High-velocity iron absorption lines in supernova remnant 1006
Journal Article
·
· Astrophys. J., Lett. Ed.; (United States)
The International Ultraviolet Explorer spectrum of the Schweizer-Middleeditch star projected near the center of supernova remnant SNR 1006 shows an sdOB Star continuum, with very strong, broad absorption lines. Strong Fe/sup +/ resonance absorption lines are present. Their centers show zero radial velocity, while their profiles are broadened by approx.5-6 x 10/sup 3/ km s/sup -1/. Redshifted Si/sup +,+2,+3/ lines at ..nu../sub r/approx.5 x 10/sup 3/ km s/sup -1/ have also been tentatively identified. We argue that the absorptions must occur in the ejecta of the supernova. The strength and symmetric width of the Fe/sup +/ lines suggests that the bulk of ejecta is iron, in agreement with the current theory for the origin of Type I supernovae. The previous failure to detect strong Fe emission lines in the X-ray spectrum of this and other young Type I SNRs suggests that the ejecta may not have had time to interact significantly with the ambient medium. The presence of redshifted absorption lines due to supernova ejecta in its spectrum indicates that this star is located behind the SNR and is not physically associated with it.
- Research Organization:
- Computer Sciences Corporation
- OSTI ID:
- 5838504
- Journal Information:
- Astrophys. J., Lett. Ed.; (United States), Journal Name: Astrophys. J., Lett. Ed.; (United States) Vol. 269:1; ISSN AJLEA
- Country of Publication:
- United States
- Language:
- English
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