KIC 9832227: Red nova in 2022 ?

[Francois Teyssier]

According to a recent publication, the contact binary KIC 9832227 could produce a red nova event around 2022
https://arxiv.org/pdf/1704.05502.pdf

Many articles in popular science sites:

https://www.futura-sciences.com/sciences/actualites/etoile-spectacle-exceptionnel-collision-deux-etoiles-sera-visible-oeil-nu-2022-65881/

http://earthsky.org/space/star-predicted-to-explode-in-2022

Coordinates: 19 29 15.948 +46 37 19.89
V Mag = 12.4

A nice project for low res spectroscopy

Spectra are welcome for eruptive stars information letter

François Teyssier

Model of KIC 9832227 - Orbital period ~ 11 hours, declining

KIC.PNG (339.14 KiB) Viewed 1439 times

[Joan Guarro Flo]

To All,

Last night I observed the KIC 983227, which I saw in the images of the guide, through the ATIK 314L +, it seems that the star is kept close to 12.4 magnitude, as it has always done.

The 12.4 is very far from my instrumental, (you know that means more noise than a signal).

In graph 1, it shows what is "usable" of the 5 integrations of 2000 seconds.

In graph 2, we see the result of passing the option "Filter" to the ISIS. with a value of 15.5.

In graph 3, it is a comparison of the two graphs in the Ha region.

Regards, Joan.

[Francois Teyssier]

Belle tentative à cette résolution, Joan
Ce sera plus facile si l'événement nova prévu se produit.
François

[David Boyd]

I recorded photometry and a low resolution spectrum of this object on 18 April 2018. Magnitudes were B=13.17 and V=12.46. The spectrum is noisy but its general profile is in good agreement with spectral type G5V. VSX lists the spectral type as G5 and gives Frasca et al. Astronomy & Astrophysics, 594, A39 (2016) as source. The information is in the online version of their Table A.3.

David

_kic9832227_20180418_977_D.Boyd_flux.png (74.73 KiB) Viewed 1014 times

[Joan Guarro Flo]

Hello David,

Congrats for your spectrum, and many thanks for the specification of the spectral class to KIC 9832227, that I did not know.
I leave here again the graph 2, wihtout the instrumental response.

Regards, Joan.

[Forrest Sims]

I was able to capture spectrum data last night on KIC9832227 using my Shelyak LISA. My spectrum appears to match David’s very nicely. I have attached an annotated profile using Tim Lesters PlotSpectra and also the same profile but using the Rspec reference library where I searched for the best spectral type match to KIC9832227. As David said G5V gives the best match. My data is displayed in Red and the reference profile for a G5V star displayed in Blue.

Also Daniel M. Van Noord, a listed author on the paper that François referenced at the top of this thread, https://arxiv.org/pdf/1704.05502.pdf presented an update on KIC9832227 last week at the Society for Astronomical Sciences Symposium in Ontario California. His update was too new to be included in the proceedings papers. I must see if I can find a paper associated with his talk to share.

Cheers!
Woody

[Vincent Bouttard]

Hello

A low resolution spectrum of KIC 9832227 taken at OHP workshop.
20 x 300s with Alpy600 spectrograph on 250 mm F/4 Newtonian telescope. Really faint target (mag. 12.4).
The choice of the reference star was hazardous : HD200120 (B1.5Vnne)... So, the continuum is uncertain.

KIC9832227_20180714_921.png (6.17 KiB) Viewed 796 times

Vincent

[James Foster]

Looks like they'll be no red nova in the forseeable future......see:
https://calvin.edu/news/archive/team-of-researchers-challenge-bold-astronomical-prediction

James