Mathematics – Logic
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...325..544f&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 325, Feb. 15, 1988, p. 544-562.
Mathematics
Logic
93
Galactic Nuclei, Spiral Galaxies, X Ray Sources, X Ray Spectra, Heao 2, Luminosity, Power Spectra, Seyfert Galaxies, Spectrum Analysis
Scientific paper
X-ray observations of M81 made with the Einstein satellite are analyzed, and the results are reported. Eight bright sources other than the nucleus were detected, with luminosities in excess of about 2 x 10 to the 38th ergs/s. These are probably young, massive, accreting binary systems. A comparison of M81 with the morphologically similar galaxy M31 shows that the former is overluminous in both the radio continuum and the X-ray emission and to a lesser extent the far-infared emission, relative to the optical luminosity. This points to a difference in the star-formation histories of the two galaxies. The individual X-ray sources detected in M81 are all more luminous than the most luminous sources of M31. The nuclear source in M81 has a very soft and absorbed X-ray spectrum which cannot be explained by either inverse Compton radiation of the compact nuclear radio source or by an extension of the radio synchrotron emission.
No associations
LandOfFree
The X-ray emission of M81 and its nucleus does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The X-ray emission of M81 and its nucleus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The X-ray emission of M81 and its nucleus will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1224975