[vsnet-chat 2984] Cool R CrB stars?

[Taichi Kato <tkato>]

Cool R CrB stars?

   Further to add, some LMC carbon stars discovered by the MACHO collaboration
team show light curves quite similar to that of DY Per.  The MACHO team
explained the light curve by the combination of superimposed periodicity.

   Some carbon Mira stars are known to show episoding fading, presumably
caused by dust condensation.  The best known example, followed by optical-IR
observations, may be R For.  One of the northern star, V366 Lac = AFGL 2881,
originally discovered as a carbon Mira star, faded dramatically.  This
object has been observed sporadically by a number of observers, but never
detected positivity.  Could this be interpreted as M+RCB?

Regards,
Taichi Kato

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