Other
Scientific paper
Feb 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.242..669s&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 242, Feb. 15, 1990, p. 669-673.
Other
65
Line Shape, Metallicity, Spectral Line Width, Supernova 1987A, Bubbles, Iron, Nickel
Scientific paper
Line profiles of iron-group elements seen in near-IR spectra of SN 1987A, are presented. The profiles are strikingly different from the observed transitions of other elements, but quite similar to those observed in the mid-IR transitions of the iron-group elements. Blends, optical depth effects, and electron scattering are ruled out as the source of the distinctive profiles. The iron-group elements have a unique spatial distribution in the ejecta, and the profiles are due to emission from a low-density inner region (the nickel bubble) which has fragmented into high-velocity bullets. The abrupt change of the iron-group line profiles is primarily the result of faster cooling of the ejecta on the far hemisphere from earth.
Allen David A.
Meikle Peter S. W.
Spyromilio Jason
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