142 citations · 754 across the 18 of their papers we have counts for
18 papers
The optical high-resolution spectral archive of the HERMES spectrograph mounted on the 1.2m Mercator telescope
Hans Van Winckel, Saskia Prins, Gert Raskin +13
Context. The HERMES spectrograph is a high-resolution, fibre-fed optical spectrograph of the 1.2m Mercator telescope operated from the Roque de los Muchachos observatory in Spain.…
Detection of Solar-Like Oscillations, Observational Constraints, and Stellar Models for Cyg, the Brightest Star Observed by the {\it Kepler} Mission
J. A. Guzik, G. Houdek, W. J. Chaplin +52
Cygni is an F3 spectral-type main-sequence star with visual magnitude V=4.48. This star was the brightest star observed by the original Kepler spacecraft mission. Short-cadence…
KIC 7177553: a quadruple system of two close binaries
H. Lehmann, T. Borkovits, S. A. Rappaport +4
KIC 7177553 was observed by the Kepler satellite to be an eclipsing eccentric binary star system with an 18-day orbital period. Recently, an eclipse timing study of the Kepler bina…
KIC 4768731: a bright long-period roAp star in the Kepler Field
B. Smalley, E. Niemczura, S. J. Murphy +11
We report the identification of 61.45 d^-1 (711.2 mu Hz) oscillations, with amplitudes of 62.6-mu mag, in KIC 4768731 (HD 225914) using Kepler photometry. This relatively bright (V…
KIC 3858884: a hybrid δ Sct pulsator in a highly eccentric eclipsing binary
C. Maceroni, H. Lehmann, R. da Silva +10
The analysis of eclipsing binaries containing non-radial pulsators allows: i) to combine two different and independent sources of information on the internal structure and evolutio…
A search for pulsations in the HgMn star HD 45975 with CoRoT photometry and ground-based spectroscopy
T. Morel, M. Briquet, M. Auvergne +28
The existence of pulsations in HgMn stars is still being debated. To provide the first unambiguous observational detection of pulsations in this class of chemically peculiar object…
Modelling the asymmetric wind of the luminous blue variable binary MWC 314
A. Lobel, J. H. Groh, C. Martayan +12
We present a spectroscopic analysis of MWC 314, a luminous blue variable (LBV) candidate with an extended bipolar nebula. The detailed spectroscopic variability is investigated to…
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…
HD 181068: A Red Giant in a Triply-Eclipsing Compact Hierarchical Triple System
A. Derekas, L. L. Kiss, T. Borkovits +41
Hierarchical triple systems comprise a close binary and a more distant component. They are important for testing theories of star formation and of stellar evolution in the presence…
Modeling the Asymmetric Wind of Massive LBV Binary MWC 314
A. Lobel, J. Groh, K. Torres Dozinel +13
Spectroscopic monitoring with Mercator-HERMES over the past two years reveals that MWC 314 is a massive binary system composed of an early B-type primary LBV star and a less-lumino…
Kepler observations of variability in B-type stars
L. A. Balona, A. Pigulski, P. De Cat +27
The analysis of the light curves of 48 B-type stars observed by Kepler is presented. Among these are 15 pulsating stars, all of which show low frequencies characteristic of SPB sta…
UX Monocerotis as a W Serpentis binary
D. Sudar, P. Harmanec, H. Lehmann +3
Using our new photometric and spectroscopic observations as well as all available published data, we present a new interpretation of the properties of the peculiar emission-line bi…
Kepler photometry of KIC 10661783: a binary star with total eclipses and delta Scuti pulsations
John Southworth, W. Zima, C. Aerts +14
We present Kepler satellite photometry of KIC 10661783, a short-period binary star system which shows total eclipses and multi-periodic delta Scuti pulsations. A frequency analysis…
HERMES high-resolution spectroscopy of HD 149382. Where did the planet go?
V. A. Jacobs, R. H. Østensen, H. Van Winckel +12
A close substellar companion has been claimed to orbit the bright sdB star HD 149382 with a period of 2.391d. In order to check this important discovery we gathered 26 high resolut…
Cepheid investigations using the Kepler space telescope
R. Szabó, L. Szabados, C. -C. Ngeow +35
We report results of initial work done on selected candidate Cepheids to be observed with the Kepler space telescope. Prior to the launch 40 candidates were selected from previous…
Determination of the inclination of the multi-planet hosting star HR8799 using asteroseismology
Duncan Wright, André-Nicolas Chené, Peter De Cat +6
Direct imaging of the HR8799 system was a major achievement in the study of exoplanets. HR8799 is a \,Doradus variable and asteroseismology can provide an independent constraint…
Spectral analysis of Kepler SPB and Beta Cep candidate stars
H. Lehmann, A. Tkachenko, T. Semaan +6
We determine the fundamental parameters of SPB and Beta Cep candidate stars observed by the Kepler satellite mission and estimate the expected types of non-radial pulsators by comp…
Ground-based observations of Kepler asteroseismic targets
K. Uytterhoeven, R. Szabo, J. Southworth +42
We present the ground-based activities within the different working groups of the Kepler Asteroseismic Science Consortium (KASC). The activities aim at the systematic characterizat…