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Radiative Properties of Pair-instability Supernova Explosions
Luc Dessart, Roni Waldman, Eli Livne +2
We present non-LTE time-dependent radiative-transfer simulations of pair-instability supernovae (PISNe) stemming from red-supergiant (RSG), blue-supergiant (BSG) and Wolf-Rayet (WR…
A companion as the cause of latitude-dependent effects in the wind of Eta Carinae
Jose H. Groh, Thomas I. Madura, D. J. Hillier +2
We analyze spatially resolved spectroscopic observations of the Eta Carinae binary system obtained with HST/STIS. Eta Car is enshrouded by the dusty Homunculus nebula, which scatte…
Obscured clusters.IV. The most massive stars in [DBS2003]179
J. Borissova, L. Georgiev, M. M. Hanson +6
Aims. We report new results for the massive evolved and main sequence members of the young galactic cluster DBS2003 179. We determine the physical parameters and investigate the hi…
Super-luminous supernovae: 56Ni power versus magnetar radiation
Luc Dessart, D. John Hillier, Roni Waldman +2
Much uncertainty surrounds the origin of super-luminous supernovae (SNe). Motivated by the discovery of the Type Ic SN2007bi, we study its proposed association with a pair-instabil…
The influence of rotation on optical emission profiles of O stars
D. John Hillier, Jean-Claude Bouret, Thierry Lanz +1
We study the formation of photospheric emission lines in O stars and show that the rectangular profiles, sometimes double peaked, that are observed for some stars are a direct cons…
On the nature of supernovae Ib and Ic
Luc Dessart, D. John Hillier, Chengdong Li +1
Using non-LTE time-dependent radiative-transfer calculations, we study the impact of mixing and non-thermal processes associated with radioactive decay on SN IIb/Ib/Ic light curves…