arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2408.01252gr-qcmath-phmath.MP
收藏

稳态黑洞事件视界的正则性与温度

Regularity and temperature of stationary black hole event horizons

R. A. Hounnonkpe, E. Minguzzi

AI总结:

针对稳态黑洞事件视界正则性证明中对截面存在的假设,本文利用商丛方法直接证明其在零能量条件下为全测地零超曲面,并在主能量条件下证明其具有常数表面引力,从而确立了黑洞热力学第零定律。

摘要:

现有关于稳态黑洞事件视界正则性的证明依赖于对截面存在的某些假设,这些假设蕴含了 $C^1$ 可微性假设。通过使用商丛方法,我们直接证明了在零能量条件下,稳态黑洞的事件视界确实是与度量同等正则的全测地零超曲面,从而弥补了这一问题。随后,利用这一结果,我们证明了先前工作中假设其存在的截面确实存在。这些结果在弱因果条件下成立。接着,我们证明在主能量条件下,稳态黑洞事件视界确实具有常数表面引力,这一结果不需要任何非退化假设、对截面存在的要求或先验光滑性条件。我们能够将角速度和表面引力的值(不仅是符号)理解为与视界相关的量,而无需假设爱因斯坦真空方程和 Killing 延拓。在物理上,这意味着在非常一般的条件下,每个稳态黑洞确实具有恒定的温度(即黑洞热力学第零定律)。

英文摘要:

Available proofs of the regularity of stationary black hole event horizons rely on certain assumptions on the existence of sections that imply a $C^1$ differentiability assumption. By using a quotient bundle approach, we remedy this problem by proving directly that, indeed, under the null energy condition event horizons of stationary black holes are totally geodesic null hypersurfaces as regular as the metric. Only later, by using this result, we show that the cross-sections, whose existence was postulated in previous works, indeed exist.These results hold true under weak causality conditions. Subsequently, we prove that under the dominant energy condition stationary black hole event horizons indeed admit constant surface gravity, a result that does not require any non-degeneracy assumption, requirements on existence of cross-sections or a priori smoothness conditions. We are able to make sense of the angular velocity and of the value (not just sign) of surface gravity as quantities related to the horizon, without the need of assuming Einstein's vacuum equations and the Killing extension. Physically, this implies that under very general conditions every stationary black hole has indeed a constant temperature (the zeroth law of black hole thermodynamics).

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。

↑