Explosive Ideas about Massive Stars - from Observations to Modeling

Session

Explosion mechanism

05

11 Aug 2011, 08:30

Oskar Klein (AlbaNova University Center)

Conveners

Explosion mechanism: A. Burrows, "On the Mechanism of Core-Collapse Supernova Explosions"

• There are no conveners in this block

Explosion mechanism: J. Blondin, "Hydrodynamics of core collapse"

• There are no conveners in this block

Explosion mechanism: H.-T. Janka, "Modeling core-collapse explosions"

• There are no conveners in this block

Explosion mechanism: F. Thielemann, "Radioactivity and nucleosynthesis as probes of explosion models"

• There are no conveners in this block

Explosion mechanism: K. Nomoto, "The hypernova-GRB connection"

• There are no conveners in this block

Explosion mechanism: E. Nakar, "Newtonian and Relativistic Shock Breakouts"

• There are no conveners in this block

Explosion mechanism

• Roger Chevalier (Univ. of Virginia)

298. On the Mechanism of Core-Collapse Supernova Explosions

Prof. Adam Burrows (Princeton University)

11/08/2011, 08:30

Core-collapse supernovae are a puzzle that has taxed theorists and computational science for half a century. Such explosions are the source of many of the heavy elements in the Universe and the birthplace of neutron stars and stellar-mass black holes. However, determining the mechanism of explosion remains the key goal of theory. Recently, using sophisticated numerical tools and...

326. Hydrodynamics of Core Collapse

John Blondin (North Carolina State University)

11/08/2011, 09:00

A core-collapse supernova event begins with a nearly spherical hydrodynamic implosion of the core of a massive star and ends with a hydrodynamic explosion as an aspherical shock wave expands through the stellar envelope. The breaking of spherical symmetry is both critical for driving the explosion as well as determining the characteristics of the supernova. The origin of asymmetry may...

381. Modeling core-collapse explosions

Dr H.-T. Janka (MPI, Garching)

11/08/2011, 09:30

The talk will review 2D and 3D modeling of core-collapse supernova explosions by the Garching group. It will address the question of the explosion mechanism and the role of relativistic effects, of the neutron star equation of state, and of dimensionality (2D vs. 3D) in this context. Observational consequences of the explosion mechanism will also be discussed.

383. Radioactivity and nucleosynthesis as probes of explosion models

F. Thielemann (Dept. of Physics, University of Basel)

11/08/2011, 10:30

Supernovae are observationally characterized by their lightcurves, spectra, late time radioactivities in remnants and their integrated contribution to chemical evolution, witnessed in observations of old stars. We will highlight open questions with respect to nucleosynthesis contributions from core collapse supernovae. While many aspects of intermediate mass (alpha) elements...

376. The hypernova-GRB connection

Prof. Ken Nomoto (IPMU, University of Tokyo)

11/08/2011, 11:00

The properties of supernovae associated with GRBs & XRFs, and some other related supernovae are summarized. Discussion includes the possible connection to the unusual supernovae, such as extremely luminous and extremely faint supernovae. The abundance patterns predicted in their nucleosynthesis are compared with those of metal-poor halo stars, DLAs, and other related objects.

309. Newtonian and Relativistic Shock Breakouts

Dr Ehud Nakar (Tel Aviv University)

11/08/2011, 13:00

Observations of SNe light at early times can open a window to a wealth of information on the progenitor system and the explosion itself. I will present the theoretical expectation of that emission, starting at the shock breakout, through the planar phase and into at the spherical phase, until recombination and/or radioactive decay start playing a role. I will discuss separately Newtonian...