Probing the impact of delta-baryons on nuclear matter and non-radial oscillations in neutron stars

Non-radial oscillations of Neutron Stars (NSs) provide a means to learn important details regarding their interior composition and equation of state. We consider the effects of Δ-baryons on non-radial f -mode oscillations and other NS properties within the Density-Dependent Relativistic Mean Field f...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2024-04, Vol.2024 (4), p.65
Main Authors: Kalita, Probit J., Routaray, Pinku, Ghosh, Sayantan, Kumar, Bharat, Agrawal, B.K.
Format: Article
Language:English
Subjects:
Baryons
Equations of state
Formability
Gravitational waves
gravitational waves / theory
Hyperons
Neutron stars
Nuclear matter
Oscillations
Pulsars
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Summary:Non-radial oscillations of Neutron Stars (NSs) provide a means to learn important details regarding their interior composition and equation of state. We consider the effects of Δ-baryons on non-radial f -mode oscillations and other NS properties within the Density-Dependent Relativistic Mean Field formalism. Calculations are performed for Δ-admixed NS matter with and without hyperons. Our study of the non-radial f -mode oscillations revealed a distinct increase in frequency due to the addition of the Δ-baryons with upto 20% increase in frequency being seen for canonical NSs. Other bulk properties of NSs, including mass, radii, and dimensionless tidal deformability (Λ) were also affected by these additional baryons. Comparing our results with available observational data from pulsars (NICER) and gravitational waves (LIGO-VIRGO collaboration), we found strong agreement, particularly concerning Λ.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2024/04/065