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A comment on First Detection of the 21cm Cosmic Dawn Signal. Parent comment

Re:First Detection of the 21cm Cosmic Dawn Signal by Sniffnoy on Wednesday March 14, 2018 @07:42PM (#16589382)
Question: Why the galactic synchrotron and not, say, the solar synchrotron? I'm assuming the latter exists but is negligible for some reason? Why is that?
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Re:First Detection of the 21cm Cosmic Dawn Signal by eosophos on Wednesday March 14, 2018 @10:35PM (#16590071)
Apparently the particles need to be relativistic, maybe the Sun doesn't generate enough acceleration compared to the central galactic supermassive black hole?
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