SETI & Technosignatures

A Proposal For Enhancing Technosignature Search Toward The Galactic Center

By Keith Cowing
Status Report
April 2, 2024
Filed under , , , ,
A Proposal For Enhancing Technosignature Search Toward The Galactic Center
n celebration of the International Year of Astronomy 2009, NASA’s Great Observatories — the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory — have produced a matched trio of images of the central region of our Milky Way galaxy.

We discuss the possibility of enhancing intelligent life searches toward the Galactic center. From the clockwork orbital motions of stars around the Sgr A∗ black hole, we can determine the distance to the Galactic center at an exceptional accuracy, despite its remoteness ∼8.3kpc.

In addition, we can define precise reference epochs by selecting a prominent object such as the bright B-type star S2. These properties have a particular affinity for the coordinated signaling scheme which was hypothesized by Seto (2019) for systematically connecting intentional senders to searchers without a prior communication.

If S2 is actually being used as a common reference clock, we can compress the search directions around the Galactic center by more than two orders of magnitude, with the scanning interval of ∼16yr.

Naoki Seto

Comments: 7 pages, 6 figures, accepted for publication in ApJ
Subjects: Instrumentation and Methods for Astrophysics (astro-ph.IM); Astrophysics of Galaxies (astro-ph.GA); Popular Physics (physics.pop-ph)
Cite as: arXiv:2404.00840 [astro-ph.IM] (or arXiv:2404.00840v1 [astro-ph.IM] for this version)
Submission history
From: Naoki Seto
[v1] Mon, 1 Apr 2024 00:38:52 UTC (181 KB)
Astrobiology, SETI,

Explorers Club Fellow, ex-NASA Space Station Payload manager/space biologist, Away Teams, Journalist, Lapsed climber, Synaesthete, Na’Vi-Jedi-Freman-Buddhist-mix, ASL, Devon Island and Everest Base Camp veteran, (he/him) 🖖🏻