NOVA Cyg 2014

An amateur spectroscopic survey of a peculiar Nova

update 30-05-2014



The peculiar lightcurve of Nova Cyg 2014


red dots = ARAS Spectra


Selected spectra from ARAS data base

The spectra are flux calibrated, using AAVSO data base (V band)



AAVSO Light curve (V + Vis.) Full optical range [4000-7500 Å] Flux : Logarithmic scale H alpha H beta

Step by step evolution


After the classical rapid rise in luminosity, the slope changes between JD 2456750.0 and JD 2456754.9

During the premaximum halt (?), the absorptions disappear.



At maximum luminosity, emission lines vanish and strong absorptions reappear.



The maximum is followed by a very fast decline from Mag V = 9.4 to 10.8 (14/04/2014) in four days (about 0.35 mag/day)

During this first phase of this decline, absorptions disappear. The Balmer lines evolve : a broad piedestal (FWZI = 2700 km/s) appear.



At the minimum (JD 2456761.9), 4 days (V = + 1.5 mag) after maximum the emission lines are broader




















Evolution of the absorption system











List of observers

C. Buil
O. Garde
A. Garcia
P. Gerlach
T. Lester
J. Montier
F. Teyssier