[vsnet-chat 2991] Re: R CrB stars

[Taichi Kato <tkato>]

Re: R CrB stars

> There are not R Cor Bor type stars. 
> There are stars with the R CrB type variablity! 

   Whether it will be adequate or not to call sudden fadings caused by
dust formation as the R CrB type variablity, this process has been widely
observed in different sort of objects (R CrB stars themselves, carbon stars,
RVB minimum (possible), DQ Her-type novae etc.).

   However, the population of R CrB stars definitely exists, sharing some
common characterstics (see Clayton's review).  It is not clear whether
this class of variable represents a single or multiple classes of objects
(e.g. in evolution), or whether the class has a definite borderline between
R CrB stars and other variable stars.

Regards,
Taichi Kato

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