Type II supernovae are created by massive stars with extended envelopes. When the supernova shock breaks out of such a star, it creates a collisionless shock which may accelerate protons above 10 …

Jul 1, 2023 · A spectral classification scheme of Type II supernovae (SNe II) is proposed based on the phase relative to the maximum light in the V band and the end of the plateau phase. We utilize a …

Type II and type Ia supernovae provide the dominant sites in which this “explosive nucleosynthesis” mechanism is known to operate. These two supernova sites operate on distinctively different …

Nov 15, 2023 · Abstract Type II supernovae represent the most common stellar explosions in the Universe, for which the final stage evolution of their hydrogen-rich massive progenitors towards core …

Jan 9, 2008 · 1 Introduction The initial state that leads to a type-II (or type-Ib or type-Ic) supernova is essentially an iron white dwarf (the endpoint of nuclear fusion reactions) in the center of a massive …

Nov 15, 2023 · Abstract Type II supernovae represent the most common stellar explosions in the Universe, for which the final stage evolution of their hydrogen-rich massive progenitors towards core …

Type II supernovae are associated with the core collapse of a massive star together with a shock-driven expansion of a luminous shell which leaves behind a rapidly rotating neutron star or, if the core has …

Jan 9, 2008 · The astronomical classification distinguishes two main types based on their spectra: in Type I supernovae no hydrogen lines are seen in the spectrum while Type II supernovae (making up …

Core-collapse supernovae are especially diverse in their UV properties, with hydrogen-dominated type II supernovae typically being UV-bright for significant periods of time and the radioactively-powered …

Apr 1, 1999 · The principal effects of evolution in a close binary system on the progenitor of a Type II supernova can be broadly divided into three categories (Podsiadlowski et al., 1992; hereafter PJH): …