KIC 9832227: Red nova in 2022 ?

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KIC 9832227: Red nova in 2022 ?

Postby Francois Teyssier » Tue Dec 19, 2017 7:15 am

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
KIC.PNG (339.14 KiB) Viewed 7403 times
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Re: KIC 9832227: Red nova in 2022 ?

Postby Joan Guarro Flo » Wed Jun 20, 2018 3:44 pm

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.
Attachments
_kic9832227_20180619_880_J. Guarro.png
_kic9832227_20180619_880_J. Guarro.png (54.46 KiB) Viewed 7030 times
_kic9832227_20180619_880_J. Guarro155.png
_kic9832227_20180619_880_J. Guarro155.png (51.34 KiB) Viewed 7030 times
_kic9832227_20180619_880_J. GuarroDET.png
_kic9832227_20180619_880_J. GuarroDET.png (70.4 KiB) Viewed 7030 times
Joan Guarro Flo
 
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Re: KIC 9832227: Red nova in 2022 ?

Postby Francois Teyssier » Wed Jun 20, 2018 8:47 pm

Belle tentative à cette résolution, Joan
Ce sera plus facile si l'événement nova prévu se produit.
François
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Re: KIC 9832227: Red nova in 2022 ?

Postby David Boyd » Thu Jun 21, 2018 10:39 am

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
_kic9832227_20180418_977_D.Boyd_flux.png (74.73 KiB) Viewed 6979 times
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Re: KIC 9832227: Red nova in 2022 ?

Postby Joan Guarro Flo » Thu Jun 21, 2018 11:48 am

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.
Attachments
_kic9832227_20180619_880_J. GuarroIR.png
_kic9832227_20180619_880_J. GuarroIR.png (66.77 KiB) Viewed 6973 times
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Re: KIC 9832227: Red nova in 2022 ?

Postby Forrest Sims » Thu Jun 21, 2018 5:03 pm

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
Attachments
KIC9832227 comparison to G5V star using Rspec.PNG
KIC9832227 comparison to G5V star using Rspec.PNG (44.1 KiB) Viewed 6950 times
kic9832227_20180621_216_Forrest Sims annotated.png
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Re: KIC 9832227: Red nova in 2022 ?

Postby Vincent Bouttard » Fri Jul 20, 2018 6:07 pm

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
KIC9832227_20180714_921.png (6.17 KiB) Viewed 6761 times


Vincent
VBO @ ARAS database : Newtonian 250 mm F/4 / Alpy600 / Atik 460EX
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Re: KIC 9832227: Red nova in 2022 ?

Postby James Foster » Sun Sep 09, 2018 10:20 am

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
James Foster
Lhires III (2400/1800/600 ln/mm Grat) Spectroscope,
LISA IR/Visual Spectroscope (IR Configured Presently)
Alpy 600 with Guide/Calibration modules and Photometric slit
Star Analyzer 200
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Re: KIC 9832227: Red nova in 2022 ?

Postby Joan Guarro Flo » Mon Jul 01, 2019 4:39 pm

Hello,

In this picture we're seeing one graphic of KIC8932227 to the last month and his comparison with another one to last year.

Due to low magnitude of this star, 12.3 v.m., this graphics are very squematic. I think David Boyd, Forrest Sims, Vicent Bouttard or someone, may try repeat by low resolution with more very well results.

The predictions wait a possible type nova explosion, in next 2022. One question, in this case can we will see some intense lighting variations or some pulsations mode before to definitive explosion?

Regars, Joan.
Attachments
KIC9832227-18-19.png
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Re: KIC 9832227: Red nova in 2022 ?

Postby Forrest Sims » Thu Jul 04, 2019 6:47 pm

Hello Joan,

I accepted your challenge to take spectra of KIC9832227:) Here is a plot of my data from last night and also a plot comparison with data I acquired one year ago. I see a similar change as you have shown above. I used the Shelyak LISA, taking 9 600sec exposures, I used HD192640 as a reference star to correct for instrument and atmospheric response. ISIS reported a resolution of R=1046 for last nights data.

Regards,

Woody Sims
Attachments
kic9832227_Comparison_Forrest Sims.png
kic9832227_20190704_249_Forrest Sims.png
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