Delta baryons in neutron-star matter under strong magnetic fields
2021
In this work, we study magnetic field effects on neutron star matter containing the baryon octet and additional heavier spin 3/2 baryons (the $$\varDelta $$
’s). We make use of two different relativistic hadronic models that contain an additional vector-isovector self interaction for the mesons: one version of a relativistic mean field (RMF) model and the chiral mean field (CMF) model. We find that both the additional interaction and a strong magnetic field enhance the $$\varDelta $$
baryon population in dense matter, while decreasing the relative density of hyperons. At the same time that the vector-isovector meson interaction modifies neutron-star masses very little (
$$<0.1~\mathrm M_{\mathrm{Sun}}$$
), it decreases their radii considerably, allowing both models to be in better agreement with observations. Together, these features indicate that magnetic neutron stars are likely to contain $$\varDelta $$
baryons in their interior.
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
61
References
4
Citations
NaN
KQI