Possibility of a Coordinated Signaling Scheme in the Galaxy and SETI Experiments
Abstract
We discuss a Galaxy-wide coordinated signaling scheme with which a SETI observer needs to examine a tiny fraction of the sky. The target sky direction is determined as a function of time, based on high-precision measurements of a progenitor of a conspicuous astronomical event such as a coalescence of a double neutron star binary. In various respects, such a coordinated scheme would be advantageous for both transmitters and receivers, and might be widely prevailing as a tacit adjustment. For this scheme, the planned space gravitational-wave detector LISA and its follow-on missions have the potential to narrow down the target sky area by a factor of 103-4, and could have a large impact on future SETI experiments.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- April 2019
- DOI:
- 10.3847/2041-8213/ab133a
- arXiv:
- arXiv:1904.00536
- Bibcode:
- 2019ApJ...875L..10S
- Keywords:
-
- astrobiology;
- extraterrestrial intelligence;
- gravitational waves;
- Astrophysics - Instrumentation and Methods for Astrophysics;
- Physics - Popular Physics
- E-Print:
- 4 pages, 3 figures, accepted for publication in ApJL