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High-precision CoRoT space photometry and fundamental parameter determination of the B2.5V star HD 48977
Anne Thoul, Pieter Degroote, Claude Catala +10
We present the CoRoT light curve of the bright B2.5V star HD 48977 observed during a short run of the mission in 2008, as well as a high-resolution spectrum gathered with the HERME…
Multisite spectroscopic seismic study of the beta Cep star V2052 Oph: inhibition of mixing by its magnetic field
M. Briquet, C. Neiner, C. Aerts +29
We used extensive ground-based multisite and archival spectroscopy to derive observational constraints for a seismic modelling of the magnetic beta Cep star V2052 Ophiuchi. The lin…
KIC 1718290: A Helium-rich V1093-Her-like Pulsator on the Blue Horizontal Branch
Roy H. Østensen, Pieter Degroote, John H. Telting +6
We introduce the first g-mode pulsator found to reside on the classical blue horizontal branch. One year of Kepler observations of KIC 1718290 reveals a rich spectrum of low-amplit…
A multisite photometric study of two unusual Beta Cep stars: the magnetic V2052 Oph and the massive rapid rotator V986 Oph
G. Handler, R. R. Shobbrook, K. Uytterhoeven +15
We report a multisite photometric campaign for the Beta Cep stars V2052 Oph and V986 Oph. 670 hours of high-quality differential photoelectric Stromgren, Johnson and Geneva time-se…
The CoRoT B-type binary HD50230: a prototypical hybrid pulsator with g-mode period and p-mode frequency spacings
P. Degroote, C. Aerts, E. Michel +14
B-type stars are promising targets for asteroseismic modelling, since their frequency spectrum is relatively simple. We deduce and summarise observational constraints for the hybri…
The spectroscopic observations of CoRoT asteroseismic targets with HARPS
Ennio Poretti, Monica Rainer, Luciano Mantegazza +6
CoRoT photometric measurements of asteroseismic targets need complementary ground-based spectroscopic observations. We are using the planet-hunter HARPS spectrograph attached to th…