Gravitational waves in Brans-Dicke theory with a cosmological constant

被引:7
作者
Ozer, Hatice [1 ]
Delice, Ozgur [2 ]
机构
[1] Istanbul Univ, Fac Sci, Dept Phys, TR-34134 Istanbul, Turkey
[2] Marmara Univ, Fac Arts & Sci, Dept Phys, TR-34722 Istanbul, Turkey
来源
EUROPEAN PHYSICAL JOURNAL C | 2021年 / 81卷 / 04期
关键词
MODIFIED GRAVITY; RELATIVISTIC THEORY; MACHS PRINCIPLE; HIGH-FREQUENCY; FIELD; RENORMALIZATION; UNIVERSES; RADIATION; LIMIT;
D O I
10.1140/epjc/s10052-021-09123-7
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
Weak field gravitational wave solutions are investigated in Brans-Dicke (BD) theory in the presence of a cosmological constant. In this setting the background geometry is not flat but asymptotically de-Sitter. We investigate the linearised field equations, and their gravitational wave solutions in a certain gauge choice. We will show that this theory leads to massless scalar waves as in original BD theory and in contrast to massive BD theory. The effects of these waves on free particles and their polarization properties are studied extensively and effects of the cosmological constant is analyzed in these phenomena in detail. The energy flux of these waves are also discussed in this background. By analyzing this flux, we obtain a critical distance where the waves cannot propagate further, which extends Cosmic no Hair Conjecture (CNC) to BD theory with a cosmological constant.
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页数:14
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