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Classical Nova V1405 Cas Had and so is Unlikely to be a Type Ia Supernova Progenitor
Bradley E. Schaefer
Nova 2021 Cassiopeia (V1405 Cas) was an ordinary J(175) neon nova with the white dwarf mass estimated to be =0.600.10 . I found an orbital period of …
FQ Circini: An Ordinary Nova with a High-mass B1 V(n)(e) Companion Whose Decretion Disk Transfers Mass to the White Dwarf via Roche-Lobe Overflow
Bradley E. Schaefer, Andrew Pearce, Tom Love +4
FQ Cir was an ordinary fast He/N classical nova, peaking at =10.9. The pre-eruption and post-eruption counterpart was at =14.0, making the smallest known classical nova ampli…
HD 5501: A Rapidly Evolving Interacting Eclipsing Binary with a Variable Light Curve and H Emission
Richard O. Gray, Christopher. J. Corbally, Sean Curry +19
HD~5501, a hitherto little studied eclipsing binary with an early A-type primary, has been caught in a short-lived, astrophysically interesting phase of its binary evolution. Recen…
Light Curves For Ten R Coronae Borealis Stars For Longer Than a Century: Secular Evolution, Dip Statistics, and a General Model for the Shape of Isolated Light Curve Dips
Bradley E. Schaefer
R Coronae Borealis stars (RCBs) are cool supergiants that display non-periodic deep dips in brightness. Recently, a group of `Hot RCB stars` has been discovered to be fast evolving…