- Status Report
- September 21, 2023
A Search for Optical Laser Emission from Proxima Centauri
A search for laser light from Proxima Centauri was performed, including 107 high-resolution, optical spectra obtained between 2004 and 2019. Among them, 57 spectra contain multiple, confined spectral combs, each consisting of 10 closely-spaced frequencies of light.
The spectral combs, as entities, are themselves equally spaced with a frequency separation of 5800 GHz, rendering them unambiguously technological in origin. However, the combs do not originate at Proxima Centauri. Otherwise, the 107 spectra of Proxima Centauri show no evidence of technological signals from lasers or any optical light in a narrow range of wavelengths.
This search would have revealed lasers pointed toward Earth having a power of 20 to 120 kilowatts and located within the 1.3au field of view centered on Proxima Centauri, assuming a benchmark laser launcher having a 10-meter aperture.
Subjects: Earth and Planetary Astrophysics (astro-ph.EP); Instrumentation and Methods for Astrophysics (astro-ph.IM)
Geoffrey W. Marcy
Cite as: arXiv:2102.01910 [astro-ph.EP] (or arXiv:2102.01910v1 [astro-ph.EP] for this version)
From: Geoffrey W. Marcy [view email]
[v1] Wed, 3 Feb 2021 07:02:22 UTC (6,672 KB)