Master Project MAC

28 mai 2020, 15:00 → 6 nov. 2020, 19:00 Europe/Paris

Francesca Gulminelli (LPC/Ensicaen)

Modélisation des Astres Compacts    

Le but de ce projet est de fournir des prédictions quantitatives des paramètres clé qui gouvernent l’émission de signaux mesurables émis des objets compacts, sur la base des incertitudes associées à la microphysique subjacente. Trois différentes phénoménologies seront étudiées:

1. L’émission d’OG à partir de binaires d’étoiles à neutrons et les paramètres associés (tidal polarizability, r-modes). Dans ce cas les incertitudes dominantes sont dues à la modélisation de l’EoS, et des possibles transitions de phase de la matière dense.
2. La dynamique du collapse des CCSN et l’estimation du spectre neutrino émis, avec un traitement unifié de l’EoS et de la distribution des noyaux à l’équilibre thermodynamique. Les sources d’incertitude résident alors dans le modèle de masse nucléaire et dans les taux de EC.    
3. Le refroidissement des étoiles à neutrons et la cristallisation de la croûte. Pour ces phénomènes les incertitudes dans la modélisation dérivent à la fois de l’EoS (pour les étoiles isolées ou non-isolées) et des propriétés de surface des noyaux très riches en neutrons.

Au niveau international d'autres efforts similaires existent, mais cette collaboration est la seule à impliquer directement des expérimentateurs en physique nucléaire et à se proposer de susciter des propositions d'expériences en physique nucléaire expérimentale. 

 

   

Join the meeting : https://greenlight.lal.cloud.math.cnrs.fr/b/gul-e7r-32t

http://www.lpc-caen.in2p3.fr/article527.html

SESSIONS 2021

Contact Collaboration : MAC-L@IN2P3.FR

Work documents :                    

jeudi 28 mai

15:00 → 17:00 Inhomogeneous matter: modeling impurities

Orateur: Francesca Gulminelli (LPC/Ensicaen)

jeudi 11 juin

15:00 → 17:00 Introduction to the PNJL model

Orateur: Hubert Hansen (IPNL)

jeudi 2 juillet

15:00 → 17:00 Neutrino reaction rates

Orateur: Micaela Oertel (LUTH, Observatoire de Paris)

jeudi 16 juillet

15:00 → 17:00 Crystallization of the neutron star crust

Orateur: Anthea Fantina (GANIL, Caen)

jeudi 10 septembre

15:00 → 17:00 Towards an extended meta-modeling of dense matter including phase transitions: the case of quarkyonic matter

I will present a recent modeling of the baryon/quark phase transition suggesting a smooth cross-over instead of the usual sharp first-order phase transition. This model was first suggested by Reddy and McLeran in 2019 for symmetric and neutron matter, and has recently been extended to asymmetric matter supposing a isoscalar dynamical symmetry between nucleons and quarks. This new model has been incorporated into the nuclear meta-model, including an extension to relativistic kinematics. It presents several features which are interesting to investigate, e.g. peak in the sound speed density profile, or an increase of the compact star radius at the onset of the phase transition.

Orateur: Jérôme Margueron (CNRS/IN2P3 - IP2I - Lyon)

jeudi 1 octobre

15:00 → 17:00 From dilute matter to the equilibrium point in the energy-density-functional theory: EFT-inspired functionals applied to neutron drops, nuclei and stellar matter

Orateurs: Marcella Grasso (IJCLab), Stefano Burrello (IJCLab)

jeudi 22 octobre

15:00 → 17:00 Neutron rich systems in mean field models

The discussion is divided into two parts. In the first part, I will try to summarize different correlation studies
concerning the density dependence of symmetry energy and how it affects in the isovector part of the nuclear
interaction and neutron rich physical observables or vice versa. Zero-range relativistic and non-relativistic models
were employed to perform these studies. In the second part, I will try to summarize study of inner crust of neutron
stars (and eventually a unified EoS) in the framework of finite-range Gogny models.

Orateur: Chiranjib Mondal (LPC Caen)

jeudi 29 octobre

15:00 → 17:00 Partially accreted crust of neutron stars

Neutron stars in binary systems may accrete matter from their companion star ; so far, only the case of a crust fully replaced by accreted matter has been considered in detailed calculations. However if the star has only accreted a small amount of matter, the crust is not fully but only partially accreted. This could be for example the case of IGR J17480−2446, which could indicate that it has a partially accreted crust which nuclear and thermal properties could be different from the ones of a fully accreted crust. We propose a model of partially accreted crusts for which we follow the originally catalyzed crust as it undergoes an increase in pressure due to the above accreted material falling at the surface. We study different properties of partially accreted crust, additional energy sources and discuss differences with respect to calalyzed and fully accreted crust.

Orateur: Lami Suleiman (LUTH-OBSPM)

mercredi 4 novembre

13:00 → 16:00 New-MAC Workshop: Finite temperature equation of state (impurities, crystallisation of the neutron-star crust)

Online workshop of the New-MAC project.
The meeting is intended to be mainly devoted to discussions. Although no formal presentations are required, we kindly ask the participants to prepare a few slides to briefly summarise the subject already presented during the webinar and another slide or two to guide the discussion around your topic (5-10 minutes). We have suggested some names for the presenters and (additional) topics for each topical section. For those who have not yet presented a webinar, please write to us and tell us if you agree to animate the discussion (1-2 slides on your present research) in the topical session where we have put your name.

Président de session: Anthea Francesca FANTINA ({CNRS}UPR3266)

13:00 Modelling impurities and pasta phases

Orateur: Francesca Gulminelli (LPC/Ensicaen)

13:20 Crystallisation of neutron-star crust

Orateur: Anthea Francesca FANTINA ({CNRS}UPR3266)

13:40 Statistical treatment of nuclear clusters

Orateur: Swagata Mallik Mallik (LPC Caen)

14:00 Electron-capture rates

https://ui.adsabs.harvard.edu/abs/2020arXiv200608803R/abstract

Orateurs: Elias Khan (IPN Orsay), Anthea Francesca FANTINA ({CNRS}UPR3266)

15:00 ROUND TABLE

theory within Virgo: present status
MAC report
ANR submission
miscellanea

jeudi 5 novembre

08:30 → 11:30 New-MAC Workshop: Low-density regime : Neutron-star crust physics and connection with nuclear observables (e.g. pairing, collective modes)

Online workshop of the New-MAC project.
The meeting is intended to be mainly devoted to discussions. Although no formal presentations are required, we kindly ask the participants to prepare a few slides to briefly summarise the subject already presented during the webinar and another slide or two to guide the discussion around your topic (5-10 minutes). We have suggested some names for the presenters and (additional) topics for each topical section. For those who have not yet presented a webinar, please write to us and tell us if you agree to animate the discussion (1-2 slides on your present research) in the topical session where we have put your name.

Président de session: Francesca Gulminelli (LPC/Ensicaen)

08:30 Energy-density functionals at low density

Orateurs: Marcella Grasso (IJCLab), Stefano Burrello (IJCLab)

09:15 Mean-field models and neutron-rich systems

Orateur: Chiranjib Mondal (LPC Caen)

10:00 Transport in heavy-ion reactions

Orateur: Swagata Mallik Mallik (LPC Caen)

10:35 Constraints on the nuclear symmetry energy from asymmetric-matter calculations with chiral NN and 3N interactions

Orateur: Rahul Somasundaram (IP2I Lyon)

13:00 → 16:00 New-MAC Workshop: Supernova and neutron-star dynamics (proto-neutron star formation, cooling, accretion, neutrinos)

Online workshop of the New-MAC project.
The meeting is intended to be mainly devoted to discussions. Although no formal presentations are required, we kindly ask the participants to prepare a few slides to briefly summarise the subject already presented during the webinar and another slide or two to guide the discussion around your topic (5-10 minutes). We have suggested some names for the presenters and (additional) topics for each topical section. For those who have not yet presented a webinar, please write to us and tell us if you agree to animate the discussion (1-2 slides on your present research) in the topical session where we have put your name.

Président de session: Micaela Oertel (LUTH, Observatoire de Paris)

13:00 Partially accreted neutron-star crust

Orateur: Lami Suleiman (LUTH-OBSPM)

14:30 Neutrino reaction rates

Orateur: Micaela Oertel (LUTH, Observatoire de Paris)

14:50 Proto-neutron star modes and nuclear matter equation of state

Orateur: Jérôme Novak (LUTH, CNRS - Observatoire de Paris)

15:10 TBA

Orateur: Aurélien Pascal (Luth, Observatoire de Paris)

vendredi 6 novembre

08:30 → 11:30 New-MAC Workshop: High-density regime: Neutron-star core physics and connection with gravitational-waves observables (phase transitions, quarks, quarkyonic matter)

Online workshop of the New-MAC project.
The meeting is intended to be mainly devoted to discussions. Although no formal presentations are required, we kindly ask the participants to prepare a few slides to briefly summarise the subject already presented during the webinar and another slide or two to guide the discussion around your topic (5-10 minutes). We have suggested some names for the presenters and (additional) topics for each topical section. For those who have not yet presented a webinar, please write to us and tell us if you agree to animate the discussion (1-2 slides on your present research) in the topical session where we have put your name.

Président de session: Jérôme Margueron (CNRS/IN2P3 - IP2I - Lyon)

08:30 PNJL model

Orateur: Hubert Hansen (IPNL)

08:50 Quarkyonic matter

Orateur: Jérôme Margueron (CNRS/IN2P3 - IP2I - Lyon)

09:10 TBA

Orateur: guy chanfray (IPN Lyon)

09:30 TBA

Orateur: Rahul Somasundaram (IP2I Lyon)

09:50 TBA

Orateur: Hasim Guven (IPN-Orsay)

10:10 TBA

Orateur: Dr Guilherme Grams (ip2i)

10:30 TBA

Orateur: Chiranjib Mondal (LPC Caen)