Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...324..193e&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 324, Jan. 1, 1988, p. 193-197.
Astronomy and Astrophysics
Astrophysics
26
Active Galactic Nuclei, Astronomical Spectroscopy, Far Infrared Radiation, Galactic Structure, Markarian Galaxies, X Ray Sources, Absorption Spectra, Emission Spectra
Scientific paper
The Einstein X-ray data for the two luminous infrared galaxies, Arp 220 and Markarian 231 have been analyzed. There is an X-ray source about 1 arcmin from the position of Arp 220 that is probably associated with it. Mrk 231 was not detected. The size of the source and its soft X-ray spectrum implies that the bulk of the X-ray emission from Arp 220 cannot be coming from the obscured active nucleus at the galaxy's center. The absence of strong X-ray emission from the active nuclei in Arp 220 and Mrk 231 suggests that there must be more line-of-sight absorption to the active nuclei than is inferred from many of the absorption indicators available.
Arnaud A. A. K.
Eales Stephen A.
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