355 citations · 866 across the 8 of their papers we have counts for
8 papers
High Velocity Circumstellar Gas Orbiting a White Dwarf Star
B. Zuckerman, Érika Le Bourdais, Beth L. Klein +6
Numerous white dwarf stars are known to be orbited by disks of gas and dust. To date, broad, about 300 km s-1 wide, gaseous circumstellar absorption features have only been reporte…
Discovery of a runaway star likely ejected by a Type Iax Supernova
A. Bhat, M. Hollands, M. Dorsch +5
Over the past decade, runaway stars have been identified, believed to originate either as surviving donors of Type Ia supernovae or as partially deflagrated accretors producing Typ…
The ESO supernovae type Ia progenitor survey (SPY)
R. Napiwotzki, C. A. Karl, T. Lisker +13
Close double degenerate binaries are one of the favoured progenitor channels for type Ia supernovae, but it is unclear how many suitable systems there are in the Galaxy. We report…
Gaseous Material Orbiting the Polluted, Dusty White Dwarf HE1349-2305
Carl Melis, P. Dufour, J. Farihi +6
We present new spectroscopic observations of the polluted, dusty, helium-dominated atmosphere white dwarf star HE1349-2305. Optical spectroscopy reveals weak CaII infrared triplet…
A Spitzer Space Telescope Study of the Debris Disks around four SDSS White Dwarfs
Carolyn Brinkworth, Boris Gaensicke, Jon Girven +4
We present Spitzer Space Telescope data of four isolated white dwarfs that were previously known to harbor circumstellar gaseous disks. IRAC photometry shows a significant infrared…
Possible Signs of Water and Differentiation in a Rocky Exoplanetary Body
J. Farihi, C. S. Brinkworth, B. T. Gaensicke +5
Spitzer observations reveal the presence of warm debris from a tidally destroyed rocky and possibly icy planetary body orbiting the white dwarf GD 61. Ultraviolet and optical spect…
Ancient planetary systems are orbiting a large fraction of white dwarf stars
B. Zuckerman, C. Melis, B. Klein +2
Infrared studies have revealed debris likely related to planet formation in orbit around ~30% of youthful, intermediate mass, main sequence stars. We present evidence, based on atm…
Chemical Abundances in the Externally Polluted White Dwarf GD 40: Evidence of a Rocky Extrasolar Minor Planet
B. Klein, M. Jura, D. Koester +2
We present Keck/HIRES data with model atmosphere analysis of the helium-dominated polluted white dwarf GD 40, in which we measure atmospheric abundances relative to helium of 9 ele…