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Title: Stability of mass varying particle lumps

Abstract

The theoretical description of compact structures that share some features with mass varying particles allows for a simple analysis of the equilibrium and stability for massive stellar bodies. We investigate static, spherically symmetric solutions of Einstein equations for a system composed by nonbaryonic matter (neutrinos or dark matter) which forms stable structures through attractive forces mediated by a background scalar field (dark energy). Assuming that the dark matter, or massive neutrinos, consists of a gas of weakly interacting particles, the coupling with the scalar field is translated into an effective dependence of the mass of the compounding particle on the radial coordinate of the curved spacetime. The stability analysis reveals that these static solutions become dynamically unstable for different Buchdahl limits of the ratio between the total mass energy and the stellar radius, M/R. We also find regular solutions that for an external observer resemble Schwarzschild black holes. Our analysis leaves unanswered the question whether such solutions, which are both regular and stable, do exist.

Authors:
;  [1]
  1. Departamento de Fisica, Universidade Federal de Sao Carlos, P.O. Box 676, 13565-905, Sao Carlos, SP (Brazil)
Publication Date:
OSTI Identifier:
21313546
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 80; Journal Issue: 12; Other Information: DOI: 10.1103/PhysRevD.80.123011; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BLACK HOLES; COUPLING; EINSTEIN FIELD EQUATIONS; EQUILIBRIUM; MASS; MATHEMATICAL SOLUTIONS; NEUTRINOS; NONLUMINOUS MATTER; PARTICLES; SCALAR FIELDS; SCHWARZSCHILD METRIC; SIMULATION; SPACE-TIME; STABILITY; SYMMETRY

Citation Formats

Bernardini, A E, Bertolami, O, and Instituto Superior Tecnico, Departamento de Fisica, Av. Rovisco Pais, 1, 1049-001, Lisboa. Stability of mass varying particle lumps. United States: N. p., 2009. Web. doi:10.1103/PHYSREVD.80.123011.
Bernardini, A E, Bertolami, O, & Instituto Superior Tecnico, Departamento de Fisica, Av. Rovisco Pais, 1, 1049-001, Lisboa. Stability of mass varying particle lumps. United States. https://doi.org/10.1103/PHYSREVD.80.123011
Bernardini, A E, Bertolami, O, and Instituto Superior Tecnico, Departamento de Fisica, Av. Rovisco Pais, 1, 1049-001, Lisboa. 2009. "Stability of mass varying particle lumps". United States. https://doi.org/10.1103/PHYSREVD.80.123011.
@article{osti_21313546,
title = {Stability of mass varying particle lumps},
author = {Bernardini, A E and Bertolami, O and Instituto Superior Tecnico, Departamento de Fisica, Av. Rovisco Pais, 1, 1049-001, Lisboa},
abstractNote = {The theoretical description of compact structures that share some features with mass varying particles allows for a simple analysis of the equilibrium and stability for massive stellar bodies. We investigate static, spherically symmetric solutions of Einstein equations for a system composed by nonbaryonic matter (neutrinos or dark matter) which forms stable structures through attractive forces mediated by a background scalar field (dark energy). Assuming that the dark matter, or massive neutrinos, consists of a gas of weakly interacting particles, the coupling with the scalar field is translated into an effective dependence of the mass of the compounding particle on the radial coordinate of the curved spacetime. The stability analysis reveals that these static solutions become dynamically unstable for different Buchdahl limits of the ratio between the total mass energy and the stellar radius, M/R. We also find regular solutions that for an external observer resemble Schwarzschild black holes. Our analysis leaves unanswered the question whether such solutions, which are both regular and stable, do exist.},
doi = {10.1103/PHYSREVD.80.123011},
url = {https://www.osti.gov/biblio/21313546}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 12,
volume = 80,
place = {United States},
year = {Tue Dec 15 00:00:00 EST 2009},
month = {Tue Dec 15 00:00:00 EST 2009}
}