Observer-dependent tidal indicators in the Kerr spacetime

被引：4

作者：

Bini, Donato ^{[1
,2
,3
]}

Geralico, Andrea ^{[2
,4
]}

机构：

[1] CNR, Ist Applicaz Calcolo M Picone, I-00185 Rome, Italy

[2] Univ Roma La Sapienza, ICRA, I-00185 Rome, Italy

[3] INFN, Sez Firenze, I-00185 Rome, Italy

[4] Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy

来源：

CLASSICAL AND QUANTUM GRAVITY | 2012年 / 29卷 / 05期

关键词：

GENERAL-RELATIVITY; EXTENDED BODIES; CENTRIFUGAL FORCES; CIRCULAR ORBITS; NEUTRON-STARS; BLACK-HOLE; DYNAMICS; EQUATIONS; BINARIES;

D O I：

10.1088/0264-9381/29/5/055005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The observer-dependent tidal effects associated with the electric and magnetic parts of the Riemann tensor with respect to an arbitrary family of observers are discussed in a general spacetime in terms of certain 'tidal indicators'. The features of such indicators are then explored by specializing our considerations to the family of stationary circularly rotating observers in the equatorial plane of the Kerr spacetime. There exist a number of observer families which are special for several reasons and for each of them such indicators are evaluated. The transformation laws of tidal indicators when passing from one observer to another are also discussed, clarifying the interplay among them. Our analysis shows that no equatorial plane circularly rotating observer in the Kerr spacetime can ever measure a vanishing tidal electric indicator, whereas the family of Carter's observers measures zero tidal magnetic indicator.

引用

页数：15

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