Massive, massless and ghost modes of gravitational waves from higher-order gravity

被引：96

作者：

Bogdanos, Charalampos ^{[2
]}

Capozziello, Salvatore ^{[1
,3
]}

De Laurentis, Mariafelicia ^{[1
,3
]}

Nesseris, Savvas ^{[4
]}

机构：

[1] Univ Napoli Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy

[2] Univ Paris 11, LPT, F-91405 Orsay, France

[3] Compl Univ Monte S Angelo, INFN Sez Napoli, I-80126 Naples, Italy

[4] Niels Bohr Inst, Niels Bohr Int Acad, DK-2100 Copenhagen O, Denmark

来源：

ASTROPARTICLE PHYSICS | 2010年 / 34卷 / 04期

关键词：

Gravitational waves; Alternative theories of gravity; Cosmology;

D O I：

10.1016/j.astropartphys.2010.08.001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We linearize the field equations for higher order theories that contain scalar invariants other than the Ricci scalar. We find that besides a massless spin-2 field (the standard graviton), the theory contains also spin-0 and spin-2 massive modes. Then, we investigate the possible detectability of such additional polarization modes of a stochastic gravitational wave by ground-based and space interferometric detectors. Finally, we extend the formalism of the cross-correlation analysis, including the additional polarization modes, and calculate the detectable energy density of the spectrum for a stochastic background of the relic gravity waves that corresponds to our model. For the situation considered here, we find that these massive modes are certainly of interest for direct detection by the LISA experiment. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：236 / 244

页数：9

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