclei, Morphology, Nonthermal Radiation, Red Shift
Scientific paper
The detection of X-ray emission from NGC 2110, a narrow-emission-line galaxy of apparently elliptical morphology, is reported. A relatively hard 2-11-keV energy spectrum with an index of 0.1 + or - 0.3 is obtained, and the X-ray luminosity in this energy band is shown to be 1.2 x 10 to the 43rd erg/s for the redshift distance of 43 Mpc. Optical and radio observations are discussed which indicate a galactocentric redshift of approximately 0.0071, a resolved nonstellar optical nucleus about 4 arcsec in extent, Seyfert type 2 emission lines from the nucleus, and a nonthermal radio source located 3.0 arcsec from the position of the optical nucleus. No evidence is found for X-ray source variability in NGC 2110. It is suggested that the four to seven known X-ray-emitting high-excitation narrow-emission-line galaxies appear to be nearby examples of the Seyfert type 2 phenomenon and that the elliptical morphology of NGC 2110, if confirmed, may be unique among known Seyfert galaxies.
Bradt Hale V.
Burke Bernard F.
Canizares Calude R.
Greenfield Perry E.
Kelley Richard L.
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