Black Hole Beacon: Gravitational Lensing
A. A. Jackson (2015), JBIS, 68, pp.342-346Refcode
: Black holes, interstellar communicationsAbstract:
This paper describes a beacon that uses laser transmitters and a non-rotating black hole as a beacon deployed by an advanced civilization. The idea that advanced civilizations may seek a way to communicate in optimum ways (Benford and Benford, 2010 ) has been put forward in recent times. In what manner could a civilization use a gravitational lens to augment laser transmitters used as a beacon? It is shown that an infrared laser transmitter of one Watt can reach a range of at least one kilo parsec when there is a caustic crossing on the optical axis. This is the problem considered here.
PDF file, 5 pages: £5.00