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VLBA Images of the Fastest Nova V1674 Her

Presentation #109.06 in the session Cataclysmic Variables, Novae, Symbiotic Stars and White Dwarfs.

Published onJul 01, 2023
VLBA Images of the Fastest Nova V1674 Her

V1674 Her is a classical nova that erupted in June of 2021. The evolution of the eruption is considered one of the fastest observed fading two magnitudes from the peak optical magnitude in ~1.2 days. The host system of a white dwarf and a dwarf companion has an orbital period of about 3.67 hours. The nova was detected in X-ray with both NuSTAR & Swift, gamma-rays with Fermi-LAT, and radio using the VLA. We observed the system four times with the Very Long Baseline Array (VLBA) at 20, 24, 35, and 71 days after eruption. The VLBA observations confirm non-thermal emission from the nova. VLBI detections of classical novae with dwarf companions are rare, with resolved radio synchrotron components reported in only one other such novae to date (V959 Mon). We present these preliminary resolved images to trace the evolution of the non-thermal radio components. We compare the non-thermal emission to the thermal radio light curves obtained by the VLA.

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