[vsnet-chat 67] Re: SRc variables as supernova progenitors

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

Dear Ishida-san and chatters,

> If we can do it, surely Dr. Kato is right.  However, if the SRc 
> stage is so short in stellar evolution,  there exist only about 300 
> (for example)  SRc variables in our Galaxy, may be.   

    It's a surprise to know SRc variables in the Galaxy are so rare.
May I have some more questions regarding this?

1) Do all SRc variables have masses enough for producing SNe?
   If not, what fraction it might be, or can we select suitable targets
   using other easily known parameters (period of pulsation etc.) ?

2) Of all SNe II progenitors, what fractions of individal variable star
   classes (SRc, S Dor, ..) would be expected?  This knowledge might
   partly answer Monard's vsnet-chat 65.  If most SNe II explode from
   non-variable progenitors, I might lose my 1000-yr bet.

Regards,
Taichi Kato

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp