Abstract
In two recent papers [1, 2] the author proved that radio communications between any pair of stars within our Galaxy are feasible with modest transmitted powers if the gravitational lenses of both stars are exploited. In this chapter we extend those innovative results to the case of radio communications between nearby galaxies. We show that radio communications between galaxies may become feasible if supermassive black holes, usually located at the center of galaxies, are exploited as gravitational lenses. In other words, a massive black hole may be regarded as a huge focusing device for radio waves being transmitted out of that galaxy and/or being received from another galaxy.
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REFERENCES
C. Maccone, “Interstellar radio links enhanced by exploiting the Sun as a gravitational lens,” Acta Astronautica, 68 (2011), 76–84.
C. Maccone, “Interstellar radio links enhanced by exploiting the Sun as a gravitational lens,” paper #IAC-09.D4.1.8 presented at the 60th International Astronautical Congress, Daejeon, Republic of Korea, October 12–16, 2009, and distributed to all participants as a CD-ROM file, but not published in printed form.
C. Maccone, Deep Space Flight and Communications: Exploiting the Sun as a Gravitational Lens, Springer/Praxis, Heidelberg, Germany/Chichester, U.K. A 400-page treatise about the FOCAL space mission that embodies and updates all previously published material about FOCAL.
C. Maccone, “SETI among galaxies by virtue of black holes,” Acta Astronautica, 2012, in press.
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© 2012 Springer-Verlag Berlin Heidelberg
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Maccone, C. (2012). Extragalactic Internet by black hole gravitational lensing. In: Mathematical SETI. Springer Praxis Books(). Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27437-4_16
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DOI: https://doi.org/10.1007/978-3-642-27437-4_16
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