Detection of forbidden Fe XIV emission in HD 153919 /3U 1700-37/

Details Detection of forbidden Fe XIV emission in HD 153919 /3U 1700-37/ Detection of forbidden Fe XIV emission in HD 153919 /3U 1700-37/

Dec 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...218l..71d&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 218, Dec. 1, 1977, p. L71-L74.

Other

3

Eclipsing Binary Stars, Emission Spectra, Forbidden Transitions, Iron, X Ray Stars, Coronas, Fine Structure, Photoionization, Radial Velocity, Spectral Line Width, Spectral Resolution, Stellar Atmospheres, Stellar Radiation, Stellar Spectra

Scientific paper

Spectra of HD 153919 show a previously unreported broad emission line near 5293 A that is present at phases 0.2 and 0.8 and is absent or weaker at other phases, including the time of eclipse of the X-ray source. Approximate calculations suggest identification of this feature with the forbidden Fe XIV transition at 5303 A. This line may arise in the extended atmosphere of the primary ionized by the compact X-ray source or may occur in a high-temperature corona. Further monitoring is needed.

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