Gravitational waves from deflagration bubbles in first-order phase transitions

被引:30
|
作者
Megevand, Ariel [1 ]
机构
[1] Univ Nacl Mar del Plata, Dept Fis, Fac Ciencias Exactas & Nat, RA-7600 Mar Del Plata, Argentina
来源
PHYSICAL REVIEW D | 2008年 / 78卷 / 08期
关键词
D O I
10.1103/PhysRevD.78.084003
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The walls of bubbles in a first-order phase transition can propagate either as detonations, with a velocity larger than the speed of sound, or deflagrations, which are subsonic. We calculate the gravitational radiation that is produced by turbulence during a phase transition which develops via deflagration bubbles. We take into account the fact that a deflagration wall is preceded by a shock front which distributes the latent heat throughout space and influences other bubbles. We show that turbulence can induce peak values of Omega(GW) as high as similar to 10(-9). We discuss the possibility of detecting at LISA (Laser Interferometer Space Antennae) gravitational waves produced in the electroweak phase transition with wall velocities v(w)less than or similar to 10(-1), which favor electroweak baryogenesis.
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页数:8
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