Exploring the limits of nucleonic metamodelling using different relativistic density functionals
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866915141617975296 |
|---|---|
| author | Char, Prasanta Mondal, Chiranjib |
| author_facet | Char, Prasanta Mondal, Chiranjib |
| contents | In this work, we explore two classes of density dependent relativistic mean-field models, their predictions of proton fractions at high densities and neutron star structure. We have used a metamodelling approach to these relativistic density functionals. We have generated a large ensemble of models with these classes and then applied constraints from theoretical and experimental nuclear physics and astrophysical observations. We find that both models produce similar equations of state and neutron star mass-radius sequences. But, their underlying compositions, denoted by the proton fraction in this case, are vastly different. This reinstates previous findings that information on composition gets masqueraded in $β$-equilibrium. Additional observations of non-equilibrium phenomena are necessary to pin it down. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_04211 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Exploring the limits of nucleonic metamodelling using different relativistic density functionals Char, Prasanta Mondal, Chiranjib Nuclear Theory High Energy Astrophysical Phenomena In this work, we explore two classes of density dependent relativistic mean-field models, their predictions of proton fractions at high densities and neutron star structure. We have used a metamodelling approach to these relativistic density functionals. We have generated a large ensemble of models with these classes and then applied constraints from theoretical and experimental nuclear physics and astrophysical observations. We find that both models produce similar equations of state and neutron star mass-radius sequences. But, their underlying compositions, denoted by the proton fraction in this case, are vastly different. This reinstates previous findings that information on composition gets masqueraded in $β$-equilibrium. Additional observations of non-equilibrium phenomena are necessary to pin it down. |
| title | Exploring the limits of nucleonic metamodelling using different relativistic density functionals |
| topic | Nuclear Theory High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2502.04211 |