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If so, why? Are they known to be surrounded by large amounts of dust? Do they typically flare?

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    $\begingroup$ What do you mean by "strong"? Compared to what? $\endgroup$
    – ProfRob
    Aug 10, 2019 at 16:37

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Yes, red dwarfs are strong in the infra-red. This is because they are much cooler than our sun, and just like a red hot poker which has cooled from being yellow hot, their emissions are redder. It takes less energy to emit red light than to emit longer wavelengths, and still less energy to emit in the infra-red. Being much smaller than the sun and with less fusion taking place, red dwarfs have less energy.They are known to emit flares, sometimes quite large ones.

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  • $\begingroup$ Thanks for your answer. From the blackbody spectrum, we wouldn't expect red dwarfs to be strong emitters in the submillimeter correct? Is this true to observation? $\endgroup$
    – user28693
    Aug 10, 2019 at 16:38

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