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Noncomoving description of adiabatic radial perturbations of relativistic stars

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dc.contributor.authorLuz, Paulo
dc.contributor.authorCarloni, Sante
dc.date.accessioned2025-11-11T09:57:21Z
dc.date.available2025-11-11T09:57:21Z
dc.date.issued2024
dc.description.abstractWe study adiabatic, radial perturbations of static, self-gravitating perfect fluids within the theory of general relativity employing a new perturbative formalism. We show that by considering a radially static observer, the description of the perturbations can be greatly simplified with respect to the standard comoving treatment. The new perturbation equations can be solved to derive analytic solutions to the problem for a general class of equilibrium solutions.We discuss the thermodynamic description of the fluid under isotropic frame transformations, showing how, in the radially static, noninertial frame, the stressenergy tensor of the fluid must contain momentum transfer terms. As illustrative examples of the new approach, we study perturbations of equilibrium spacetimes characterized by the Buchdahl I, Heintzmann IIa, Patwardhan-Vaidya IIa, and Tolman VII solutions, computing the first oscillation eigenfrequencies and the associated eigenfunctions. We also analyze the properties of the perturbations of cold neutron stars composed of a perfect fluid verifying the Bethe-Johnson model I equation of state, computing the oscillation eigenfrequencies and the e-folding time.eng
dc.identifier.citationLuz, P., & Carloni, S. (2024). Noncomoving description of adiabatic radial perturbations of relativistic stars. Physical Review D, 110(8), 084055.
dc.identifier.doi10.1103/PhysRevD.110.084055
dc.identifier.urihttp://hdl.handle.net/10400.26/59605
dc.language.isoeng
dc.peerreviewedyes
dc.publisherAPS, Physical Review Journals
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleNoncomoving description of adiabatic radial perturbations of relativistic starseng
dc.typereview article
dspace.entity.typePublication
oaire.citation.issue8
oaire.citation.startPage084054
oaire.citation.titlePhysical Review D
oaire.citation.volume110
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

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