Nebular emission-line profiles of Type Ib/c supernovae - probing the ejecta asphericity
Nebular emission-line profiles of Type Ib/c supernovae - probing the ejecta asphericity
In order to assess qualitatively the ejecta geometry of stripped-envelope core-collapse supernovae, we investigate 98 late-time spectra of 39 objects, many of them previously unpublished. We perform a Gauss-fitting of the [O I] 6300, 6364 feature in all spectra, with the position, full width at half maximum (FWHM) and intensity …