10:20
And we’re off. Ken Nomoto is going to tell us about the “Supernova-Progenitor Connection”.
Supernova density profile is highly dependent on the progenitor: Low mass have steeper envelopes.
8-10 Msun stars: Super AGB stars (Mcore > 1.07) ONeMg core collapse due to electron capture. At above 10.4 Msun, Ne burning is ignited (Ne flash) in degenerate core... leading to mass ejections? (Nomoto 1984) Origin of very bright type II supernovae (Woosley)?
Below 10 Msun: no Ne burning. Degenerate ONeMg core. MONeMg=1.35 Msun. Steep density gradient outside degenerate core.
Electron Capture on ONeMg core: (Miyaji et al. 1980) Electron capture reduces the degenerate electron gas support and leads to collapse. (Picture of Mg lizard eating the e-)
Kitaura et al. (2006) 9Msun star. Neutrino heating causes weak explosion in spherical model (.1FOE). Mej=0.014 Msun. Overproduction of 90Zr (Hoffman et al 2008).
Constraints on Ye (Wanajo et al 2008).
Pastorello et al 2008: Ultra-Faint SNe IIn? M85 OT2006-1 2008S. Also 1997bs, 1999br, etc. (Botticella et al. 2008, Prieto et al. 2008).
10-90 (60)Msun stars: Fe Core Collapse... Asphericity. Nomoto et al 06, Limongi et al 00: general agreement in heavy element production. Also Heger &Woosley 08, Umeda & Nomoto 02, Tominaga 08. Mixing and asymmetry. All differ significantly to observations of metal poor stars. (Cayrel et al 2004). Agreement improved by high energy (10 FOE) asymmetric (Mixed) explosion, Tominaga et al 2006). Jet induced nucleosynthesis (Tominaga et al again). Tominaga et al 2007
Main sequence mass vs Kinetic Energy. Fork diagram. Hypernova branch and Faint SN branch. Also MS mass vs Ni Mass. Again a forked diagram. Ib’s at the branching point?
Hamuy 2003: Trend in Mej & MNi vs E (FOE).
Wolf-Rayet connetion? Ib,Ic. Mass loss vs Angular Momentum loss. ?
SN 2008D. Ib’s bridging the gap between Hypernovae and normal SNe?
90-140 Msun stars: Instability in the core. Oscillations leading to Fe Core collapse. (Umeda & Nomoto) (Near e+e- instability region). 30FOE, 5Msun 56Ni (!)
140-300 Msun stars: Pair Production SNe. Don’t match metal poor stars? Interesting.
SN 2006gy. (13 Msun Ni mass!?!) CSM Interaction? 64FOE, 15M Ni? Light curve not like Pair production supernovae (Fast, not slow).
And we’re off. Ken Nomoto is going to tell us about the “Supernova-Progenitor Connection”.
Supernova density profile is highly dependent on the progenitor: Low mass have steeper envelopes.
8-10 Msun stars: Super AGB stars (Mcore > 1.07) ONeMg core collapse due to electron capture. At above 10.4 Msun, Ne burning is ignited (Ne flash) in degenerate core... leading to mass ejections? (Nomoto 1984) Origin of very bright type II supernovae (Woosley)?
Below 10 Msun: no Ne burning. Degenerate ONeMg core. MONeMg=1.35 Msun. Steep density gradient outside degenerate core.
Electron Capture on ONeMg core: (Miyaji et al. 1980) Electron capture reduces the degenerate electron gas support and leads to collapse. (Picture of Mg lizard eating the e-)
Kitaura et al. (2006) 9Msun star. Neutrino heating causes weak explosion in spherical model (.1FOE). Mej=0.014 Msun. Overproduction of 90Zr (Hoffman et al 2008).
Constraints on Ye (Wanajo et al 2008).
Pastorello et al 2008: Ultra-Faint SNe IIn? M85 OT2006-1 2008S. Also 1997bs, 1999br, etc. (Botticella et al. 2008, Prieto et al. 2008).
10-90 (60)Msun stars: Fe Core Collapse... Asphericity. Nomoto et al 06, Limongi et al 00: general agreement in heavy element production. Also Heger &Woosley 08, Umeda & Nomoto 02, Tominaga 08. Mixing and asymmetry. All differ significantly to observations of metal poor stars. (Cayrel et al 2004). Agreement improved by high energy (10 FOE) asymmetric (Mixed) explosion, Tominaga et al 2006). Jet induced nucleosynthesis (Tominaga et al again). Tominaga et al 2007
Main sequence mass vs Kinetic Energy. Fork diagram. Hypernova branch and Faint SN branch. Also MS mass vs Ni Mass. Again a forked diagram. Ib’s at the branching point?
Hamuy 2003: Trend in Mej & MNi vs E (FOE).
Wolf-Rayet connetion? Ib,Ic. Mass loss vs Angular Momentum loss. ?
SN 2008D. Ib’s bridging the gap between Hypernovae and normal SNe?
90-140 Msun stars: Instability in the core. Oscillations leading to Fe Core collapse. (Umeda & Nomoto) (Near e+e- instability region). 30FOE, 5Msun 56Ni (!)
140-300 Msun stars: Pair Production SNe. Don’t match metal poor stars? Interesting.
SN 2006gy. (13 Msun Ni mass!?!) CSM Interaction? 64FOE, 15M Ni? Light curve not like Pair production supernovae (Fast, not slow).
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