We discuss results of analyzing a time series of selected photospheric-optical spectra of core collapse supernovae (CCSNe). This is accomplished by means of the parameterized supernovae synthetic spectrum (SSp) code ``SYNOW''. Special attention is addressed to traces of hydrogen at early phases, especially for the stripped-envelope SNe (i.e. SNe Ib-c). A thin low mass hydrogen layer extending to very high ejection velocities above the helium shell, is found to be the most likely scenario for Type Ib SNe.
@article{arxiv.astro-ph/0611182,
title = {Hydrogen issue in Core Collapse Supernovae},
author = {A. Elmhamdi and I. J. Danziger and D. Branch and B. Leibundgut},
journal= {arXiv preprint arXiv:astro-ph/0611182},
year = {2016}
}
Comments
8 pages. Proceedings of the conference ``The Multicoloured Landscape of Compact Objects and their Explosive Origins'', 2006 June 11--24, Cefalu, Sicily, to be published by AIP