606 citations · 3.4k across the 36 of their papers we have counts for
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Unusual Abundances from Planetary System Material Polluting the White Dwarf G238-44
Ted M Johnson, Beth L. Klein, D. Koester +3
Ultraviolet and optical spectra of the hydrogen-dominated atmosphere white dwarf star G238-44 obtained with FUSE, Keck/HIRES, HST/COS, and HST/STIS reveal ten elements heavier than…
Near-infrared variability in dusty white dwarfs: tracing the accretion of planetary material
Laura K. Rogers, Siyi Xu, Amy Bonsor +4
The inwards scattering of planetesimals towards white dwarfs is expected to be a stochastic process with variability on human time-scales. The planetesimals tidally disrupt at the…
Shallow Ultraviolet Transits of WD 1145+017
Siyi Xu, Na'ama Hallakoun, Bruce Gary +16
WD 1145+017 is a unique white dwarf system that has a heavily polluted atmosphere, an infrared excess from a dust disk, numerous broad absorption lines from circumstellar gas, and…
A dearth of small particles in the transiting material around the white dwarf WD 1145+017
S. Xu, S. Rappaport, R. van Lieshout +35
White dwarf WD 1145+017 is orbited by several clouds of dust, possibly emanating from actively disintegrating bodies. These dust clouds reveal themselves through deep, broad, and e…
Evidence for Gas from a Disintegrating Extrasolar Asteroid
S. Xu, M. Jura, P. Dufour +1
We report high-resolution spectroscopic observations of WD 1145+017 -- a white dwarf that recently has been found to be transitted by multiple asteroid-sized objects within its tid…
The bulk composition of exo-planets
Boris Gaensicke, John Debes, Patrick Dufour +7
Priorities in exo-planet research are rapidly moving from finding planets to characterizing their physical properties. Of key importance is their chemical composition, which feeds…