On the ultrasoft X-ray background

Details On the ultrasoft X-ray background On the ultrasoft X-ray background

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...205..226l&link_type=abstract

Astrophysical Journal, vol. 205, Apr. 1, 1976, pt. 1, p. 226-232.

Computer Science

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22

Background Radiation, Energy Spectra, X Ray Sources, X Ray Spectra, High Temperature Plasmas, Interstellar Matter, Latitude, Rocket Sounding

Scientific paper

The soft X-ray background has been studied down to energies of the order of 90 eV. The spectrum is found to be extremely soft, though not as steeply rising toward very low energies as indicated by Yentis et al. (1972). The background is both softer and more intense at high northern galactic latitudes than at low latitudes. Measured pulse-height spectra are analyzed under the assumption of different source models. The results are consistent with an origin of the background in a hot interstellar plasma with a temperature of about 800,000 K and a hot electron density of approximately 0.001 per cu cm. Upper limits are set on the soft X-ray emission from several interesting stellar objects.

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