KIC 9832227: Red nova in 2022 ?

Information about outbursts of eruptive stars, Be activity, ...

Re: KIC 9832227: Red nova in 2022 ?

Postby Joan Guarro Flo » Fri Jul 05, 2019 2:07 pm

Hello Forrest,

Many thanks Jim for your fquick answer, at the moment seems that the star don't give any signs of spectroscòpical instability and his magnitude seems constant too.

Perhaps someone should tell us which are the possible symptoms and alterations before to this possible nova-explosion.

Regards, Joan.
Joan Guarro Flo
 
Posts: 365
Joined: Thu Nov 03, 2011 8:50 pm

Re: KIC 9832227: Red nova in 2022 ?

Postby Martin Dubs » Sun Jul 07, 2019 10:07 pm

Hello Joan,

in the case that after all KIC 9832227 should evolve into a red nova I would expect it to be similar to a previous red nova V1309 Sco which erupted in 2008. It is described in a paper by R.Tylenda et. al. in A&A:
https://www.aanda.org/articles/aa/pdf/2011/04/aa16221-10.pdf
It looks that there is plenty of warning time before the actual outburst and about 6 months for the outburst itself to maximum. With a brightness about 6 magnitudes brighter than the progenitor it should be an easy target.
But as it has been pointed out before, chances that this will happen are rather slim, but you may take an occasional spectrum of it anyway.

Regards, Martin
Martin Dubs
 
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Location: Maienfeld, Switzerland

Re: KIC 9832227: Red nova in 2022 ?

Postby Joan Guarro Flo » Mon Jul 08, 2019 8:31 pm

Hi Martin,

Many thanks for your very well information. I think the way is going to watching this star from time on time .., to see what happens.

Friendly, Joan.
Joan Guarro Flo
 
Posts: 365
Joined: Thu Nov 03, 2011 8:50 pm

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