Betelgeuse’s colour changed in the last 2 millenia

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  • #611411
    Jeremy Shears
    Participant

    ….is the fascinating conclusion of an MNRAS preprint:https://arxiv.org/abs/2207.04702

    Analysis of observations recorded in Chinese and Roman texts suggests it was not red 2 millenia ago. The authors claim this is observational evidence of stellar evolution in action.

    #611414
    Paul Leyland
    Participant

    Oh no, not again. You can not be Sirius!

    Get your popcorn ready. This should be entertaining when the other astrophysicists start laying into it. (Though the claimed 5.1σ is interesting.)

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