Publications (14)
Accurate p-mode measurements of the G0V metal-rich CoRoT target HD 52265
J. Ballot, L. Gizon, R. Samadi +27
The star HD 52265 is a G0V metal-rich exoplanet-host star observed in the seismology field of the CoRoT space telescope from November 2008 to March 2009. The satellite collected 11…
Precise Modeling of the Exoplanet Host Star and CoRoT Main Target HD 52265
M. E. Escobar, S. Théado S. Vauclair, J. Ballot +8
This paper presents a detailed and precise study of the characteristics of the Exoplanet Host Star and CoRoT main target HD 52265, as derived from asteroseismic studies. The result…
The Spectral Variability of Pulsating Stars: PG1159-035
T. Stahn, S. Dreizler, K. Werner
With 10m class telescopes as well as with time-tagging detectors on board of HST and FUSE, the analysis of time-resolved spectra for pulsating white dwarfs becomes feasible. We pre…
Light curve analysis of the hybrid sdB pulsators HS0702+6043 and HS2201+2610
R. Lutz, S. Schuh, R. Silvotti +6
We present the detection of low-amplitude, long-period g-modes in two individual sdBV stars which are known to be p-mode pulsators. Only few of these hybrid objects, showing both p…
Kepler Observations of the Asteroseismic Binary HD 176465
T. R. White, O. Benomar, V. Silva Aguirre +31
Binary star systems are important for understanding stellar structure and evolution, and are especially useful when oscillations can be detected and analysed with asteroseismology.…
The planet-hosting subdwarf B star V391 Pegasi is a hybrid pulsator
R. Lutz, S. Schuh, R. Silvotti +4
A noticeable fraction of subdwarf B stars shows either short-period (p-mode) or long-period (g-mode) luminosity variations, with two objects so far known to exhibit hybrid behaviou…
Helioseismology of Sunspots: A Case Study of NOAA Region 9787
L. Gizon, H. Schunker, C. S. Baldner +12
Various methods of helioseismology are used to study the subsurface properties of the sunspot in NOAA Active Region 9787. This sunspot was chosen because it is axisymmetric, shows…
Seismic constraints on the radial dependence of the internal rotation profiles of six Kepler subgiants and young red giants
S. Deheuvels, G. DoÄan, M. J. Goupil +25
Context : We still do not know which mechanisms are responsible for the transport of angular momentum inside stars. The recent detection of mixed modes that contain the signature o…
Seismic evidence for a rapidly rotating core in a lower-giant-branch star observed with Kepler
S. Deheuvels, R. A. Garcia, W. J. Chaplin +24
Rotation is expected to have an important influence on the structure and the evolution of stars. However, the mechanisms of angular momentum transport in stars remain theoretically…
Seismic analysis of HD43587Aa, a solar-like oscillator in a multiple system
P. Boumier, O. Benomar, F. Baudin +26
Context. The object HD 43587Aa is a G0V star observed during the 145-day LRa03 run of the COnvection, ROtation and planetary Transits space mission (CoRoT), for which complementary…
Exciting new features in the frequency spectrum of the EC14026 star HS0702+6043 - Simultaneous g-modes and p-modes in a sdB pulsator
S. Schuh, J. Huber, S. Dreizler +7
The discovery of a long-period g-mode oscillation in the previously known short-period p-mode sdB pulsator HS0702+6043 makes this star an extraordinary object, unique as a member o…
Asteroseismology of the solar analogs 16 Cyg A & B from Kepler observations
T. S. Metcalfe, W. J. Chaplin, T. Appourchaux +34
The evolved solar-type stars 16 Cyg A & B have long been studied as solar analogs, yielding a glimpse into the future of our own Sun. The orbital period of the binary system is too…
SDSSJ212531.92-010745.9 - the first definite PG1159 close binary system
T. Nagel, S. Schuh, D. -J. Kusterer +5
The archival spectrum of SDSSJ212531.92-010745.9 shows not only the typical signature of a PG1159 star, but also indicates the presence of a companion. Our aim was the proof of the…
Multi-wavelength photometric variation of PG1605+072
S. Schuh, S. Dreizler, U. Heber +8
In a large coordinated attempt to further our understanding of the -mode pulsating sdB star PG1605+072, the Multi-Site Spectroscopic Telescope (MSST) collaboration has obtained…