Symbiotic recurrent nova RS Oph in ourburst !!!

Alerts and Monitoring of Novae
David Boyd
Posts: 161
Joined: Wed Dec 11, 2013 5:50 pm

Re: Symbiotic recurrent nova RS Oph in ourburst !!!

Post by David Boyd »

Here is a spectrum of the outburst taken tonight, 9th August, with a LISA. Very sharply peaked H-alpha line with FWZI of about 7000 km/s. Other Balmer lines similarly broad. I don't remember seeing a spectrum quite like this before!

David
rsoph_20210809_931_D_Boyd.png
rsoph_20210809_931_D_Boyd.png (26.61 KiB) Viewed 5024 times
Olivier GARDE
Posts: 1245
Joined: Thu Sep 29, 2011 6:35 am
Location: Rhône Alpes FRANCE
Contact:

Re: Symbiotic recurrent nova RS Oph in ourburst !!!

Post by Olivier GARDE »

Here's one of the 4 spectra taken this night with an eShel spectrograph R=11000

The full spectrum

Image

And H Alpha velocity graph

Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Dubreuil Pierre
Posts: 202
Joined: Sat Oct 01, 2011 12:34 pm

Re: Symbiotic recurrent nova RS Oph in ourburst !!!

Post by Dubreuil Pierre »

Bonjour à tous

Hier soir premiers spectres dans un ciel brumeux de Rs Oph region 3500A avec UVEX(4) .
Traitement complet CMED avec étoile de réf.
Le réseau 600tr/mm n'est pas optimisé pour l'UV (750nm ! )
Nova Rs Oph   UVEX(4) traitement CMED
Nova Rs Oph UVEX(4) traitement CMED
Rs Oph 20210809_817 UVEX(4) G600 ASI183MM RC8.png (9.61 KiB) Viewed 4997 times
avec identification raies Balmer
Spectre Rs Oph 3290 to 5335.png
Spectre Rs Oph 3290 to 5335.png (128.37 KiB) Viewed 4972 times
Je pense tenter avec le réseau 1200r/mm

Bon ciel à tous

Pierre
Paolo Berardi
Posts: 578
Joined: Thu Sep 29, 2011 10:51 pm

Re: Symbiotic recurrent nova RS Oph in ourburst !!!

Post by Paolo Berardi »

Hi all,

my contribution with some profiles, from H-alpha to NIR regions. Some clouds in the sky.

Image

Image

Image

Interesting, the O I 8446 emission line exhibits both components too, wide and narrow.

Thanks for the alert François!

Clear sky,
Paolo
Jean-Pierre Masviel
Posts: 35
Joined: Thu Oct 06, 2011 12:54 pm

Re: Symbiotic recurrent nova RS Oph in ourburst !!!

Post by Jean-Pierre Masviel »

Salut Pierre,

Qu'utilises-tu comme télescope ?
Sur un graphique, il est indiqué RC8, et sur l'autre SC8.

C'est un vrai problème de trouver un tube dont les optiques traitées ne mangent pas tout le flux en dessous de 400 nm.
GSO donne ce graphe:
gso-99-prozent-reflexionsspektrum_-1000.jpg
gso-99-prozent-reflexionsspektrum_-1000.jpg (35.06 KiB) Viewed 4956 times

Jean-Pierre
LHIRES III # 24, ALPY 600, Atik 314
http://astrosurf.com/jpmasviel/
Daniel Dejean
Posts: 127
Joined: Sun Sep 18, 2016 7:20 am

Re: Symbiotic recurrent nova RS Oph in ourburst !!!

Post by Daniel Dejean »

Hello,
My modest contribution at (very) low resolution around 350. Not the best setup at such magnitude level... :)

Image
Vincent Lecocq
Posts: 40
Joined: Fri Mar 04, 2016 3:52 pm

Re: Symbiotic recurrent nova RS Oph in ourburst !!!

Post by Vincent Lecocq »

hello,

my low-res contribution:

vincent
Attachments
Figure_1.png
Dubreuil Pierre
Posts: 202
Joined: Sat Oct 01, 2011 12:34 pm

Re: Symbiotic recurrent nova RS Oph in ourburst !!!

Post by Dubreuil Pierre »

Bonsoir Jean-Pierre

Bien vu, le "spectre couleurs" qui génère en Python l'entête donne bien le bon télescope qui est bien un RC8 de mon poste fixe, mais j'ai aussi fait avec SC8 la semaine dernier en nomade .
L'entête du spectre N&B est renseigné manuellement !

Je râle un peu car le réseau était fait pour l'IR. Je dois commander un 600tr pour UV pour avoir toute la chaine qui va bien .

Ce soir ciel blanc donc pas de spectre, surtout que demain journée publique Sol'Ex à Valberg.

Bons spectres à tous

Pierre
Francois Teyssier
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Joined: Fri Sep 23, 2011 1:01 pm
Location: Rouen
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Re: Symbiotic recurrent nova RS Oph in ourburst !!!

Post by Francois Teyssier »

Very sharply peaked H-alpha line with FWZI of about 7000 km/s.
Yes
The two main guidelines
to understand the formation of Balmer lines:
1. It is a recurrent nova,thus the white dwarf is massive, near Chandrasekar limit: a faint amount of accreted matter is sufficient to produce a nova outburst and the velocity of the ejecta is very high (not far from a SN!): this is the main broad component of HI lines.
2. The nova event appears in a symbiotic system with a high density nebula produced by the wind of the red giant (velocity of ~ few 10 km/s). The nebula, partially ionized in "quiescent" state, is strongly ionized by the nova phenomenon and recombines: this forms the narrow component.

See also V3890 Sgr as another example: https://aras-database.github.io/database/v3890sgr.html

Bonnes observations!
David Boyd
Posts: 161
Joined: Wed Dec 11, 2013 5:50 pm

Re: Symbiotic recurrent nova RS Oph in ourburst !!!

Post by David Boyd »

The spectrum of RS Oph has dropped in flux by almost a half in the last 24 hrs as it starts to fade. The shape of the Balmer lines has subtly changed.

David
rsoph_20210809_931_D_Boyd.png
rsoph_20210809_931_D_Boyd.png (37.45 KiB) Viewed 4907 times
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