V392 Per in outburst

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

Re: V392 Per in outburst

Postby Michel Verlinden » Sun May 27, 2018 7:52 pm

Merci François,
Comment expliques-tu les barres d'erreur importantes (+/- 50 km/s) sur les vitesses mesurées ?
Amicalement,
Michel Verlinden
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Re: V392 Per in outburst

Postby Francois Teyssier » Sun May 27, 2018 8:53 pm

Michel,
Je n'explique rien, juste une estimation à partir de ce je je vois des raies
Ce ne sont pas des valeurs importantes ( 5 à 10%). Incertitude assez classique pour des raies brillantes dans ce type d'objet. (idem pour les largeurs équivalentes)
Prends un spectre de la série. Détermine à quel endroit commence et finit le composant étroit. Pas facile. Il n'y a pas de continuum de référence, on essaye de mesurer une raie sur une autre raie.
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Re: V392 Per in outburst

Postby Robin Leadbeater » Fri Jun 01, 2018 10:29 am

I see the He II 4686 line mentioned in the Mason Munari paper

"The He ii 4686 Å narrow emission which appears at the onset of the nebular phase in both novae is somewhat controversial. Our
observations suggest that the corresponding line forming region is physically separated from the rest of the ejecta"

Also appeared in the V392Per spectra from 2018-05-13

viewtopic.php?f=5&t=2015&start=120#p10792

Robin
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Re: V392 Per in outburst

Postby Robin Leadbeater » Thu Jun 07, 2018 4:29 pm

A spectrum from last night, 2018-06-06. Further evolution in the region 4600-5100A, particularly on the blue edge of the broad blended region centred on 5000A

Robin

v392per_20180606_950_Leadbeater.png
v392per_20180606_950_Leadbeater.png (34.94 KiB) Viewed 308 times


v392per_20180508-0606_4550-5150A.png
v392per_20180508-0606_4550-5150A.png (54.95 KiB) Viewed 308 times
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Re: V392 Per in outburst

Postby Francois Teyssier » Thu Jun 07, 2018 6:42 pm

Impressive
The blend could be OIII, 5007 and 4959
There's also a broad line in the red of H gamma
If it is, there's no narrow component. Interesting!
François
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Re: V392 Per in outburst

Postby Robin Leadbeater » Thu Jun 07, 2018 10:21 pm

Hi Francois

Here is the region around H gamma/H delta from the start of the outburst to the present. It is probably fainter than mag 13 in B now and the bright sky and the 4.8 air mass means the SNR is rather low in this part of the spectrum unfortunately

Cheers
Robin

v392per_20180429-0606_4000-4500A.png
v392per_20180429-0606_4000-4500A.png (59.55 KiB) Viewed 283 times
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