Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997pasj...49..653o&link_type=abstract
Publications of the Astronomical Society of Japan, v.49, p.653-658.
Astronomy and Astrophysics
Astronomy
13
Galaxies: Individual (M83), Galaxies: Spiral, Galaxies: Star-Burst, Galaxies: X-Rays, X-Rays: Spectra
Scientific paper
Combined spectral and spatial analyses of the central region of the nearby spiral galaxy M83 shows the presence of two different emission components. One component has a spatial size of 2.7', as defined by the rms radius of the emission region, and has an emission temperature of about 5 keV when it is approximated with a thermal-bremsstrahlung model. The other component has a much smaller radius with an upper limit of 1.0' rms radius, and has a lower emission temperature of about 0.4 keV. The X-ray luminosities of the two components are, respectively, 2.1times 10(39) erg s(-1) (soft component) and 4.8 times 10(39) erg s(-1) (hard component) in the 0.5--10 keV band (for the distance of 3.75 Mpc). The soft, lower-temperature component is consistent to be emission from the hot gas originating from the star-burst activity in the galaxy. On the other hand, the hard component is consistent with being a collection of binary X-ray sources in the bulge region.
Dotani Tadayasu
Mitsuda Kazuhisa
Okada Kyoko
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