Observer-dependent optical properties of stationary axisymmetric spacetimes

被引:1
|
作者
Bini, Donato [1 ,2 ,3 ]
de Felice, Fernando [4 ]
Geralico, Andrea [2 ,5 ]
机构
[1] CNR, Ist Applicaz Calcolo M Picone, I-00185 Rome, Italy
[2] Sapienza Univ Rome, ICRA, I-00185 Rome, Italy
[3] INFN, Sez Firenze, I-00185 Sesto Fiorentino, FI, Italy
[4] Univ Padua, Dept Phys & Astron G Galilei, I-35131 Padua, Italy
[5] Sapienza Univ Rome, Dept Phys, I-00185 Rome, Italy
关键词
Optical path; refraction index; stationary spacetimes; null orbits; GENERAL-RELATIVITY; PRINCIPLE; ENERGY;
D O I
10.1142/S0219887814500248
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The world lines of null particles admit arbitrary parametrizations. In the presence of a family of observers one may introduce along a null world line an extension of the so-called Cattaneo's relative standard time parameter (valid for massive particles) which plays a special role. Another possibility is to use the coordinate time itself as a parameter. The relation between relative standard time and coordinate time allows for the introduction of an observer-dependent optical path and associated refraction index. Both these quantities are studied here working out explicit examples concerning familiar null orbits and observers in black hole spacetimes.
引用
收藏
页数:15
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