A search for far-ultraviolet emission from Sirius B

Details A search for far-ultraviolet emission from Sirius B A search for far-ultraviolet emission from Sirius B

Oct 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...225l..67b&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 225, Oct. 15, 1978, p. L67-L69.

Astronomy and Astrophysics

Astrophysics

7

Far Ultraviolet Radiation, Ultraviolet Spectra, White Dwarf Stars, Abundance, Hydrogen, Radiant Flux Density, Stellar Structure, Stellar Temperature

Scientific paper

A rocket observation of Sirius in the far-UV region from 912 to 1240 A is reported. It is found that only a few counts were detected which can possibly be attributed to the hydrogen-rich white dwarf Sirius B. An upper limit of 2.0 by 10 to the -10th power erg/sq cm per sec/A on the Sirius B flux in the range from 1000 to 1080 A is established with 99.3% confidence. This upper limit is shown to constrain the model-dependent effective temperature of Sirius B to be less than or approximately 27,000 K. It is concluded that the observed X-ray flux from Sirius cannot be emitted by the photosphere of Sirius B.

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