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arXiv 0710.4102math.AP
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Schwarzschild流形上Maxwell场的衰减

Decay of the Maxwell field on the Schwarzschild manifold

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摘要:

研究了Schwarzschild黑洞外部区域中解耦的Maxwell方程组的解。在静止区域,史瓦西坐标$r$的范围超过$2M < r_1 < r < r_2$,我们得到的衰减率$t^{-1}$的麦克斯韦场的所有组件。我们使用向量场方法,不需要球谐分解。在传出区域,其中的Regge-Wheeler龟坐标是大的,$r_*>εt$,我们得到的零组件的$|ϕ_+| \sim |α| < C r^{-5/2}$,$|ϕ_0| \sim |ρ| + |σ| < C r^{-2} |t-r_*|^{-1/2}$,和$|ϕ_{-1}| \sim |\underlineα| < C r^{-1} |t-r_*|^{-1}$的速度衰减。沿着事件视界和进入区域,当$r_*<0$和$t+r_*1$时,所有分量(相对于进入零基归一化)以$C \uout^{-1}$的速率衰减,$\uout=t+r_*$在外部区域。

英文摘要:

We study solutions of the decoupled Maxwell equations in the exterior region of a Schwarzschild black hole. In stationary regions, where the Schwarzschild coordinate $r$ ranges over $2M < r_1 < r < r_2$, we obtain a decay rate of $t^{-1}$ for all components of the Maxwell field. We use vector field methods and do not require a spherical harmonic decomposition. In outgoing regions, where the Regge-Wheeler tortoise coordinate is large, $r_*>εt$, we obtain decay for the null components with rates of $|ϕ_+| \sim |α| < C r^{-5/2}$, $|ϕ_0| \sim |ρ| + |σ| < C r^{-2} |t-r_*|^{-1/2}$, and $|ϕ_{-1}| \sim |\underlineα| < C r^{-1} |t-r_*|^{-1}$. Along the event horizon and in ingoing regions, where $r_*<0$, and when $t+r_*1$, all components (normalized with respect to an ingoing null basis) decay at a rate of $C \uout^{-1}$ with $\uout=t+r_*$ in the exterior region.

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