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
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