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Title: Chameleon stars

Abstract

We consider a gravitating spherically symmetric configuration consisting of a scalar field nonminimally coupled to ordinary matter in the form of a perfect fluid. For this system we find static, regular, asymptotically flat solutions for both relativistic and nonrelativistic cases. It is shown that the presence of the nonminimal interaction leads to substantial changes both in the radial matter distribution of the star and in the star's total mass. A simple stability test indicates that, for the choice of parameters used in the paper, the solutions are unstable.

Authors:
 [1];  [2];  [3];  [1];  [4]
  1. Institute for Basic Research, Eurasian National University, Astana, 010008 (Kazakhstan)
  2. (Kyrgyzstan)
  3. Institute of Physicotechnical Problems and Material Science of the NAS of the Kyrgyz Republic, 265 a, Chui Street, Bishkek, 720071 (Kyrgyzstan)
  4. (United States)
Publication Date:
OSTI Identifier:
21607909
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 84; Journal Issue: 8; Other Information: DOI: 10.1103/PhysRevD.84.084025; (c) 2011 American Institute of Physics; 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; CONFIGURATION; DISTRIBUTION; INTERACTIONS; MASS; MATHEMATICAL SOLUTIONS; MATTER; RELATIVISTIC RANGE; SCALAR FIELDS; SIMULATION; STABILITY; STARS; SYMMETRY; ENERGY RANGE

Citation Formats

Dzhunushaliev, Vladimir, Institute of Physicotechnical Problems and Material Science of the NAS of the Kyrgyz Republic, 265 a, Chui Street, Bishkek, 720071, Folomeev, Vladimir, Singleton, Douglas, and Physics Department, CSU Fresno, Fresno, California 93740-8031. Chameleon stars. United States: N. p., 2011. Web. doi:10.1103/PHYSREVD.84.084025.
Dzhunushaliev, Vladimir, Institute of Physicotechnical Problems and Material Science of the NAS of the Kyrgyz Republic, 265 a, Chui Street, Bishkek, 720071, Folomeev, Vladimir, Singleton, Douglas, & Physics Department, CSU Fresno, Fresno, California 93740-8031. Chameleon stars. United States. doi:10.1103/PHYSREVD.84.084025.
Dzhunushaliev, Vladimir, Institute of Physicotechnical Problems and Material Science of the NAS of the Kyrgyz Republic, 265 a, Chui Street, Bishkek, 720071, Folomeev, Vladimir, Singleton, Douglas, and Physics Department, CSU Fresno, Fresno, California 93740-8031. Sat . "Chameleon stars". United States. doi:10.1103/PHYSREVD.84.084025.
@article{osti_21607909,
title = {Chameleon stars},
author = {Dzhunushaliev, Vladimir and Institute of Physicotechnical Problems and Material Science of the NAS of the Kyrgyz Republic, 265 a, Chui Street, Bishkek, 720071 and Folomeev, Vladimir and Singleton, Douglas and Physics Department, CSU Fresno, Fresno, California 93740-8031},
abstractNote = {We consider a gravitating spherically symmetric configuration consisting of a scalar field nonminimally coupled to ordinary matter in the form of a perfect fluid. For this system we find static, regular, asymptotically flat solutions for both relativistic and nonrelativistic cases. It is shown that the presence of the nonminimal interaction leads to substantial changes both in the radial matter distribution of the star and in the star's total mass. A simple stability test indicates that, for the choice of parameters used in the paper, the solutions are unstable.},
doi = {10.1103/PHYSREVD.84.084025},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 8,
volume = 84,
place = {United States},
year = {2011},
month = {10}
}