Gravitational bending of light by planetary multipoles and its measurement with microarcsecond astronomical interferometers
Abstract
General relativistic deflection of light by mass, dipole, and quadrupole moments of gravitational field of a moving massive planet in the Solar system is derived in the approximation of the linearized Einstein equations. All terms of the order of 1 μas and larger are taken into account, parameterized, and classified in accordance with their physical origin. We discuss the observational capabilities of the near-future optical and radio interferometers for detecting the Doppler modulation of the radial deflection, and the dipolar and quadrupolar light-ray bending by Jupiter and Saturn.
- Publication:
-
A Giant Step: from Milli- to Micro-arcsecond Astrometry
- Pub Date:
- July 2008
- DOI:
- Bibcode:
- 2008IAUS..248..391K
- Keywords:
-
- gravitation;
- gravitational lensing;
- astrometry;
- reference systems;
- planets and satellites: individual (Jupiter);
- Saturn;
- techniques: interferometric