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17 papers · 2 filters
One-dimensional delayed-detonation models of Type Ia supernovae: Confrontation to observations at bolometric maximum
Stéphane Blondin, Luc Dessart, D. John Hillier +1
The delayed-detonation explosion mechanism applied to a Chandrasekhar-mass white dwarf offers a very attractive model to explain the inferred characteristics of Type Ia supernovae…
SDSS 1355+0856: A detached white dwarf + M star binary in the period gap discovered by the SWARMS survey
Carles Badenes, Marten H. van Kerkwijk, Mukremin Kilic +5
SDSS 1355+0856 was identified as a hot white dwarf (WD) with a binary companion from time-resolved SDSS spectroscopy as part of the ongoing SWARMS survey. Follow-up observations wi…
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…
Massive Stars: Key to Solving the Cosmic Puzzle
Aida Wofford, Claus Leitherer, Nolan R. Walborn +8
We describe observations in the nearby universe (<100 Mpc) with a 10-m or larger space-based telescope having imaging and spectral capabilities in the range 912-9000 Åthat would en…
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…