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A rotating white dwarf shows different compositions on its opposite faces
Ilaria Caiazzo, Kevin B. Burdge, Pier-Emmanuel Tremblay +35
White dwarfs, the extremely dense remnants left behind by most stars after their death, are characterised by a mass comparable to that of the Sun compressed into the size of an Ear…
An Eclipsing 47 minute Double White Dwarf Binary at 400 pc
James Munday, P. -E. Tremblay, J. J. Hermes +20
We present the discovery of the eclipsing double white dwarf (WD) binary WDJ 022558.21-692025.38 that has an orbital period of 47.19 min. Following identification with the Transiti…
An irradiated-Jupiter analogue hotter than the Sun
Na'ama Hallakoun, Dan Maoz, Alina G. Istrate +10
Planets orbiting close to hot stars experience intense extreme-ultraviolet radiation, potentially leading to atmosphere evaporation and to thermal dissociation of molecules. Howeve…
The first massive compact companion in a wide orbit around a hot subdwarf star
S. Geier, M. Dorsch, H. Dawson +5
We report the discovery of the first hot subdwarf B (sdB) star with a massive compact companion in a wide () binary system. It was discovered based on an a…
A catalogue of cataclysmic variables from 20 years of the Sloan Digital Sky Survey with new classifications, periods, trends and oddities
Keith Inight, Boris Gänsicke, Elmé Breedt +7
We present a catalogue of 507 cataclysmic variables (CVs) observed in SDSS I to IV including 70 new classifications collated from multiple archival data sets. This represents the l…
Orbital decay in an accreting and eclipsing 13.7 minute orbital period binary with a luminous donor
Kevin B. Burdge, Kareem El-Badry, Saul Rappaport +24
We report the discovery of ZTF J0127+5258, a compact mass-transferring binary with an orbital period of 13.7 minutes. The system contains a white dwarf accretor, which likely origi…
Photometric follow-up of 43 new eclipsing white dwarf plus main-sequence binaries from the ZTF survey
Alex J. Brown, Steven G. Parsons, Jan van Roestel +12
Wide-field time-domain photometric sky surveys are now finding hundreds of eclipsing white dwarf plus M dwarf binaries, a population encompassing a wealth of information and potent…
LISA Galactic binaries with astrometry from Gaia DR3
Thomas Kupfer, Valeriya Korol, Tyson B. Littenberg +11
Galactic compact binaries with orbital periods shorter than a few hours emit detectable gravitational waves at low frequencies. Their gravitational wave signals can be detected wit…
A black widow population dissection through HiPERCAM multi-band light curve modelling
D. Mata Sánchez, M. R. Kennedy, C. J. Clark +7
Black widows are extreme millisecond pulsar binaries where the pulsar wind ablates their low-mass companion stars. Their optical light curves vary periodically due to the high irra…
A rapid optical and X-ray timing study of the neutron star X-ray binary Swift J1858.6-0814
T. Shahbaz, J. A. Paice, K. M. Rajwade +8
We present a rapid timing analysis of optical (HiPERCAM and ULTRACAM) and X-ray (NICER) observations of the X-ray transient Swift J1858.6-0814 during 2018 and 2019. The optical lig…