Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nascp2349..207h&link_type=abstract
In NASA. Goddard Space Flight Center Future of Ultraviolet Astronomy Based on Six Years of IUE Res. p 207-210 (SEE N85-20961 1
Astronomy and Astrophysics
Astronomy
1
Absorption Spectra, Interstellar Gas, Ultraviolet Spectra, Wolf-Rayet Stars, Binary Stars, High Speed, Iue, Line Spectra, Stellar Evolution, Supernova Remnants
Scientific paper
Using high-dispersion IUE spectra, a large interstellar shell structure was discovered in the line-of-sight to the Wolf-Rayet star HD 50896. Blue-shifted interstellar absorption lines indicative of high-velocity gas are present in the spectra of four B stars located up to 2 deg away from HD 50896 and at a distance of 1000 to 1400 parsecs, suggesting a linear diameter for the structure of at least 40 parsecs. These high-velocity components, present only in the low ionization lines and exhibiting nearly cosmic abundances, can be interpreted as a heretofore unknown and extremely old supernova remnant. The existence of such a supernova remnant potentially associated with HD 50896, a runaway Wolf-Rayet star believed to have a compact companion, implies that HD 50896 may be a binary in its second Wolf-Rayet phase of evolution.
Fesen Robert A.
Heckathorn J. N.
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