Descrizione del progetto
Un nuovo approccio computazionale per lo studio della fusione di stelle di neutroni
La prima fusione di stelle di neutroni è stata osservata nel 2017 dai rilevatori LIGO e Virgo e ha segnato una svolta significativa per l’astronomia multi-messaggero. Il progetto INSPIRATION, finanziato dall’UE, si propone di integrare all’interno di un unico modello sia le onde gravitazionali che la radiazione elettromagnetica, all’origine delle quali vi sono processi completamente diversi. I ricercatori applicheranno un’innovativa metodologia computazionale di recente sviluppo: il primo codice idrodinamico relativistico lagrangiano al mondo che risolve inoltre le equazioni di Einstein in modo coerente. Lo studio fornirà per la prima volta strutture fisiche dettagliate di fisica sul lungo termine relative alla fusione e all’onda gravitazionale, nonché ai segnali elettromagnetici e di neutrini.
Obiettivo
"Recent years have seen the blossoming of multi-messenger astrophysics where gravitational waves, photons and neutrinos provide complementary views on cosmic explosions involving some of the Universe’s most enigmatic objects, namely neutron stars and black holes. The first observation of a neutron star merger via both gravitational waves and, days later, an electromagnetic flash called ""kilonova"" enabled huge scientific leaps forward and was therefore celebrated as ""2017 Breakthrough of the Year"". Multi-messenger astrophysics has an enormous potential to solve many longstanding puzzles such as the origin of the heaviest elements or the nature of the densest matter in the Universe, provided that we understand how the different messengers are physically connected. The gravitational wave and electromagnetic emission stages, however, involve vastly different length and time scales and completely different physical processes. Therefore, currently strong assumptions need to be made how both stages are actually physically connected. On the verge of this transformational era of physics, I propose to calculate for the first time the evolution from the inspiral (milliseconds before the merger) to the time after the kilonova (months later) within a common simulation framework. This will become possible via the novel computational methodology that I have recently developed: the world-wide first Lagrangian hydrodynamics code that also consistently solves Einstein's equations. Compared to conventional Numerical Relativity codes, my new development has major advantages in evolving the merger ejecta which finally cause the kilonova. This project will provide for the first time detailed physical structures of neutron star merger remnants and the first one-to-one mapping between the physics of the merger and the gravitational wave, neutrino and electromagnetic signals. This will present a major breakthrough for both the nuclear astrophysics and the multi-messenger communities."
Campo scientifico
Programma(i)
- HORIZON.1.1 - European Research Council (ERC) Main Programme
Argomento(i)
Meccanismo di finanziamento
ERC - Support for frontier research (ERC)Istituzione ospitante
20148 Hamburg
Germania