Astronomy and Astrophysics – Astronomy
Scientific paper
May 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...230l..21g&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 230, May 15, 1979, p. L21-L25.
Astronomy and Astrophysics
Astronomy
44
Galactic Nuclei, Galactic Radiation, Seyfert Galaxies, X Ray Sources, Collimators, Emission Spectra, Heao 1, X Ray Astronomy
Scientific paper
Data from the scanning modulation collimator on HEAO 1 are presented which firmly establish high-excitation emission-line galaxies as a class of X-ray source. For NGC 5506 and M82, the X-ray emission (1-13 keV) is shown to originate in the nuclear region of the galaxy; NGC 2992 and NGC 526a are also identified as X-ray emitters, but are not resolved. The latter is a new identification for 2A 0120-353, previously associated with the NGC 526/527 group. In these four particular cases, the observed X-ray-emitting galaxies have a close companion, and the X-ray emission may have been triggered by a close encounter
Blades Chris J.
Doxsey Rodger Evans
Griffiths Richard E.
Johnston Matthew D.
Schwartz Dana A.
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