The nature of the secondaries in some single-line spectroscopic binaries from X-ray observations

Details The nature of the secondaries in some single-line spectroscopic binaries from X-ray observations The nature of the secondaries in some single-line spectroscopic binaries from X-ray observations

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....80....1d&link_type=abstract

Astronomy and Astrophysics, vol. 80, no. 1, Nov. 1979, p. 1-8.

Astronomy and Astrophysics

Astronomy

4

Astronomical Netherlands Satellite, Binary Stars, Companion Stars, Line Spectra, Stellar Spectrophotometry, X Ray Astronomy, Flux Density, Roche Limit, Spectrum Analysis, Stellar Coronas, Stellar Mass Accretion, Stellar Mass Ejection, Stellar Winds

Scientific paper

The paper presents the results of a search for X-ray emission in the energy regions 0.16-0.284 keV and 1-3.5 keV from a number of single line spectroscopic binaries. In the soft X-ray channel two of the program objects, HR 976 and Pi(5) Ori, gave fluxes corresponding to about 10 to the 30 and 10 to the 32 erg per s, respectively. For the other objects upper limits corresponding to 10 to the 31 - 10 to the 33 erg per s, depending on the object, are reported. On the basis of a stellar wind accretion model, these upper limits are converted into upper limits of mass loss rates of the primary components in the case of the secondary being a normal as well as a compact companion. These values are compared with the known mass loss rates for stars of the same type. From this comparison, the presence of a compact secondary could be excluded in BD+57 deg 2611.

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