Multibeam SETI Observations Toward Nearby M Dwarfs With FAST
The search for extraterrestrial intelligence (SETI) targeted searches aim to observe specific areas and objects to find possible technosignatures. Many SETI researches have focused on nearby stars and their planets in recent years.
In this paper, we report a targeted SETI observations using the most sensitive L-band Five-hundred-meter Aperture Spherical radio Telescope (FAST) toward three nearby M dwarfs, all of which have been discovered exoplanet candidates. The minimum equivalent isotropic radiant power of the lower limit from the three sources we can detect is 6.19×108 W, which is well within the reach of current human technology.
Applying the multibeam coincidence matching (MBCM) blind search mode, we search for narrowband drifting signals across 1.05-1.45 GHz in each of the two orthogonal linear polarization directions.
An unusual signal at 1312.50 MHz detected from the observation toward AD Leo originally piqued our interest. However, we finally eliminate the possibility of an extraterrestrial origin based on much evidence, such as the polarization, frequency, and beam coverage characteristics.
Xiao-Hang Luan, Bo-Lun Huang, Zhen-Zhao Tao, Yan Cui, Tong-Jie Zhang, Pei Wang
Comments: 13 pages, 2 tables, 8 figures, accepted for publication in AJ
Subjects: Instrumentation and Methods for Astrophysics (astro-ph.IM); Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:2502.20419 [astro-ph.IM] (or arXiv:2502.20419v1 [astro-ph.IM] for this version)
https://doi.org/10.48550/arXiv.2502.20419
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Submission history
From: Xiao-Hang Luan
[v1] Thu, 27 Feb 2025 03:49:29 UTC (11,633 KB)
https://arxiv.org/abs/2502.20419
Astrobiology, SETI,
