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The Highly Variable Wind from WD J005311, the Stellar Remnant of the Peculiar Galactic Supernova of 1181
C. Alexander Thomas, Peter Garnavich, Charlotte Wood +2
WD J005311 is the peculiar stellar remnant of the Galactic supernova from 1181, and appears to have been the merger of two white dwarfs. We present time-resolved spectroscopy of WD…
The TRENDS High-contrast Imaging Survey. VIII. Compendium of Benchmark Objects
Erica J. Gonzales, Justin R. Crepp, Eric B. Bechter +5
The physical properties of faint stellar and substellar objects often rely on indirect, model-dependent estimates. For example, the masses of brown dwarfs are usually inferred usin…
Rapid Variability in the Wind from the White Dwarf Merger Candidate J005311
P. Garnavich, C. Littlefield, R. Pogge +1
We analyze time-series spectroscopy of the white dwarf merger candidate J005311 and confirm the unique nature of its optical spectrum. We detect an additional broad emission featur…
Benchmarking Substellar Evolutionary Models Using New Age Estimates for HD 4747 B and HD 19467 B
Charlotte M. Wood, Tabetha Boyajian, Kaspar von Braun +5
Constraining substellar evolutionary models (SSEMs) is particularly difficult due to a degeneracy between the mass, age, and luminosity of a brown dwarf. In cases where a brown dwa…
High-Time-Resolution Photometry of AR Scorpii: Confirmation of the White Dwarf's Spin-Down
Robert A. Stiller, Colin Littlefield, Peter Garnavich +3
The unique binary AR Scorpii consists of an asynchronously rotating, magnetized white dwarf (WD) that interacts with its red-dwarf companion to produce a large-amplitude, highly co…