%0 Journal Article
%A Rego Fernández, Manuel
%A González Riestra, R.
%A Fernández Figueroa, María José
%T The relationship between soft X-rays and the 1640 Å feature fluxes in late-type stars
%D 1983
%@ 0004-6361
%U https://hdl.handle.net/20.500.14352/64989
%X 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.
%~