Stellar structure treatment of quadratic gravity

Citation
Yh. Chen et al., Stellar structure treatment of quadratic gravity, PROG T PHYS, 106(1), 2001, pp. 63-70
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PROGRESS OF THEORETICAL PHYSICS
ISSN journal
0033-068X → ACNP
Volume
106
Issue
1
Year of publication
2001
Pages
63 - 70
Database
ISI
SICI code
0033-068X(200107)106:1<63:SSTOQG>2.0.ZU;2-Z
Abstract
A scheme for considering stellar structure by taking advantage of the quadr atic theory of gravitation in four-dimensions is proposed, citing the fact that the possible deviation of gravity in astrophysical systems from the Ne wtonian inverse square law can be explained through the use of this theory. A modified Lane-Emden equation is derived by making use of the linearized static field equation of quadratic gravity and the polytropic equation of s tate for a fluid. The influence on stellar structure of the additional forc e included in quadratic gravity is investigated. It is shown that the addit ional force can be treated as a perturbation of a bound system by solutions of the modified Lane-Emden equation and an order-of-magnitude analysis.