Author

F. -R. Lachapelle

results may include different authors with the same name

3 papers

WD 1202-024: The Shortest-Period Pre-Cataclysmic Variable

Among the 28,000 targeted stars in K2 Field 10 is the white dwarf WD 1202-024 (EPIC 201283111), first noted in the SDSS survey (SDSS 120515.80-024222.7). We have found that this hot white dwarf (Teff = 22,640 K) is in a very close orbit (P…

Solar and Stellar Astrophysics · Physics 2017-08-16 S. Rappaport , A. Vanderburg , L. Nelson , B. L. Gary , T. G. Kaye , B. Kalomeni , S. B. Howell , J. R. Thorstensen , F. -R. Lachapelle , M. Lundy , J. St-Antoine

SDSS DR7 White Dwarf Catalog

We present a new catalog of spectroscopically-confirmed white dwarf stars from the Sloan Digital Sky Survey Data Release 7 spectroscopic catalog. We find 20,407 white dwarf spectra, representing 19,712 stars, and provide atmospheric model…

Solar and Stellar Astrophysics · Physics 2015-06-12 S. J. Kleinman , S. O. Kepler , D. Koester , Ingrid Pelisoli , Viviane Peçanha , A. Nitta , J. E. S. Costa , J. Krzesinski , P. Dufour , F. -R. Lachapelle , P. Bergeron , Ching-Wa Yip , Hugh C. Harris , Daniel J. Eisenstein , L. Althaus , A. Córsico

The Discovery of the Most Metal-Rich White Dwarf: Composition of a Tidally Disrupted Extrasolar Dwarf Planet

Cool white dwarf stars are usually found to have an outer atmosphere that is practically pure in hydrogen or helium. However, a small fraction have traces of heavy elements that must originate from the accretion of extrinsic material, most…

Solar and Stellar Astrophysics · Physics 2015-05-19 P. Dufour , M. Kilic , G. Fontaine , P. Bergeron , F. -R. Lachapelle , S. J. Kleinman , S. K. Leggett