Master Project MAC

Europe/Paris
Francesca Gulminelli (LPC/Ensicaen)
Description

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

Contact Collaboration : MAC-L@IN2P3.FR

Work documents :                    

    • 16:00 18:00
      Introduction to the PNJL model 2h
      Speaker: Hubert Hansen (IPNL)
    • 16:00 18:00
      Towards an extended meta-modeling of dense matter including phase transitions: the case of quarkyonic matter 2h

      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.

      Speaker: Jérôme Margueron (CNRS/IN2P3 - IP2I - Lyon)
    • 16:00 18:00
      From dilute matter to the equilibrium point in the energy-density-functional theory: EFT-inspired functionals applied to neutron drops, nuclei and stellar matter 2h
      Speakers: Marcella Grasso (IJCLab), Stefano Burrello (IJCLab)
    • 16:00 18:00
      Neutron rich systems in mean field models 2h

      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.

      Speaker: Chiranjib Mondal (LPC Caen)
    • 16:00 18:00
      Partially accreted crust of neutron stars 2h

      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.

      Speaker: Lami Suleiman (LUTH-OBSPM)
    • 14:00 17:00
      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.

      Convener: Anthea Francesca FANTINA ({CNRS}UPR3266)

      Report on the “Modélisation des Astres Compacts”

      (New-MAC) meeting

      04 – 06 November 2020 (online)

       

       

      The meeting of the IN2P3 Master project “Modélisation des Astres Compacts” (New-MAC) took place on November 4th to 6th. Originally planned to be organised at LCP Caen, due to the current situation, it finally took place remotely (online).

      The meeting was intended to be mainly devoted to discussions. For each topic, participants briefly summarised the subject they have already presented during MAC webinars and/or introduced ongoing projects to guide the discussion. About 15 participants attended each session. The program is given here below (see also the website of the New-MAC project for presentations and references: https://indico.in2p3.fr/event/21849/).

      Four main points were identified as possible subjects for further discussions and possible collaborations among the participants:

       

      • Low density regime:
        • Use of calibrated functionals vs meta-model, treatment of pairing
      • Finite temperature equation of state (EoS): 
        • EoS in beta equilibrium vs general purpose EoS; 
        • Addition of free proton gas and excited states in current EoS models for (proto-)neutron stars,
        • treatment of cluster distributions for general purpose EoS,
        • phase transitions at high density.
      • Electron-capture (EC) rates and core-collapse supernova simulations.
        • Extensive calculations on a (relatively large) pool of nuclei vs parametrization
        • ways to refine current parametrizations of the EC rates.
      • Transport models:
        • better treatment of momentum dependence

       

      Dedicated and more focused (online) meetings will be organised as follow-up of the discussions on these specific topics.

       

      • 14:00
        Modelling impurities and pasta phases 20m
        Speaker: Francesca Gulminelli (LPC/Ensicaen)
      • 14:20
        Crystallisation of neutron-star crust 20m
        Speaker: Anthea Francesca FANTINA ({CNRS}UPR3266)
      • 14:40
        Statistical treatment of nuclear clusters 20m
        Speaker: Swagata Mallik Mallik (LPC Caen)
      • 15:00
        Electron-capture rates 30m

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

        Speakers: Elias Khan (IPN Orsay), Anthea Francesca FANTINA ({CNRS}UPR3266)
      • 16:00
        ROUND TABLE 1h

        theory within Virgo: present status
        MAC report
        ANR submission
        miscellanea

    • 09:30 12:30
      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.

      Convener: Francesca Gulminelli (LPC/Ensicaen)

      Report on the “Modélisation des Astres Compacts”

      (New-MAC) meeting

      04 – 06 November 2020 (online)

       

       

      The meeting of the IN2P3 Master project “Modélisation des Astres Compacts” (New-MAC) took place on November 4th to 6th. Originally planned to be organised at LCP Caen, due to the current situation, it finally took place remotely (online).

      The meeting was intended to be mainly devoted to discussions. For each topic, participants briefly summarised the subject they have already presented during MAC webinars and/or introduced ongoing projects to guide the discussion. About 15 participants attended each session. The program is given here below (see also the website of the New-MAC project for presentations and references: https://indico.in2p3.fr/event/21849/).

      Four main points were identified as possible subjects for further discussions and possible collaborations among the participants:

       

      • Low density regime:
        • Use of calibrated functionals vs meta-model, treatment of pairing
      • Finite temperature equation of state (EoS): 
        • EoS in beta equilibrium vs general purpose EoS; 
        • Addition of free proton gas and excited states in current EoS models for (proto-)neutron stars,
        • treatment of cluster distributions for general purpose EoS,
        • phase transitions at high density.
      • Electron-capture (EC) rates and core-collapse supernova simulations.
        • Extensive calculations on a (relatively large) pool of nuclei vs parametrization
        • ways to refine current parametrizations of the EC rates.
      • Transport models:
        • better treatment of momentum dependence

       

      Dedicated and more focused (online) meetings will be organised as follow-up of the discussions on these specific topics.

       

      • 09:30
        Energy-density functionals at low density 40m
        Speakers: Marcella Grasso (IJCLab), Stefano Burrello (IJCLab)
      • 10:15
        Mean-field models and neutron-rich systems 20m
        Speaker: Chiranjib Mondal (LPC Caen)
      • 11:00
        Transport in heavy-ion reactions 30m
        Speaker: Swagata Mallik Mallik (LPC Caen)
      • 11:35
        Constraints on the nuclear symmetry energy from asymmetric-matter calculations with chiral NN and 3N interactions 30m
        Speaker: Rahul Somasundaram (IP2I Lyon)
    • 14:00 17:00
      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.

      Convener: Micaela Oertel (LUTH, Observatoire de Paris)

      Report on the “Modélisation des Astres Compacts”

      (New-MAC) meeting

      04 – 06 November 2020 (online)

       

       

      The meeting of the IN2P3 Master project “Modélisation des Astres Compacts” (New-MAC) took place on November 4th to 6th. Originally planned to be organised at LCP Caen, due to the current situation, it finally took place remotely (online).

      The meeting was intended to be mainly devoted to discussions. For each topic, participants briefly summarised the subject they have already presented during MAC webinars and/or introduced ongoing projects to guide the discussion. About 15 participants attended each session. The program is given here below (see also the website of the New-MAC project for presentations and references: https://indico.in2p3.fr/event/21849/).

      Four main points were identified as possible subjects for further discussions and possible collaborations among the participants:

       

      • Low density regime:
        • Use of calibrated functionals vs meta-model, treatment of pairing
      • Finite temperature equation of state (EoS): 
        • EoS in beta equilibrium vs general purpose EoS; 
        • Addition of free proton gas and excited states in current EoS models for (proto-)neutron stars,
        • treatment of cluster distributions for general purpose EoS,
        • phase transitions at high density.
      • Electron-capture (EC) rates and core-collapse supernova simulations.
        • Extensive calculations on a (relatively large) pool of nuclei vs parametrization
        • ways to refine current parametrizations of the EC rates.
      • Transport models:
        • better treatment of momentum dependence

       

      Dedicated and more focused (online) meetings will be organised as follow-up of the discussions on these specific topics.

       

      • 14:00
        Partially accreted neutron-star crust 1h
        Speaker: Lami Suleiman (LUTH-OBSPM)
      • 15:30
        Neutrino reaction rates 20m
        Speaker: Micaela Oertel (LUTH, Observatoire de Paris)
      • 15:50
        Proto-neutron star modes and nuclear matter equation of state 20m
        Speaker: Jérôme Novak (LUTH, CNRS - Observatoire de Paris)
      • 16:10
        TBA 20m
        Speaker: Aurélien Pascal (Luth, Observatoire de Paris)
    • 09:30 12:30
      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.

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

      Report on the “Modélisation des Astres Compacts”

      (New-MAC) meeting

      04 – 06 November 2020 (online)

       

       

      The meeting of the IN2P3 Master project “Modélisation des Astres Compacts” (New-MAC) took place on November 4th to 6th. Originally planned to be organised at LCP Caen, due to the current situation, it finally took place remotely (online).

      The meeting was intended to be mainly devoted to discussions. For each topic, participants briefly summarised the subject they have already presented during MAC webinars and/or introduced ongoing projects to guide the discussion. About 15 participants attended each session. The program is given here below (see also the website of the New-MAC project for presentations and references: https://indico.in2p3.fr/event/21849/).

      Four main points were identified as possible subjects for further discussions and possible collaborations among the participants:

       

      • Low density regime:
        • Use of calibrated functionals vs meta-model, treatment of pairing
      • Finite temperature equation of state (EoS): 
        • EoS in beta equilibrium vs general purpose EoS; 
        • Addition of free proton gas and excited states in current EoS models for (proto-)neutron stars,
        • treatment of cluster distributions for general purpose EoS,
        • phase transitions at high density.
      • Electron-capture (EC) rates and core-collapse supernova simulations.
        • Extensive calculations on a (relatively large) pool of nuclei vs parametrization
        • ways to refine current parametrizations of the EC rates.
      • Transport models:
        • better treatment of momentum dependence

       

      Dedicated and more focused (online) meetings will be organised as follow-up of the discussions on these specific topics.

       

      • 09:30
        PNJL model 20m
        Speaker: Hubert Hansen (IPNL)
      • 09:50
        Quarkyonic matter 20m
        Speaker: Jérôme Margueron (CNRS/IN2P3 - IP2I - Lyon)
      • 10:10
        TBA 20m
        Speaker: guy chanfray (IPN Lyon)
      • 10:30
        TBA 20m
        Speaker: Rahul Somasundaram (IP2I Lyon)
      • 10:50
        TBA 20m
        Speaker: Hasim Guven (IPN-Orsay)
      • 11:10
        TBA 20m
        Speaker: Dr Guilherme Grams (ip2i)
      • 11:30
        TBA 20m
        Speaker: Chiranjib Mondal (LPC Caen)