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The relationship between soft X-rays and the 1640 Å feature fluxes in late-type stars



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Rego Fernández, Manuel and González Riestra, R. and Fernández Figueroa, María José (1983) The relationship between soft X-rays and the 1640 Å feature fluxes in late-type stars. Astronomy and astrophysics, 119 (2). pp. 227-232. ISSN 0004-6361

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Official URL: http://adsabs.harvard.edu/abs/1983A%26A...119..227R


The λ 1640 feature has been observed in a sample of late­ type stars of different luminosity classes. The intensity was measured from IUE low dispersion spectra, and it has been compared with the observed X-ray fluxes, finding a relationship between both quantities for "solar type" stars. The X-ray fluxes derived from this relationship for a reduced sample of stars are consistent with the observed ones in the case of "solar type" stars. "Non solar type" stars exhibit discrepancies that could be explained assuming that the λ 1640 feature is formed by contri­buters other than He II, which supply an important fraction of this emission in "solar type" stars. The obtained empirical relationship has been used to derive the X-ray flux for some stars that have not been observed in the X-ray range.

Item Type:Article
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© European Southern Observatory (ESO).
© EDP Sciencies.

Uncontrolled Keywords:Emission lines; X-rays; Late type stars
Subjects:Sciences > Physics > Astrophysics
Sciences > Physics > Astronomy
ID Code:32914
Deposited On:27 Aug 2015 12:48
Last Modified:10 Dec 2018 15:05

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