A search for coronal emission lines in HD 153919 /3U 1700-37/

Details A search for coronal emission lines in HD 153919 /3U 1700-37/ A search for coronal emission lines in HD 153919 /3U 1700-37/

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...228l..37l&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 228, Feb. 15, 1979, p. L37-L40.

Astronomy and Astrophysics

Astrophysics

1

Astronomical Spectroscopy, Eclipsing Binary Stars, Iron, Line Spectra, O Stars, Optical Emission Spectroscopy, X Ray Sources, Absorption Spectra, Emission Spectra, Helium Atoms, Hydrogen Atoms, Radial Velocity, Radiant Flux Density, Spectral Line Width, Stellar Coronas, Ultraviolet Spectroscopy

Scientific paper

Low-noise Reticon spectra of HD 153919, which is identified with the X-ray source 3U 1700-37, do not show the 5303-A forbidden Fe XIV emission line previously reported by Dupree et al. (1977). The new spectra provides an upper limit to the central intensity of a forbidden Fe XIV line which is at least a factor of 6 below the intensity reported by Dupree et al. A variation in the forbidden Fe XIV emission-line flux could occur if the X-ray flux were variable on a time scale of years.

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