S CrB record maximum brightness

Forums Variable Stars S CrB record maximum brightness

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  • #611343
    Robin Leadbeater
    Participant

    I took a low resolution spectrum of Mira variable S CrB at its record brightness last night so I thought I would try to put the current brightness level into context. Here is a plot of the historic visual maxima since 1900 from the AAVSO data. The brightness is currently ~3 sigma away from the mean maximum.

    Cheers
    Robin

    #611363
    Dr Paul Leyland
    Participant

    Wow! Even the particle physicist start talking about possible discoveries at that significant.

    #611364
    Robin Leadbeater
    Participant

    I guess one 3 sigma event in ~120 tries is not too surprising.

    #611490
    Robin Leadbeater
    Participant

    Now past maximum. My two low resolution spectra bracketing the maximum here

    https://britastro.org/observations/observation.php?id=20220718_154759_9e171ab7b4e26e1f

    Cheers
    Robin

    #612329
    Robin Leadbeater
    Participant

    A comparison of the spectrum this maximum with that by Miguel Rodriguez at a more typical maximum is in the latest BAA VSSC
    https://britastro.org/vss/VSSC193.pdf
    page 16

    It has now faded to visual magnitude ~7, a brightness more like that typically seen at maximum. The temperature from the TiO bands in the spectrum spectrum has dropped to that more typically seen at maximum, though the intensity of the Balmer emission remains high. Attached is a comparison between my most recent spectrum and that of Miguel Rodriguez taken at the 2020 maximum.

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