I The Sun's excess gamma rays and strange dips

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Any theory what could be causing the excess gamma ray and the strange dips in the sun?

https://www.quantamagazine.org/gamma-ray-data-reveal-surprises-about-the-sun-20190501/

"A decade’s worth of telescope observations of the sun have revealed a startling mystery: Gamma rays, the highest frequency waves of light, radiate from our nearest star seven times more abundantly than expected. Stranger still, despite this extreme excess of gamma rays overall, a narrow bandwidth of frequencies is curiously absent."

"But there are no good guesses about how the sun’s magnetic field might create the dip in the gamma-ray spectrum at 10 trillion trillion hertz. It’s such an unusual feature that some experts doubt that it’s real. But if the absence of gamma rays around that frequency is a miscalculation or a problem with Fermi’s instruments, no one has figured out the cause. “It does not seem to be any instrumental effect,” said Elena Orlando, an astrophysicist at Stanford and a member of the Fermi team."
 
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I think the article pretty much answers your question. No, we don’t have a good theory on it yet but people are interested and are modeling and studying it to understand why.
 

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