e-journal

Core-collapse supernovae: Reflections and directions

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Core-collapse supernovae are among the most fascinating phenomena in astrophysics and provide
a formidable challenge for theoretical investigation. They mark the spectacular end of the
lives of massive stars and, in an explosive eruption, release as much energy as the sun produces
during its whole life. A better understanding of the astrophysical role of supernovae as birth
sites of neutron stars, black holes, and heavy chemical elements, and more reliable predictions
of the observable signals from stellar death events are tightly linked to the solution of the longstanding
puzzle of how collapsing stars achieve explosion. In this article our current knowledge
of the processes that contribute to the success of the explosion mechanism is concisely reviewed.
After a short overview of the sequence of stages of stellar core-collapse events, the general
properties of progenitor-dependent neutrino emission will be briefly described. Applying sophisticated
neutrino transport in axisymmetric (2D) simulations with general relativity as well as in
simulations with an approximate treatment of relativistic effects, we can find successful neutrinodriven
explosions for a growing set of progenitor stars. The first results of three-dimensional (3D)
models have been obtained, and magnetohydrodynamic simulations demonstrate that strong initial
magnetic fields in the pre-collapse core can foster the onset of neutrino-powered supernova
explosions even in nonrotating stars. These results are discussed in the context of the present controversy
about the value of 2D simulations for exploring the supernova mechanism in realistic
3D environments, and they are interpreted against the background of the current disagreement
on the question of whether the standing accretion shock instability (SASI) or neutrino-driven
convection is the crucial agency that supports the onset of the explosion.

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Informasi Detail

Judul Seri

Prog. Theor. Exp. Phys.

No. Panggil

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Penerbit

Oxford : Oxford University Press on behalf of the Physical Society of Japan., 2012

Deskripsi Fisik

Prog. Theor. Exp. Phys. 2012, 01A309 (33 pages)

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

FISIKA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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