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- Centre National de la Recherche ScientifiqueFR225 papers
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15 papers · 2 filters
Magnetic White Dwarf Stars in the Sloan Digital Sky Survey
S. O. Kepler, Ingrid Pelisoli, Stefan Jordan +10
To obtain a better statistics on the occurrence of magnetism among white dwarfs, we searched the spectra of the hydrogen atmosphere white dwarf stars (DAs) in the Data Release 7 of…
Tracing large-scale structures in circumstellar disks with ALMA
Jan Philipp Ruge, Sebastian Wolf, Ana L. Uribe +1
Planets are supposed to form in circumstellar disks. The gravitational potential of a planet perturbs the disk and leads to characteristic structures, i.e. spiral waves and gaps, i…
SDSS DR7 White Dwarf Catalog
S. J. Kleinman, S. O. Kepler, D. Koester +13
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…
Spectroscopic Observations of Propagating Disturbances in a Polar Coronal Hole: Evidence of Slow Magneto-acoustic Waves
G. R. Gupta, L. Teriaca, E. Marsch +2
We focus on detecting and studying quasi-periodic propagating features that have been interpreted both in terms of slow magneto-acoustic waves and of high speed upflows. We analyze…
Disks, accretion and outflows of brown dwarfs
V. Joergens, G. Herczeg, Y. Liu +13
Characterization of the properties of young brown dwarfs are important to constraining the formation of objects at the extreme low-mass end of the IMF. While young brown dwarfs sha…
The large longitudinal spread of solar energetic particles during the January 17, 2010 solar event
Nina Dresing, Raúl Gómez-Herrero, Andreas Klassen +3
We investigate multi-spacecraft observations of the January 17, 2010 solar energetic particle event. Energetic electrons and protons have been observed over a remarkable large long…