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- Centre National de la Recherche ScientifiqueFR225 papers
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19 papers · 2 filters
New white dwarf stars in the Sloan Digital Sky Survey Data Release 10
S. O. Kepler, Ingrid Pelisoli, Detlev Koester +11
We report the discovery of 9 089 new spectroscopically confirmed white dwarfs and subdwarfs in the Sloan Digital Sky Survey Data Release 10. We obtain Teff, log g and mass for hydr…
The Solar Energetic Particle Event on 2013 April 11: An Investigation of its Solar Origin and Longitudinal Spread
D. Lario, N. E. Raouafi, R. -Y. Kwon +4
We investigate the solar phenomena associated with the origin of the solar energetic particle (SEP) event observed on 2013 April 11 by a number of spacecraft distributed in the inn…
Variable Emission from a Gaseous Disc around a Metal-Polluted White Dwarf
David J Wilson, Boris Gaensicke, Detlev Koester +4
We present the discovery of strongly variable emission lines from a gaseous disc around the DA white dwarf SDSS J1617+1620, a star previously found to have an infrared excess indic…
Interpreting the extended emission around three nearby debris disc host stars
Jonathan P. Marshall, F. Kirchschlager, S. Ertel +7
Cool debris discs are a relic of the planetesimal formation process around their host star, analogous to the solar system's Edgeworth-Kuiper belt. As such, they can be used as a pr…
HD139614: the interferometric case for a group-Ib pre-transitional young disk
Lucas Labadie, Alexis Matter, Alexander Kreplin +7
The Herbig Ae star HD 139614 is a group-Ib object, which featureless SED indicates disk flaring and a possible pre-transitional evolutionary stage. We present mid- and near-IR inte…
Heavy metals in a light white dwarf: Abundances of the metal-rich, extremely low-mass GALEX J1717+6757
J. J. Hermes, B. T. Gaensicke, D. Koester +9
Using the Hubble Space Telescope, we detail the first abundance analysis enabled by far-ultraviolet spectroscopy of a low-mass (~0.19 Msun) white dwarf (WD), GALEX J1717+6757, whic…