Diffraction is important when nearby substellar objects gravitationally lens distant stars. If the wavelength of the observation is comparable to the Schwarzschild radius of lensing object, diffraction leaves an observable imprint on the lensing signature. The SKA may have sufficient sensitivity to detect the typical sources, giant stars in the bulge. The diffractive signatures in a lensing event break the degeneracies between the mass of the lens, its distance and proper motion.
- Pub Date:
- February 2013
- Astrophysics - Instrumentation and Methods for Astrophysics;
- Astrophysics - Earth and Planetary Astrophysics;
- Astrophysics - Galaxy Astrophysics
- 3 pages, 2 figurs, submission for the Proceedings of the Thirteenth Marcel Grossman Meeting on General Relativity edited by Kjell Rosquist, Robert T Jantzen, Remo Ruffini World Scientific, Singapore, 2013