On two new X-ray sources in the SMC and the high luminosities of the Magellanic X-ray sources

Details On two new X-ray sources in the SMC and the high luminosities of the Magellanic X-ray sources On two new X-ray sources in the SMC and the high luminosities of the Magellanic X-ray sources

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...221l..37c&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 221, Apr. 15, 1978, p. L37-L41.

Astronomy and Astrophysics

Astrophysics

95

Magellanic Clouds, Radiant Flux Density, X Ray Sources, Abundance, Binary Stars, X Ray Spectra, X Ray Stars

Scientific paper

The discovery of two new X-ray sources, SMC X-2 and SMC X-3, in the Small Magellanic Cloud is reported. They have hard spectra, and their luminosities in the energy range 2-11 keV are 1.0 and 0.7 by 10 to the 38th power erg/sq cm per sec, respectively. It is shown that the luminosity distribution of the known Magellanic X-ray sources, which are now nine in number, is shifted toward higher luminosities with respect to that of similar sources in the Galaxy, and that the cause of the shift is probably an underabundance of heavy elements in the material accreted by the X-ray sources.

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