The first nova eruption in a novalike variable: YZ Ret as seen in X-rays and gamma-rays

Understand

Peaking at 3.7 mag on 2020 July 11, YZ Ret was the second-brightest nova of the decade.

• The nova's moderate proximity (2.7 kpc from Gaia) provided an opportunity to explore its multi-wavelength properties in great detail.
• Here we report on YZ Ret as part of a long-term project to identify the physical mechanisms responsible for high-energy emission in classical novae.
• We use simultaneous Fermi/LAT and NuSTAR observations complemented by XMM-Newton X-ray grating spectroscopy to probe the physical parameters of the shocked ejecta and the nova-hosting white dwarf.