Crustal moment of inertia of glitching pulsars with the KDE0v1 Skyrme interaction

Madhuri, K.; Basu, Debabrata; Routray, T. R.; Pattnaik, Subhaswaraj

doi:10.1140/epja/i2017-12338-x

Cited by 8 publications

(7 citation statements)

References 54 publications

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“…Moreover, only the KDE0v1 Skyrme interaction can also provide quite good description of a significant amount of data from finite nuclei as well [29]. This interaction addresses all the constraints described by Dutra et al [26] and produces good results for mass-radius relation in Vela pulsar [28]. Present calculations reveal that the KDE0v1 Skyrme interaction also provides reasonably good description of proton radioactivity.…”

Section: Discussionsupporting

confidence: 51%

“…But NRAPR parameter set does not satisfy all the other constraints of nuclear matter. Using the KDE0v1 parameter set the maximum mass has been obtained corresponding to the central density 7.7 times the saturation density [28] and the KDE0v1 set tackles all the constraints as described in ref [26] and can explain NS structure. Moreover, only the KDE0v1 force can also fit a significant amount of data from finite nuclei quite well [29].…”

Section: Theoretical Formalismmentioning

confidence: 99%

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Half lives of proton emitters with KDE0v1 Skyrme interaction

Madhuri,

Basu,

Routray

et al. 2018

Preprint

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The half-lives of proton radioactivity of proton emitters are investigated theoretically by using KDE0v1 Skyrme interaction. The total barrier potential in the proton radioactive nuclei is calculated as the sum of the nuclear, Coulomb and centrifugal contributions. The Hartree-Fock nuclear density distributions is used in calculating the nuclear as well as the Coulomb interaction potentials. The quantum mechanical tunneling probability is calculated within the WKB approximation. These calculations provide reasonable estimates for the observed proton radioactivity lifetimes.

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Section: Discussionsupporting

confidence: 51%

Section: Theoretical Formalismmentioning

confidence: 99%

Half lives of proton emitters with KDE0v1 Skyrme interaction

Madhuri,

Basu,

Routray

et al. 2018

Preprint

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“…With the aim of obtaining such a quantity still not using an specific EoS for the neutron star crust, or neither constructing unified EoS's for the entire description of the compact object, we use the approximation for ∆I/I given in Refs. [40,41,52,64,74] and written as…”

Section: Selected Parametrizationsmentioning

confidence: 99%

“…By conservation of angular momentum, the star increases its rotation and the glitch is then established. Some theoretical studies show that pulsar glitches are related to the crustal fraction of the moment of inertia, ∆I/I (I is the total moment of inertia of the star) [51,52,53]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Neutron star crustal properties from relativistic mean-field models and bulk parameters effects

Dutra,

Lenzi,

de Paula

et al. 2021

Preprint

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We calculate crustal properties of neutron stars, namely, mass (Mcrust), radius (Rcrust) and fraction of moment of inertia (∆I/I) from parametrizations of hadronic relativistic mean-field (RMF) model consistent with symmetric and asymmetric nuclear matter constraints, as well as some stellar boundaries. We verify which one are also in agreement with restrictions of ∆I/I 1.4% and ∆I/I 7% related to the glitching mechanism observed in pulsars, such as the Vela one. The latter constraint explains the glitches phenomenon when entrainment effects are taken into account. Our findings indicate that these parametrizations pass in the glitching limit for a neutron star mass range of M 1.82M⊙ (∆I/I 1.4%), and M1.16M⊙ (∆I/I 7%). We also investigate the influence of nuclear matter bulk parameters on crustal properties and find that symmetry energy is the quantity that produces the higher variations on Mcrust, Rcrust, and ∆I/I. Based on the results, we construct a particular RMF parametrization able to satisfy ∆I/I 7% even at M = 1.4M⊙, the mass value used to fit data from the softer component of the Vela pulsar X-ray spectrum. The model also presents compatibility with observational data from PSR J1614-2230, PSR J0348+0432, and MSP J0740+6620 pulsars, as well as, with data from the Neutron Star Interior Composition Explorer (NICER) mission.

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“…The bottom layer of the inner crust consists mostly of exotic nuclear structures collectively known as nuclear pasta [35,36]. The transition density offers important insights into the origin of pulsar glitches from its relation to the crustal fraction of the moment of inertia of a neutron star [37] with additional information on the gravitational wave radiation [38] by the neutron star when subjected to a very intense gravitational field.…”

Section: Introductionmentioning

confidence: 99%

Constraining nuclear matter parameters from correlation systematics: a mean-field perspective

Agrawal

Malik

et al. 2021

Eur. Phys. J. Spec. Top.

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The nuclear matter parameters define the nuclear equation of state (EoS), they appear as coefficients of expansion around the saturation density of symmetric and asymmetric nuclear matter. We review their correlations with several properties of finite nuclei and of neutron stars within mean-field frameworks. The lower order nuclear matter parameters such as the binding energy per nucleon, incompressibility and the symmetry energy coefficients are found to be constrained in narrow limits through their strong ties with selective properties of finite nuclei. From the correlations of nuclear matter parameters with neutron star observables, we further review how precision knowledge of the radii and tidal deformability of neutron stars in the mass range 1−2M may help cast them in narrower bounds. The higher order parameters such as the density slope and the curvature of the symmetry energy or the skewness of the symmetric nuclear matter EoS are, however, plagued with larger uncertainty. From inter-correlation of these higher order nuclear matter parameters with lower order ones, we explore how they can be brought to more harmonious bounds.

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Crustal moment of inertia of glitching pulsars with the KDE0v1 Skyrme interaction

Cited by 8 publications

References 54 publications

Half lives of proton emitters with KDE0v1 Skyrme interaction

Half lives of proton emitters with KDE0v1 Skyrme interaction

Neutron star crustal properties from relativistic mean-field models and bulk parameters effects

Constraining nuclear matter parameters from correlation systematics: a mean-field perspective

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