Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....92..642n&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 92, Sept. 1986, p. 642-652.
Astronomy and Astrophysics
Astronomy
17
Interstellar Gas, Line Of Sight, Ultraviolet Spectra, Velocity Distribution, Wolf-Rayet Stars, Astronomical Spectroscopy, Binary Stars, Iue, Line Spectra, Star Clusters, Stellar Mass Ejection, Supernova Remnants
Scientific paper
A large, high-velocity interstellar shell has been discovered in the direction of the Wolf-Rayet star HD 50896. Two distinct high-velocity interstellar components at approximately -80 and -125 km s-1 were detected in the low-ionization resonance lines of IUE spectra for HD 50896 and 11 neighboring field stars, precluding the possibility that this high-velocity gas is related to S308, the prominent ring nebula surrounding HD 50896. The data collected for HD 50896, at a distance of 1.5 kpc, and for 19 field stars located up to 4° from HD 50896 with distances ranging from 0.6 to 2.9 kpc, indicate that the high-velocity interstellar gas lies at a distance of 1.0±0.2 kpc, has a diameter in excess of 90 pc, and is probably physically associated with the cluster Cr 121. The authors conclude that this high-velocity expanding interstellar shell represents a previously unidentified, well-evolved supernova remnant. Implications for a possible association of the supernova remnant with HD 50896 and its suspected binary companion are discussed.
Fesen Robert A.
Nichols-Bohlin Joy
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