26ème Congrès Général de la SFP

Session

Mini-colloques: MC11 La matière nucléaire : du laboratoire au cosmos

4 juil. 2023, 08:30

Centre des Congrès de la Villette (Cité des sciences et de l'Industrie, Paris)

192. Probing the equation of state of dense matter with neutron stars: constraints from nuclear physics

Anthea Francesca Fantina (Grand Accélérateur National d'Ions Lourds (GANIL))

04/07/2023 08:30

MC11 La matière nucléaire : du laboratoire au cosmos

Contribution orale

Neutron stars are unique laboratories to probe matter in extreme conditions that cannot be currently reproduced on Earth. Nuclear physics experiments, in tandem with astrophysical observations, can give valuable insight into the properties of dense matter encountered in these stellar objects.

In this contribution, various constraints on the equation of state of dense matter will be...

41. La matière nucléaire : contraintes expérimentales avec le couplage INDRA-FAZIA au GANIL

Diego GRUYER (LPC Caen)

04/07/2023 08:49

MC11 La matière nucléaire : du laboratoire au cosmos

Contribution orale

The study of fragmentation reactions produced in heavy-ion collisions has permitted major advances in the understanding of the dynamics and thermodynamics of nuclear matter and is still one of the most promising tools to constrain its equation of state. This fundamental property in nuclear physics is also a crucial ingredient in the understanding of various astrophysical objects or phenomenon:...

203. The proto-neutron star inner crust in a multi-component plasma approach

Hoa Dinh Thi (LPC Caen)

04/07/2023 09:08

MC11 La matière nucléaire : du laboratoire au cosmos

Contribution orale

Proto-neutron stars are born hot, with temperatures exceeding few $10^{10} $K. In these conditions, the crust of the proto-neutron star is expected to be made of a Coulomb liquid and composed of an ensemble of different nuclear species. In this work, we perform a study of the beta-equilibrated proto-neutron-star crust in the liquid phase in a self-consistent multi-component approach, which...

208. Numerical modeling of core-collapse supernovae and neutron star formation

Matteo Bugli (UniTo - CEA Saclay)

04/07/2023 09:22

MC11 La matière nucléaire : du laboratoire au cosmos

Contribution orale

The gravitational collapse of massive stars that reach the end of their lives leads to the onset of powerful core-collapse supernova (CCSN) explosions that can be observed at cosmological distances.
Moreover, these events are the main formation sites of neutron stars and black holes of stellar size, which are not only unique laboratories to study the properties of matter in extreme physical...

323. Etude de la matière hadronique dense en collisions d’ions lourds

Béatrice Ramstein

04/07/2023 09:41

MC11 La matière nucléaire : du laboratoire au cosmos

Contribution orale

Les collisions d’ions lourds sont un outil unique pour étudier les propriétés de la matière hadronique, régies par la Chromodynamique Quantique (QCD), la théorie fondamentale de l’interaction forte. Suivant l’énergie des faisceaux, différentes régions du diagramme de phase de la QCD, en termes de température (T) et potentiel baryochimique (muB) peuvent être explorées.
Pour des grandes...

256. Heavy-Ion collisions and the low-density neutron star equation of state

Rémi BOUGAULT (LPCCaen/ENSICaen)

04/07/2023 10:00

MC11 La matière nucléaire : du laboratoire au cosmos

Contribution orale

Light nuclear clusters are expected to be ubiquitously present in astrophysical environments and play an important role in different astrophysical phenomena, but the estimation of their abundancy requires to correctly estimate the in-medium modification of their binding energy. This can be achieved in a phenomenological way, if theoretical models are calibrated to experimental data from...

218. Magnetic fields and pasta phases reexamined

Luigi Scurto (University of Coimbra, LPC Caen)

04/07/2023 10:14

MC11 La matière nucléaire : du laboratoire au cosmos

Contribution orale

In this work, we compute the structure and composition of the inner crust of a neutron star in the presence of a strong magnetic field, such as it can be found in magnetars.
To determine the geometry and characteristics of the crust inhomogeneities, we consider the compressible liquid drop model, where surface and Coulomb terms are included in the variational equations, and we compare our...