236 citations · 905 across the 18 of their papers we have counts for
16 papers
Oscillations of red giant stars with magnetic damping in the core. II. Mixed mode visibilities on the red-giant branch
Jonas Müller, Saskia Hekker
Mode visibilities can be estimated from observed power spectra or from theory by making assumptions about the damping processes occurring in the star. However, a quantitative compa…
Facing the phase: Gravity-mode offset and buoyancy glitches in red--giant branch stars
T. van Lier, J. Müller, S. Hekker
With the increasing precision of asteroseismic observations, it becomes possible to reliably measure oscillation properties of an increasing number of stars. Interpreting these mea…
Hidden oscillations in plain sight: identification of seismically unresolved red-giant asteroseismic binary candidates
Jeong Yun Choi, Francisca Espinoza-Rojas, Saskia Hekker
Light curves of oscillating stars provide valuable insights into the stellar interiors. When oscillations from a pair of stars are captured within a single photometric aperture, th…
The sensitivity and behaviour of the curvature in the échelle diagram of red-giant stars
S. Hekker, Y. Elsworth, S. Basu +5
In the convective envelopes of relatively cool stars, oscillations are excited by turbulent convection. In these so-called solar-like oscillators, radial oscillation modes appear a…
Asymptotic power spectra and visibilities of damped mixed modes
Jonas Müller, Quentin Coppée, Jordan Van Beeck +2
Recent observational studies of red giant stars have estimated the visibility of their mixed oscillation modes, which is a proxy of the average energy of these modes. Among other t…
The Gaia-ESO Survey: properties of newly discovered Li-rich giants
R. Smiljanic, E. Franciosini, A. Bragaglia +41
We report 20 new lithium-rich giants discovered within the Gaia-ESO Survey, including the first Li-rich giant with evolutionary stage confirmed by CoRoT data. Atmospheric parameter…
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.…
CoRoT and Kepler results: Solar-like oscillators
S. Hekker
The space-borne observatories CoRoT (Convection Rotation and planetary Transits) and Kepler have provided photometric time series data of unprecedented precision for large numbers…
Modelling a high-mass red giant observed by CoRoT
F. Baudin, C. Barban, M. J. Goupil +15
The G6 giant HR\,2582 (HD\,50890) was observed by CoRoT for approximately 55 days. Mode frequencies are extracted from the observed Fourier spectrum of the light curve. Numerical s…
Seismic analysis of four solar-like stars observed during more than eight months by Kepler
S. Mathur, T. L. Campante, R. Handberg +41
Having started science operations in May 2009, the Kepler photometer has been able to provide exquisite data of solar-like stars. Five out of the 42 stars observed continuously dur…
The solar-like CoRoT target HD 170987: spectroscopic and seismic observations
S. Mathur, R. A. Garcia, C. Catala +22
The CoRoT mission is in its third year of observation and the data from the second long run in the galactic centre direction are being analysed. The solar-like oscillating stars th…
Red-giant seismic properties analyzed with CoRoT
B. Mosser, K. Belkacem, M. J. Goupil +10
The CoRoT 5-month long observation runs give us the opportunity to analyze a large variety of red-giant stars and to derive fundamental stellar parameters from their asteroseismic…
Line-profile variations of stochastically excited oscillations in four evolved stars
S. Hekker, C. Aerts
Since solar-like oscillations were first detected in red-giant stars, the presence of non-radial oscillation modes has been debated. Spectroscopic line-profile analysis was used in…
Non-radial oscillations in the red giant HR7349 measured by CoRoT
F. Carrier, J. De Ridder, F. Baudin +13
Convection in red giant stars excites resonant acoustic waves whose frequencies depend on the sound speed inside the star, which in turn depends on the properties of the stellar in…
Characteristics of solar-like oscillations in red giants observed in the CoRoT exoplanet field
S. Hekker, T. Kallinger, F. Baudin +6
Observations during the first long run (~150 days) in the exo-planet field of CoRoT increase the number of G-K giant stars for which solar-like oscillations are observed by a facto…
Precise radial velocities of giant stars. IV. A correlation between surface gravity and radial velocity variation and a statistical investigation of companion properties
S. Hekker, I. A. G. Snellen, C. Aerts +3
Since 1999, we have been conducting a radial velocity survey of 179 K giants using the CAT at UCO/Lick observatory. At present ~20-100 measurements have been collected per star wit…