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Revisiting the classics: On the evolutionary origin of the "Fe II" and "He/N" spectral classes of novae
E. Aydi, L. Chomiuk, J. Strader +21
The optical spectra of novae are characterized by emission lines from the hydrogen Balmer series and either Fe II or He/N, leading to their traditional classification into two spec…
The "super-active" accretion phase of T CrB has ended
U. Munari
The symbiotic recurrent nova T CrB erupted for the second and last recorded time in 1946. Following the outburst, the accretion rate onto its WD has remained rather low with only o…
Atlas of photometric and spectroscopic daily monitoring of the very slow Nova Cas 2021 (=V1405 Cas) during the first 660 days of its outburst
P. Valisa, U. Munari, S. Dallaporta +2
Nova Cas 2021 erupted on 18 March 2021, reaching naked-eye brightness when passing through photometric maximum 53 days later. We describe our ~daily monitoring of its evolution, co…
V994 Her: A Unique Triply Eclipsing Sextuple Star System
P. Zasche, T. Borkovits, R. Jayaraman +23
We report the discovery with of a third set of eclipses from V994 Herculis (TIC 424508303), previously only known as a doubly-eclipsing system. The key implication of this d…
V5856 Sagittarii/2016: Broad Multi-Epoch Spectral Coverage of a Sustained High Luminosity Nova
Robert Williams, Frederick M. Walter, Richard J. Rudy +4
Nova V5856 Sagittarii is unique for having remained more than nine magnitudes above its pre-outburst brightness for more than six years. Extensive visible and IR spectra from the t…
Radio interferometric imaging of RS Oph bipolar ejecta for the 2021 nova outburst
U. Munari, M. Giroletti, B. Marcote +5
The recurrent nova and symbiotic binary RS Oph erupted again in August 2021 for its eighth known outburst. As part of a multi-epoch and frequency campaign, we observed RS Oph 34 da…