Adapted instabilities excited in spherical magnetized viscoelastic astroclouds with extreme dust-fugacity moderations

Kalita, Dhrubajit; Karmakar, Pralay Kumar

doi:10.1140/epjp/s13360-021-01479-9

Cited by 6 publications

(6 citation statements)

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“…The various multiparametric symbols appearing in Eq. ( 29) are respectively given as In order for executing a scale-invariant analysis, a standard astronomical normalization scheme 45,47 is adopted to normalize Eq. ( 29) as here ω J = (4π Gρ h0 ) 1 / 2 is the Jeans frequency corresponding to constitutive heavy nuclei.…”

Section: Scientificmentioning

confidence: 99%

“…43) excited in the inner crust region of neutron stars are basically dictated by the multiparametric dispersion windows featuring the interior of neutron stars (described judiciously by Eqs. [44][45][46][47][48][49][50][51][52][53][54][55][56]. ( 42)…”

Section: Scientificmentioning

confidence: 99%

“…All the relevant physical parameters describing the composite fluid are assumed to undergo small-scale linear perturbations relative to their corresponding hydrostatic homogeneous equilibrium values ( ) in the presence of active geometrical curvature modulation effects (via ). Thus, such homology perturbations grow in the harmonic form of spherical spatiotemporal waves given in the generic notations 45 , 47 as where is the angular frequency, is the angular wavenumber of the collective fluctuations and the constitutive species subscript, .…”

Section: Introductionmentioning

confidence: 99%

“…In order for executing a scale-invariant analysis, a standard astronomical normalization scheme 45 , 47 is adopted to normalize Eq. ( 29 ) as here is the Jeans frequency corresponding to constitutive heavy nuclei.…”

Section: Introductionmentioning

confidence: 99%

“…The small-amplitude spherical normal mode analysis yields a linear dispersion relation (Eq. 43), modulated by an atypical set of coefficients (Eqs [44][45][46][47][48][49][50][51][52][53][54][55][56],. multiparametrically dependent on the diversified inner crust features.…”

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confidence: 99%

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A hybrid GNA instability

Karmakar

Kalita

Atteya

2022

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A semi-analytic admixed model formalism to study the stability effects of the inner crust regions against the local collective perturbations in non-rotating neutron stars is proposed. It consists of the viscoelastic heavy neutron-rich nuclei, superfluid neutrons, and degenerate quantum electrons. A normal spherical mode analysis yields a generalized linear dispersion relation multiparametrically mimicking the inner crust features of neutron stars. A hybrid gravito-nucleo-acoustic (GNA) instability mode is found to be excited. It is demonstrated that the electron density and the inner crust curvature act as its accelerating and antidispersive agents. In contrast, the heavy neutron-rich nucleus and neutron densities act as decelerating factors. The heavy nucleus density, electron density, and geometric curvature act as its destabilizers. It is only the neutron density that acts as the GNA stabilizing agent. The heavy neutron-rich nucleus and neutron densities are found to act as dispersive broadening factors to it. The high-$$K$$ K regions are the more unstable spectral windows indicating that the GNA mode plays a dominant role in the inner crust zone towards the local stability. Its fair reliability is indicated in light of the recent astronomic observed scenarios. It could be useful to explore acoustic mode signatures in non-rotating neutron stars and similar other compact astroobjects.

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Section: Scientificmentioning

confidence: 99%