X-ray observations of the starburst galaxy M82

Details X-ray observations of the starburst galaxy M82 X-ray observations of the starburst galaxy M82

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...336..722s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 336, Jan. 15, 1989, p. 722-733.

Astronomy and Astrophysics

Astrophysics

83

Star Formation, Starburst Galaxies, Supernova Remnants, X Ray Spectra, Compton Effect, Emission Spectra, Exosat Satellite, Power Spectra, Thermal Emission, Thermal Radiation

Scientific paper

Long X-ray observations of the starburst galaxy M82 with the European X-ray satellite EXOSAT are reported. The observations with the low-energy imaging instrument confirm that there is extended X-ray emission from above and below the disk, with an overall extent perpendicular to the disk of almost 6 arcmin corresponding to 6 kpc. One of the best defined X-ray spectra yet of a starburst galaxy is presented. The medium energy instrument measurements can be fitted with a power-law spectrum, consistent with inverse Compton emission, or with thermal emission from optically thin hot gas of a temperature of 9 + 9 or -4 keV. Using, in addition, the earlier Einstein HRI and MPC observations, the possible origin of the X-ray emission is discussed.

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