Stripped Core-Collapse SNe: First Large and Systematic Spectroscopic Data Set

Details Stripped Core-Collapse SNe: First Large and Systematic Spectroscopic Data Set Stripped Core-Collapse SNe: First Large and Systematic Spectroscopic Data Set

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21912604m&link_type=abstract

American Astronomical Society, AAS Meeting #219, #126.04

Astronomy and Astrophysics

Astrophysics

Scientific paper

The study of Stripped-Envelope Core-Collapse SNe (Stripped SNe) is vital for a number important areas in astrophysics, from understanding the diverse deaths of massive stars, to the connection between SNe and Long-duration Gamma-ray bursts to quantifying and excluding contaminants in high-z SNe Ia searches for cosmology. However, the study of Stripped SNe has been confined to a handful of well-observed individual objects that happened to be nearby or peculiar. While the SNe Ic-bl associated with long Gamma Ray Bursts (GRBs) have been studied in detail, the full range of properties of normal or broad-lined SNe is not known, nor their dominant progenitor channel and the productions conditions that lead to different kinds of explosions in massive stars. Stripped-envelope core-collapse supernovae (i.e., SNe of Type IIb, Ib, Ic and broad-lined Ic) are supernovae whose massive progenitors have been stripped of progressively larger amounts of their hydrogen and helium envelopes.
Here, I present densely time-sampled and homogeneous spectroscopic data of about 30 supernovae of Type IIb, Ib, Ic and Ic-bl, which triples the world supply of well-observed Stripped SNe. I will also discuss the analysis of their spectra and those from the literature in form of a systematic and statistically thorough fashion. I will also briefly mention the most recent results on SN environments, specifically on measured metallities, and what they may tell us about the progenitors of Stripped SNe.

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