A long term spectroscopic and photometric study of the old nova HR Delphini
Journal: Astronomy and Astrophysics
Year: 2010

<i>Context. <i/>The Nova HR Del, discovered in 1967, was found to be exceptionally bright in the optical and UV during the whole lifetime of the IUE satellite (ending in 1996) and appears to still be extremely luminous today. The reason for this continuing activity is not clear, but continuing weak thermonuclear burning might be involved.<i>Aims. <i/>We therefore need to better understand the processes at play in HR Del.<i>Methods. <i/>HR Del was thus monitored over several years, both in broad