19.6k citations · 49.7k across the 248 of their papers we have counts for
6 papers · 1 filter
Rapid Evolution of the White Dwarf Pulsar AR Scorpii
Peter Garnavich, Stephen B. Potter, David A. H. Buckley +4
Analysis of AR Sco optical light curves spanning nine years show a secular change in the relative amplitudes of the beat pulse pairs generated by the two magnetic poles of its rota…
A Phenomenon Resembling Early Superhumps in a New SU UMa-Type Dwarf Nova with a 2-Hour Orbital Period
Rebecca Boyle, Colin Littlefield, Peter Garnavich +4
We investigate K2BS5, an optical transient that we identified in Campaign 13 of the Kepler/K2 archives by the "K2 Background Survey", and classify it as a new SU UMa-type dwarf nov…
Ground-based and JWST Observations of SN 2022pul: I. Unusual Signatures of Carbon, Oxygen, and Circumstellar Interaction in a Peculiar Type Ia Supernova
Matthew R. Siebert, Lindsey A. Kwok, Joel Johansson +79
Nebular-phase observations of peculiar Type Ia supernovae (SNe Ia) provide important constraints on progenitor scenarios and explosion dynamics for both these rare SNe and the more…
A Surprising Periodicity Detected During a Super-outburst of V844 Herculis by TESS
A. Greiveldinger, P. Garnavich, C. Littlefield +6
We identify a previously undetected periodicity at a frequency of 49.080.01 d (period of 29.340.01 minutes) during a super-outburst of V844 Her observed by TESS. V…
Ground-based and JWST Observations of SN 2022pul: II. Evidence from Nebular Spectroscopy for a Violent Merger in a Peculiar Type-Ia Supernova
Lindsey A. Kwok, Matthew R. Siebert, Joel Johansson +78
We present an analysis of ground-based and JWST observations of SN~2022pul, a peculiar "03fg-like" (or "super-Chandrasekhar") Type Ia supernova (SN Ia), in the nebular phase at 338…
SDSS J134441.83+204408.3: A highly asynchronous, short-period magnetic cataclysmic variable with a 56 MG field strength
Colin Littlefield, Paul A. Mason, Peter Garnavich +6
When the accreting white dwarf in a magnetic cataclysmic variable star (mCV) has a field strength in excess of 10 MG, it is expected to synchronize its rotational frequency to the…