arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1010.4773hep-thastro-ph.COgr-qc
收藏

Lorentz Breaking Massive Gravity中的恒星和(毛茸茸的)黑洞

Stars and (Furry) Black Holes in Lorentz Breaking Massive Gravity

Denis Comelli, Fabrizio Nesti, Luigi Pilo

摘要:

我们使用有效理论方法研究一类洛伦兹破缺大质量引力理论中的精确球对称解,其中引力子质量是通过与一组合适的Stuckelberg场的相互作用产生的。我们明确地找到了精确的黑洞解,它推广了我们熟悉的史瓦西解,史瓦西解显示了一个非解析的头发,其形式为幂项r^γ。对于现实的自引力物体,我们发现了一些有趣的特征,这些特征与高斯定律的有效违反有关:i)出现在标准1/r项中的总引力质量得到了与物体本身面积成比例的乘法重整化; ii)类似幂的毛修正的大小也与物体的大小有关。这些新的特征可以归因于体内物质开启的金石流体的存在;它的状态方程接近中心附近的暗能量。戈德斯通流体也改变了物质的平衡压力,导致引力子质量的上限为m <~ 10^-28 - 10 ^29 eV,这是由宇宙中最大的稳定引力束缚态推导出来的。

英文摘要:

We study the exact spherically symmetric solutions in a class of Lorentz-breaking massive gravity theories, using the effective-theory approach where the graviton mass is generated by the interaction with a suitable set of Stuckelberg fields. We find explicitly the exact black hole solutions which generalizes the familiar Schwarzschild one, which shows a non-analytic hair in the form of a power-like term r^γ. For realistic self-gravitating bodies, we find interesting features, linked to the effective violation of the Gauss law: i) the total gravitational mass appearing in the standard 1/r term gets a multiplicative renormalization proportional to the area of the body itself; ii) the magnitude of the power-like hairy correction is also linked to size of the body. The novel features can be ascribed to presence of the goldstones fluid turned on by matter inside the body; its equation of state approaching that of dark energy near the center. The goldstones fluid also changes the matter equilibrium pressure, leading to an upper limit for the graviton mass, m <~ 10^-28 - 10^29 eV, derived from the largest stable gravitational bound states in the Universe.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑