Speaker
Dr
Leloudas Giorgos
(Dark cosmology Centre)
Description
Stripped-envelope core-collapse SNe are supposed to result
from the explosions of
stars that have lost their outer hydrogen layers but the
exact nature of their
progenitor and (possible) companion stars remains unknown.
By comparing their
locations to those of WR stars we show that they are indeed
compatible. Furthermore,
SN Ib locations are more closely related to those of WN
stars, while those of SNe Ic
to those of WC stars, as expected by theory. Based on
spectra obtained at 20
explosion sites, there is a possible trend for SNe Ic to
occur at slightly more
metal-rich environments than SNe Ib (by 0.08 dex). By
placing limits to the ages of
the youngest stars in the explosion regions (under the
assumption of instantaneous
star formation) and comparing with the lifetimes of single
massive stars, we conclude
that a fraction of these explosions is the outcome of binary
evolution.
Primary author
Dr
Leloudas Giorgos
(Dark cosmology Centre)
