Phantom energy mediates a long-range repulsive force

被引:56
作者
Amendola, L [1 ]
机构
[1] Osserv Astron Roma, INAF, I-00040 Rome, Italy
关键词
D O I
10.1103/PhysRevLett.93.181102
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Scalar field models with nonstandard kinetic terms have been proposed in the context of k inflation, of Born-Infeld Lagrangians, of phantom energy and, more in general, of low-energy string theory. In general, scalar fields are expected to couple to matter inducing a new interaction. In this Letter I derive the cosmological perturbation equations and the Yukawa correction to gravity for such general models. I find three interesting results: first, when the field behaves as phantom energy (equation of state less than -1), then the coupling strength is negative, inducing a long-range repulsive force; second, the dark-energy field might cluster on astrophysical scales; third, applying the formalism to a Brans-Dicke theory with a general kinetic term it is shown that its Newtonian effects depend on a single parameter that generalizes the Brans-Dicke constant.
引用
收藏
页码:181102 / 1
页数:4
相关论文
共 46 条
[31]   Spherical scalar field halo in galaxies -: art. no. 061301 [J].
Matos, T ;
Guzmán, FS ;
Núñez, D .
PHYSICAL REVIEW D, 2000, 62 (06)
[32]   Accelerated expansion of the universe driven by tachyonic matter [J].
Padmanabhan, T .
PHYSICAL REVIEW D, 2002, 66 (02)
[33]   Measurements of Ω and Λ from 42 high-redshift supernovae [J].
Perlmutter, S ;
Aldering, G ;
Goldhaber, G ;
Knop, RA ;
Nugent, P ;
Castro, PG ;
Deustua, S ;
Fabbro, S ;
Goobar, A ;
Groom, DE ;
Hook, IM ;
Kim, AG ;
Kim, MY ;
Lee, JC ;
Nunes, NJ ;
Pain, R ;
Pennypacker, CR ;
Quimby, R ;
Lidman, C ;
Ellis, RS ;
Irwin, M ;
McMahon, RG ;
Ruiz-Lapuente, P ;
Walton, N ;
Schaefer, B ;
Boyle, BJ ;
Filippenko, AV ;
Matheson, T ;
Fruchter, AS ;
Panagia, N ;
Newberg, HJM ;
Couch, WJ .
ASTROPHYSICAL JOURNAL, 1999, 517 (02) :565-586
[34]   Extended quintessence [J].
Perrotta, F ;
Baccigalupi, C ;
Matarrese, S .
PHYSICAL REVIEW D, 2000, 61 (02)
[35]   Dilatonic ghost condensate as dark energy [J].
Piazza, F ;
Tsujikawa, S .
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2004, (07) :47-71
[36]   Model for gravitational interaction between dark matter and baryons [J].
Piazza, F ;
Marinoni, C .
PHYSICAL REVIEW LETTERS, 2003, 91 (14)
[37]   Type Ia supernova discoveries at z > 1 from the Hubble Space Telescope:: Evidence for past deceleration and constraints on dark energy evolution [J].
Riess, AG ;
Strolger, LG ;
Tonry, J ;
Casertano, S ;
Ferguson, HC ;
Mobasher, B ;
Challis, P ;
Filippenko, AV ;
Jha, S ;
Li, WD ;
Chornock, R ;
Kirshner, RP ;
Leibundgut, B ;
Dickinson, M ;
Livio, M ;
Giavalisco, M ;
Steidel, CC ;
Benítez, T ;
Tsvetanov, Z .
ASTROPHYSICAL JOURNAL, 2004, 607 (02) :665-687
[38]   OSCILLATING SOLITON STARS [J].
SEIDEL, E ;
SUEN, WM .
PHYSICAL REVIEW LETTERS, 1991, 66 (13) :1659-1662
[39]   Rolling tachyon [J].
Sen, A .
JOURNAL OF HIGH ENERGY PHYSICS, 2002, (04) :1162-1180
[40]   Fat gravitons, the cosmological constant and submillimeter tests [J].
Sundrum, R .
PHYSICAL REVIEW D, 2004, 69 (04)