[vsnet-chat 1575] Re: (fwd) query on SN IIn

[Hitoshi YAMAOKA <yamaoka@rc.kyushu-u.ac.jp>]

Dear all,

>    I think the original (and other readers') interest may refer to the
>nature of the narrow line.  

It would be "your" interest, Taichi ;-)

>Would it be possible to more explain the
>supposed origin of such narrow lines in SNe spectra?  Some recent SNe IIn
>are known to have higher luminosities than ordinary SNe II.  Is there
>any explanation for this?

I have little to say about them....  SNe spectra triggered by
gravitational collapse differ from one to another, because of the
difference of the outer envelope region, not of the central core.  The
brightness of supernovae is determined by the central nucleosynthesis,
so it is not well-known how to connect the spectral details and its
brightness.  

It may be a hint that some recent peculiar SNe Ic (1997ef, 1998bw) are
also very luminous.  They are thought to be an explosion of highly
mass-lossed massive star.  

Sincerely Yours,
Hitoshi Yamaoka, Kyushu Univ., Japan
yamaoka@rc.kyushu-u.ac.jp

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