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Dear colleagues, Philip Bennett (my professional supervisor in researching the system VV Cep) asked me to share the following message in this forum: -------------------------------------------------------------------------------------------------------------------------------------------------------...

Nova Cas 2021
Sill bright
Mag ~ 11.5
Follow up strongly recommended

Here's a list of "recent old novae", magnitude < 15.5 whose deserve continuous observations. They may be: - novae in nebular phase Ex.: V1606 Vul - peculiar very slow novae Ex. : V1405 cas - symbiotic novae (very slow) Ex. : CN Cha Source: AAVSO Update: 23-09-2022 Vlast, Dlast: last magnit...

IOP Publishing condemns Russia’s actions against Ukraine which are a violation of one of the most fundamental norms of international law that prohibits the use or threat of force by one state against another. As a member of the European Physical Society we support the statement of the Executive Comm...

Pour faciliter le suivi des discussions portant sur la spectrométrie cométaire, tous les sujets relatifs aux comètes qui sont actuellement dispersés dans plusieurs autres index du forum vont être progressivement regroupés dans l'index "comets" qui se trouve dans" Outbursts, Alerts, Mo...

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ARAS Forum was created 10 years ago, on September 23th, 2011.
The 300th member was registred today. Welcome to Norbert Jorum.
All the best and thank you for your participation!

François Teyssier

Attempt of lines identification on echelle spectra secured respectively by Joan Guarro and François Teyssier. RSOph1.png RSOph2.png RSOph3.png RSOph4.png RSOph5.png For He II 4686, [Fe VII] the following monitoring will allow to remove the doubt. At date, we are almost sure of [Ar III] Of course, an...

Hi Friends, Good job whith UVEX for calibration what is your process ? The subject of this topic is the nova outburst of RS OPh in 2021, its photometric and spectroscopic development, the underlying physics ... For technical discussions, please use the dedicated forum (including for instance a link ...

Has anyone interpreted the reason for the growth of that line over time? JJ It is He II 4686 and/or NIII/CIII blend The envelop recedes and its temperature is rising (perfect gas law): the ionization strengthen (~ 50 000 K), thus He II is doubly ionized and recombination produces the increase of He...