
Marina Orio (Department of Astronomy, University of Wisconsin, Madison and Astronomical Observatory Padova)
Nova outburst are true multi-wavelength and probably multi-messenger sources, emitting copious flux from the radio range to gamma-rays; a nearby symbiotic nova may also have a measurable neutrino flux. I observe novae in X-rays to study the physical parameters of the massive white dwarfs in novae, and to obtain the spectra of the ejecta. The latter reveal new - or seldom observed - atomic physics. I will summarize how our findings are constraining binary evolution, and how we learn new facts about violent astrophysical shocks.