Isospin symmetry breaking effects on the mass-radius relation of a cold, non-accreting neutron star are studied on the basis of two Skyrme Energy Density Functionals (EDFs). One functional contains isospin symmetry breaking terms other than those typically included in Skyrme EDFs while its counterpart is of standard form. Both functionals are based on the same fitting protocol except for the observables and pseudo-observables sensitive to the isospin symmetry breaking channel. The quality of those functionals is similar in the description of terrestrial observables but choosing either of them has a non-negligible effect on the mass-radius relation and tidal deformability of a neutron star. Further investigations are needed to clarify the effects of isospin symmetry breaking on these and other observables of neutron stars that are, and will become, available.

Isospin Symmetry Breaking Effects on the Mass-Radius Relation of a Neutron Star / G. Selva, X. Roca-Maza, G. Colò. - In: SYMMETRY. - ISSN 2073-8994. - 13:1(2021 Jan 16), pp. 144.1-144.11. [10.3390/sym13010144]

Isospin Symmetry Breaking Effects on the Mass-Radius Relation of a Neutron Star

G. Selva
Primo
;
X. Roca-Maza
Secondo
;
G. Colò
Ultimo
2021

Abstract

Isospin symmetry breaking effects on the mass-radius relation of a cold, non-accreting neutron star are studied on the basis of two Skyrme Energy Density Functionals (EDFs). One functional contains isospin symmetry breaking terms other than those typically included in Skyrme EDFs while its counterpart is of standard form. Both functionals are based on the same fitting protocol except for the observables and pseudo-observables sensitive to the isospin symmetry breaking channel. The quality of those functionals is similar in the description of terrestrial observables but choosing either of them has a non-negligible effect on the mass-radius relation and tidal deformability of a neutron star. Further investigations are needed to clarify the effects of isospin symmetry breaking on these and other observables of neutron stars that are, and will become, available.
isospin symmetry breakingneutron star mass-radius relationtidal deformability
Settore FIS/04 - Fisica Nucleare e Subnucleare
European Nuclear Science and Application Research 2
Article (author)
File in questo prodotto:
File Dimensione Formato  
symmetry-13-00144-v2.pdf

accesso aperto

Tipologia: Publisher's version/PDF
Dimensione 357.9 kB
Formato Adobe PDF
357.9 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/870412
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 2
social impact