X-ray features of the North Polar Spur

Details X-ray features of the North Polar Spur X-ray features of the North Polar Spur

May 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...213l.109h&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 213, May 1, 1977, p. L109-L113.

Astronomy and Astrophysics

Astronomy

36

Energy Spectra, Nebulae, Radio Sources (Astronomy), Supernova Remnants, X Ray Sources, X Ray Spectra, Emission Spectra, Line Spectra, Spherical Shells, Thermal Emission

Scientific paper

Soft X-ray observations along 330 deg galactic longitude revealed enhancements associated with the northern and southern arcs of Loop I in the energy range 0.4-1.6 keV. The energy spectrum inside Loop I is markedly different from that outside and is characterized by a hump around 0.65 keV, attributable to emission lines of O VII and O VIII. These features can be interpreted in terms of X-ray emission from a spherical shell having a temperature as high as 3 million K. This supports the hypothesis that Loop I is a supernova remnant.

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