V.L. Kauts1

1 Bauman Moscow State Technical University (Moscow, Russia)
1 vkauts@mail.ru

The problem of establishing contact with extraterrestrial civilizations involves determining the optimal frequency range of the received signal, taking into account in particular signal absorption during propagation and absence of natural radiation sources at the wavelength considered.

Purpose – analysis of the line corresponding to the ultrafine structure of the ground state of positronium considered as a source of potentially artificial origin.

It is shown that a line of ultrafine positronium structure of cosmic origin being recorded by modern facilities presupposes a technogenic nature of the signal.

Conducting extraterrestrial civilization search programs at the frequency of ultrafine splitting of the ground state of positronium.

Kauts V.L. Positronium hyperfine structure line as a means of communication with extraterrestrial civilizations. Nonlinear World. 2024. V. 22. № 3. P. 30–34. DOI: https://doi.org/10.18127/ j20700970-202403-04 (In Russian)

1. Guessoum N., Ramaty R., Lingenfelter R.E. Positron annihilation in the interstellar medium Astrophys. J. 1991. V. 378. P.170.
2. Burdyuzha V.V., Kauts V.L. Recombinational lines of Ps (positronium) as tracer of annihilation process. Astrophys. J. Suppl. Ser. 1994. V. 92. P. 549.
3. Burdyuzha V., Kauts V., Wallyn P. Characteristic lines of positronium from sources of annihilation line Astron. Astrophys. Suppl. Ser. 1996. V. 120. P. 365.
4. Burdyuzha V.V., Kauts V.L. Positronium in space: proposal for detection Astrophysics and Space Science. 1998. V. 258. P. 329.
5. Burdyuzha V.V., Durouchoux Ph., Kauts V.L. Possibility of Detecting the Hyperfine Ground State Transition of Positronium Astronomy Letters. 1999. V. 25. № 3. P. 136.
6. Kardashev N.S. Optimal wavelength region for communication with extraterrestrial intelligence: 1.5 mm Nature. 1979. V. 278. P. 28.
7. Kardashev N.S. O vozmozhnosti obnaruzheniya razreshennyh linij atomarnogo vodoroda v radiodiapazone. Astronomicheskij Zhurnal. 1959. T. 36. S. 838 (In Russian).
8. Sorochenko R.L. Possibilities of investigation of interstellar matter by radio recombination lines (Review). Astron. Nachr. 1989. V. 310. P. 389.