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astro-ph.SR2026
Two Predicted, Concentric Nova Shells Surround the Prototype Dwarf Nova U Geminorum
Michael M. Shara, Kenneth M. Lanzetta, Aayushi Doshi +7
In the 170 years since its discovery, U Gem has been intensively studied as the prototypical cataclysmic binary star. Its massive white dwarf (WD) (~ 1.2 Msun) is cannibalizing its…
astro-ph.SR2025
Was there a (super)nova in 1408?
Boshun Yang, Nikolaus Vogt, Susanne M Hoffmann
The 1408 CE "guest star" recorded in Chinese historical texts presents a compelling case for identifying a historical stellar transient. While previous studies debated its nature a…