Chameleon stars

Journal Article · Sat Oct 15 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.84.084025· OSTI ID:21607909

Dzhunushaliev, Vladimir ^[1]; Folomeev, Vladimir ^[2]; Singleton, Douglas ^[1]

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1. Institute for Basic Research, Eurasian National University, Astana, 010008 (Kazakhstan)
2. Institute of Physicotechnical Problems and Material Science of the NAS of the Kyrgyz Republic, 265 a, Chui Street, Bishkek, 720071 (Kyrgyzstan)

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.

• OSTI ID: 21607909
• Journal Information: Physical Review. D, Particles Fields, Vol. 84, Issue 8; Other Information: DOI: 10.1103/PhysRevD.84.084025; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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