Light cone structure near null infinity of the Kerr metric

Light cone structure near null infinity of the Kerr metric
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克尔度量接近零无穷大的光锥结构

DOI:
10.1103/physrevd.75.044003
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发表时间:
2007-01
期刊:
影响因子:
5
通讯作者:
Cao, Zhoujian
Cao, Zhoujian
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Lau, Y. K.;Wu, Xiaoning;Gong, Xuefei;Shang, Yu;Bai, Shan;Cao, Zhoujian

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为了理解由引力波携带的相对论性旋转源的角动量问题,在克尔度规的未来零无穷附近的渐近区域,通过对eikonal方程的渐近展开,构造了一组与零无穷相交的无剪切(好)切割的零超曲面。研究了零超曲面的几何性质以及克尔度量在零无穷附近的渐近结构。在角动量的最低阶,得到了克尔度规的邦迪-萨克斯形式。然后进一步发展了纽曼-非提形式化,用它计算克尔度规的纽曼-彭罗斯常数并证明为零。还简要讨论了克尔度规纽曼-彭罗斯常数消失的可能的物理含义。
Motivated by our attempt to understand the question of angular momentum of a relativistic rotating source carried away by gravitational waves, in the asymptotic regime near future null infinity of the Kerr metric, a family of null hypersurfaces intersecting null infinity in shearfree (good) cuts are constructed by means of asymptotic expansion of the eikonal equation. The geometry of the null hypersurfaces as well as the asymptotic structure of the Kerr metric near null infinity are studied. To the lowest order in angular momentum, the Bondi-Sachs form of the Kerr metric is worked out. The Newman-Unti formalism is then further developed, with which the Newman-Penrose constants of the Kerr metric are computed and shown to be zero. Possible physical implications of the vanishing of the Newman-Penrose constants of the Kerr metric are also briefly discussed.
DOI: --
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