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Scientific Rationale

In the framework of the NIC2018 conference GSSI-Gran Sasso Science Institute, INAF-Osservatorio Astronomico d’Abruzzo and INFN-Laboratori Nazionali del Gran Sasso organise a satellite workshop on

Core-collapse Supernovae in the Multi-messenger Era.

Core-collapse supernovae are among the most powerful events observed in the Universe. It has been early recognized that under certain conditions the iron-rich core of a massive star collapse forming a compact central object-a neutron star, a black hole or, possibly, a quark star. As a consequence, the bounce of the material falling on the top of the compact core may lead to a dramatic explosion. Core-collapse Supernovae (CCSN) play a key role in the synthesis of the chemical elements, may induce the formation of new stars, and are closely related to long-gamma-ray bursts events. In spite of the remarkable progress made in the past decades by theoretical studies of this class of supernovae, the mechanism of explosion is still uncertain. Indeed the total gravitational energy released to allow the formation of the compact object by CCSN events, about 1053 ergs, is mostly converted and trapped into neutrinos, and only ~1% of this energy is necessary to drive the explosion and to explain the observed electromagnetic emission.  Actually, the available numerical models suggest that neutrino-powered explosions, alone, might likely explain CCSN from less-massive progenitor stars, but not from those with larger core mass and/or the most energetic events.

The only possibility to get direct information about the CCSN engine is from observations of neutrinos emitted by the forming neutron star, and through gravitational waves which are emitted when the collapse does not proceed perfectly symmetrically because of rotation, of violent turbulent mass motions, and/or of anisotropic neutrino emission. The scientific community must be ready for the observation of a nearby (galactic) supernova explosion.  This two-day workshop aims to review the present state-of-the-art in CCSN modelling and in multi-messenger observations, including signals delivered by  photons, neutrinos and gravitational waves.

List of topics:

  • Theory, from progenitor to the supernova
  • Understanding of the CCSN engine: new physics or more complexity?
  • Astronomical studies and multi-messenger physics
  • Long Gamma-ray bursts and supernova connections
  • Supernova neutrinos
  • Gravitational waves from CCSNe