Gravitational polarizability of black holes
Gravitational polarizability of black holes
复制标题
黑洞的引力极化率
DOI：
10.1103/physrevd.80.044017
复制
发表时间：
2009
影响因子：
5
通讯作者：
O. Lecian
中科院分区：
文献类型：
--
作者：
T. Damour;O. Lecian
将黑洞的引力极化率特性与其电磁极化率特性进行比较和对比。定义并计算了黑洞的“形状”或“高度”多极洛夫数${h}_{l}$。然后将它们与电磁类似物 ${h}_{l}^{\mathrm{EM}}$ 进行比较。洛夫数 ${h}_{l}$ 给出了由遥远质量在黑洞地平线上升起的第 $l$ 个多极“潮汐隆起”的高度。我们还讨论了测试质量 $m$ 引起的潮汐隆起的形状，在 $m$ 非常接近地平线的限度内。
The gravitational polarizability properties of black holes are compared and contrasted with their electromagnetic polarizability properties. The ``shape'' or ``height'' multipolar Love numbers ${h}_{l}$ of a black hole are defined and computed. They are then compared to their electromagnetic analogs ${h}_{l}^{\mathrm{EM}}$. The Love numbers ${h}_{l}$ give the height of the $l$th multipolar ``tidal bulge'' raised on the horizon of a black hole by faraway masses. We also discuss the shape of the tidal bulge raised by a test-mass $m$, in the limit where $m$ gets very close to the horizon.