Could the ‘Wow’ signal have originated from a stochastic repeating beacon?
نویسندگان
چکیده
The famous "Wow" signal detected in 1977 remains arguably the most compelling SETI ever found. original Big Ear data requires that turned on/off over span of ~3 minutes (time difference between dual antennae), yet persisted for 72 seconds (duration a single beam sweep). Combined with substantial and negative follow-up efforts, these observations limit allowed range repeat schedules, to extent one might question credibility itself. Previous work has largely excluded hypothesis strictly periodic repeating source, periods shorter than 40 hours. However, non-periodic, stochastic repeater unexplored. Here, we employ likelihood emulator using observing logs infer probable properties under this hypothesis. We find maximum a-posteriori solution 32.3%, highly compatible data, broad 2 $\sigma$ credible interval duration secs < T 77 mins mean rate 0.043 1/days $\lambda$ 59.8 1/days. extend our analysis include 192 hours subsequent from META, Hobart ATA, which drops peak 1.78%, thus tension available at 2.4 level. Accordingly, Wow cannot be as estimate 62 days accumulated additional would necessary surpass 3 confidence.
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2022
ISSN: ['0035-8711', '1365-8711', '1365-2966']
DOI: https://doi.org/10.1093/mnras/stac1807