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- W6556876 abstract "High resolution spectra of SN 1993J obtained on March 31.0, only three days past outburst, show narrow emission lines due to Hα, HeII λ4686 and to the high ionization [FeX] λ6374 and [FeXIV] λ5303. The latter, to our knowledge, has never been identified before in SN spectra. The FWHM of the recombination lines indicate that the emitting gas has velocities ∼170 km s −1 which seems too large to be attributed to a normal stellar wind. The detection of narrow lines soon after outburst and their disappearance one week later, indicate that the circumstellar gas is confined close to the exploding star (R≤4×10 15 cm). The coronal lines are probably generated in the CSM heated by the radiation emerging from the shocked regions" @default.
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- W6556876 date "1994-05-01" @default.
- W6556876 modified "2023-09-26" @default.
- W6556876 title "Narrow features in the early spectrum of SN 1993J" @default.
- W6556876 hasPublicationYear "1994" @default.
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