[vsnet-unknown 121] Re: MisV1147

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

Re: MisV1147

Doug West wrote:

> This implies the object gets bluer as during fading episodes, which isn't 
> consistent with the changes in V-R and R-I.  I am still working on the 
> spectral class based on R and I colors.

   This is one of the very signatures of deep Herbig Ae/Be-type fadings.
Assume a scattering body (like a circumstellar disk).  The scattering is
stronger in shorter wavelengths.  When the central star is obscured or
eclipsed, the bluer light from the scatterer becomes dominating.
(Polarization should become stronger then).

   On the assumed binarity of MisV1147, please refer to A&A 388, 563
(2002), which deals with a candidate eclipsing Herbig Ae/Be binary.
If the eclipsing nature of MisV1147 is confirmed, this object could
become a far clearer, short-period(!) object, which is totally surprising.

[I have been trying to encourage Yoshida-san to write some kind of
a letter paper based on these very exceptional findings, but my attempts
have not yet been successful.]

Regards,
Taichi Kato

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