Effect of free electron scattering on the emission line profiles of SN 1987 A

Details Effect of free electron scattering on the emission line profiles of SN 1987 A Effect of free electron scattering on the emission line profiles of SN 1987 A

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994cha%26a..18...60x&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 18, Issue 1, p. 60-66.

Astronomy and Astrophysics

Astrophysics

1

Supernovae, Line Profile, Thomson Scattering

Scientific paper

Observations of SN 1987A showed many of its emission lines (especially those of heavy elements) to have the following features: asymmetric line profile, redshift and large FWHM. If these heavy element lines come from the vicinity of the core region and pass through the outer expanding hydrogen envelope, then these features can be satisfactorily explained by Thomson scattering of photons by free electrons in the envelope. An approximate method of calculating such line profiles is used in this paper. Our results show a good agreement with the observed profile of Ar II of SN 1987A. In the course of fitting the observed profile some physical parameters of the expanding shell are derived.

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