Publications (22)
Photometric multi-site campaign on the open cluster NGC 884 I. Detection of the variable stars
S. Saesen, F. Carrier, A. Pigulski +62
CONTEXT: Recent progress in the seismic interpretation of field beta Cep stars has resulted in improvements of the physics in the stellar structure and evolution models of massive…
A new method for the spectroscopic identification of stellar non-radial pulsation modes. II. Mode identification of the Delta Scuti star FG Virginis
W. Zima, D. Wright, J. Bentley +7
We present a mode identification based on new high-resolution time-series spectra of the non-radially pulsating Delta Scuti star FG~Vir (HD 106384, V = 6.57, A5V). From 2002 Februa…
The tip of the iceberg: the frequency content of the Delta Sct star HD 50844 from CoRoT space photometry
E. Poretti, L. Mantegazza, M. Rainer +19
It has been suggested that the detection of a wealth of very low amplitude modes in Delta Sct stars was only a matter of signal--to--noise ratio. Access to this treasure, impossibl…
Towards ensemble asteroseismology of the young open clusters Chi Persei and NGC 6910
S. Saesen, A. Pigulski, F. Carrier +71
As a result of the variability survey in Chi Persei and NGC6910, the number of Beta Cep stars that are members of these two open clusters is increased to twenty stars, nine in NGC6…
Discovery of non-radial pulsations in the spectroscopic binary Herbig Ae star RS Cha
T. Böhm, W. Zima, C. Catala +3
In this article we present a first discovery of non radial pulsations in both components of the Herbig Ae spectroscopic binary star RS Cha. The binary was monitored in quasi-contin…
The PLATO Simulator: modelling of high-precision high-cadence space-based imaging
P. Marcos-Arenal, W. Zima, J. De Ridder +8
Many aspects of the design trade-off of a space-based instrument and its performance can best be tackled through simulations of the expected observations. The complex interplay of…
A new method for the spectroscopic identification of stellar non-radial pulsation modes. I. The method and numerical tests
W. Zima
We present the Fourier parameter fit method, a new method for spectroscopically identifying stellar radial and non-radial pulsation modes based on the high-resolution time-series s…
Close-up of primary and secondary asteroseismic CoRoT targets and the ground-based follow-up observations
K. Uytterhoeven, E. Poretti, M. Rainer +13
To optimise the science results of the asteroseismic part of the CoRoT satellite mission a complementary simultaneous ground-based observational campaign is organised for selected…
High-Precision Spectroscopy of Pulsating Stars
C. Aerts, S. Hekker, M. Desmet +4
We review methodologies currently available to interprete time series of high-resolution high-S/N spectroscopic data of pulsating stars in terms of the kind of (non-radial) modes t…
HD 50844: the new look of Delta Sct stars from CoRoT space photometry
E. Poretti, E. Michel, R. Garrido +21
It has also been suggested that the detection of a wealth of very low amplitude modes in Delta Sct stars was only a matter of signal--to--noise ratio. Access to this treasure, impo…
The Spitzer Spectroscopic Survey of S-type Stars
K. Smolders, P. Neyskens, J. A. D. L. Blommaert +28
S-type AGB stars are thought to be in the transitional phase between M-type and C-type AGB stars. Because of their peculiar chemical composition, one may expect a strong influence…
Close binary stars in the solar-age Galactic open cluster M67
K. Yakut, W. Zima, B. Kalomeni +12
We present multi-colour time-series CCD photometry of the solar-age galactic open cluster M67 (NGC 2682). About 3600 frames spread over 28 nights were obtained with the 1.5 m Russi…
The PLATO End-to-End CCD Simulator -- Modelling space-based ultra-high precision CCD photometry for the assessment study of the PLATO Mission
W. Zima, T. Arentoft, J. De Ridder +4
The PLATO satellite mission project is a next generation ESA Cosmic Vision satellite project dedicated to the detection of exo-planets and to asteroseismology of their host-stars u…
Various applications of multicolour photometry and radial velocity data for multimode Scuti stars
J. Daszynska-Daszkiewicz, W. A. Dziembowski, A. A. Pamyatnykh +2
In addition to revealing spherical harmonic degrees, , of excited modes, pulsational amplitudes and phases from multicolour photometry and radial velocity data yield a valuab…
Gravito-inertial and pressure modes detected in the B3 IV CoRoT target HD 43317
P. I. Pápics, M. Briquet, A. Baglin +14
Context. OB stars are important building blocks of the Universe, but we have only a limited sample of them well understood enough from an asteroseismological point of view to provi…
The ASTROID Simulator Software Package: Realistic Modelling of High-Precision High-Cadence Space-Based Imaging
P. Marcos-Arenal, W. Zima, J. De Ridder +2
The preparation of a space-mission that carries out any kind of imaging to detect high-precision low-amplitude variability of its targets requires a robust model for the expected p…
Pulsation of the Delta Scuti star Theta2 Tau: New multisite photometry and modelling of instability
M. Breger, A. A. Pamyatnykh, W. Zima +3
The results of a multisite photometric campaign of Theta2 Tau are reported. This binary system consists of evolved and main-sequence A stars inside the instability strip. The 12th…
An asteroseismic study of the beta Cephei star 12 Lacertae: multisite spectroscopic observations, mode identification and seismic modelling
M. Desmet, M. Briquet, A. Thoul +14
We present the results of a spectroscopic multisite campaign for the beta Cephei star 12 (DD) Lacertae. Our study is based on more than thousand high-resolution high S/N spectra ga…
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…
Inferences from pulsational amplitudes and phases for multimode Sct star FG Vir
J. Daszynska-Daszkiewicz, W. A. Dziembowski, A. A. Pamyatnykh +3
We combine photometric and spectroscopic data on twelve modes excited in FG Vir to determine their spherical harmonic degrees, , and to obtain constraints on the star model.…
A 3-D study of the photosphere of HD99563: I. Pulsation analysis
L. M. Freyhammer, D. W. Kurtz, V. G. Elkin +5
We have used high-speed spectroscopy of the rapidly oscillating Ap (roAp) star HD99563 to study the pulsation amplitude and phase behaviour of elements in its stratified atmosphere…
The Delta Scuti star FG Vir. V. The 2002 photometric multisite campaign
M. Breger, F. Rodler, M. L. Pretorius +15
A high-accuracy multisite campaign was carried out from 2002 January to May with a photometric coverage of 398 hours at five observatories. The concentration on a few selected site…