Solar System tests and chameleon effect in f(R) gravity


Por: Negrelli, Carolina, Kraiselburd, Lucila, Landau, Susana J., Salgado, Marcelo

Publicada: 4 mar 2020
Categoría: Physics and astronomy (miscellaneous)

Resumen:
Using a novel and self-consistent approach that avoids the scalar-tensor identification in the Einstein frame, we reanalyze the viability of f(R) gravity within the context of solar-system tests. In order to do so, we depart from a simple but fully relativistic system of differential equations that describe a compact object in a static and spherically symmetric spacetime, and then we make suitable linearizations that apply to nonrelativistic objects such as the Sun. We then show clearly under which conditions the emerging chameleonlike mechanism can lead to a post-Newtonian parameter. compatible with the observational bounds. To illustrate this method, we use several specific f(R) models proposed to explain the current acceleration of the Universe, and we show which of them are able to satisfy those bounds.

Filiaciones:
Negrelli, Carolina:
 Univ Nacl La Plata, Grp Astrofis Relatividad & Cosmol, Fac Ciencias Astronom & Geofis, Paseo Bosque S-N, RA-1900 La Plata, Argentina

 Consejo Nacl Invest Cient & Tecn, Godoy Cruz 2290, RA-1425 Buenos Aires, DF, Argentina

Kraiselburd, Lucila:
 Univ Nacl La Plata, Grp Astrofis Relatividad & Cosmol, Fac Ciencias Astronom & Geofis, Paseo Bosque S-N, RA-1900 La Plata, Argentina

 Consejo Nacl Invest Cient & Tecn, Godoy Cruz 2290, RA-1425 Buenos Aires, DF, Argentina

Landau, Susana J.:
 Consejo Nacl Invest Cient & Tecn, Godoy Cruz 2290, RA-1425 Buenos Aires, DF, Argentina

 Univ Buenos Aires, Dept Fis, Fac Ciencias Exactas & Nat, Ciudad Univ Pab 1, RA-1428 Buenos Aires, DF, Argentina

 IFIBA, Ciudad Univ Pab 1, RA-1428 Buenos Aires, DF, Argentina

Salgado, Marcelo:
 Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, DF, Mexico
ISSN: 24700010
Editorial
AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA, Estados Unidos America
Tipo de documento: Article
Volumen: 101 Número: 6
Páginas:
WOS Id: 000517965700007