4.1k citations · 23k across the 157 of their papers we have counts for
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On the opacity change required to compensate for the revised solar composition
Jørgen Christensen-Dalsgaard, Maria Pia Di Mauro, Günter Houdek +1
Recent revisions of the determination of the solar composition have resulted in solar models in marked disagreement with helioseismic inferences. The effect of the composition chan…
AsteroFLAG: first results from hare-and-hounds Exercise 1
W. J. Chaplin, T. Appourchaux, T. Arentoft +15
We report on initial results from the first phase of Exercise 1 of the asteroFLAG hare and hounds. The asteroFLAG group is helping to prepare for the asteroseismology component of…
CoRoT/ESTA-TASK 1 and TASK 3 comparison of the internal structure and seismic properties of representative stellar models: Comparisons between the ASTEC, CESAM, CLES, GARSTEC and STAROX codes
Yveline Lebreton, Josefina Montalban, Joergen Christensen-Dalsgaard +2
We compare stellar models produced by different stellar evolution codes for the CoRoT/ESTA project, comparing their global quantities, their physical structure, and their oscillati…
Inter-comparison of the g-, f- and p-modes calculated using different oscillation codes for a given stellar model
A. Moya, J. Christensen-Dalsgaard, S. Charpinet +9
In order to make astroseismology a powerful tool to explore stellar interiors, different numerical codes should give the same oscillation frequencies for the same input physics. Th…
ASTEC -- the Aarhus STellar Evolution Code
J. Christensen-Dalsgaard
The Aarhus code is the result of a long development, starting in 1974, and still ongoing. A novel feature is the integration of the computation of adiabatic oscillations for specif…
ADIPLS -- the Aarhus adiabatic oscillation package
J. Christensen-Dalsgaard
Development of the Aarhus adiabatic pulsation code started around 1978. Although the main features have been stable for more than a decade, development of the code is continuing, c…
Asteroseismology and Interferometry
M. S. Cunha, C. Aerts, J. Christensen-Dalsgaard +22
Asteroseismology provides us with a unique opportunity to improve our understanding of stellar structure and evolution. Recent developments, including the first systematic studies…
A spectroscopic search for non-radial pulsations in the delta Scuti star gamma Bootis
R. Ventura, G. Catanzaro, J. Christensen-Dalsgaard +2
High-resolution spectroscopic observations of the rapidly rotating delta Scuti star gamma Bootis have been carried out on 2005, over 6 consecutive nights, in order to search for li…
Stellar Oscillations Network Group
F. Grundahl, H. Kjeldsen, J. Christensen-Dalsgaard +2
Stellar Oscillations Network Group (SONG) is an initiative aimed at designing and building a network of 1m-class telescopes dedicated to asteroseismology and planet hunting. SONG w…
Microscopic Diffusion in Stellar Evolution Codes: First Comparison results of ESTA-Task~3
Y. Lebreton, J. Montalban, J. Christensen-Dalsgaard +8
We present recent work undertaken by the Evolution and Seismic Tools Activity (ESTA) team of the CoRoT Seismology Working Group. The new ESTA-Task 3 aims at testing, comparing and…
Asteroseismology with the Kepler mission
J. Christensen-Dalsgaard, T. Arentoft, T. M. Brown +4
NASA's Kepler mission will fly a photometer based on a wide-field Schmidt camera with a 0.95 m aperture, staring at a single field continuously for at least 4 years. Although the m…
Rotation of the solar convection zone from helioseismology
J. Christensen-Dalsgaard
Helioseismology has provided very detailed inferences about rotation of the solar interior. Within the convection zone the rotation rate roughly shares the latitudinal variation se…
Prospects for helio- and asteroseismology
J. Christensen-Dalsgaard
Major progress has been made in helio- and asteroseismology in recent years. In helioseismology, much of the activity has been in local helioseismology. However, the recent revisio…
Report on the CoRoT Evolution and Seismic Tools Activity
M. K. J. P. F. G. Monteiro, Y. Lebreton, J. Montalban +24
We present the work undertaken by the Evolution and Seismic Tools Activity (ESTA) team of the CoRoT Seismology Working Group. We have focused on two main tasks: Task 1 - now finish…
Probing the internal magnetic field of slowly pulsating B-stars through g modes
S. S. Hasan, J. -P. Zahn, J. Christensen-Dalsgaard
We suggest that high-order g modes can be used as a probe of the internal magnetic field of SPB (slowly pulsating B) stars. The idea is based on earlier work by the authors which a…
The magnetism of the solar interior for a complete MHD solar vision
S. Turck-Chieze, T. Appourchaux, J. Ballot +37
The solar magnetism is no more considered as a purely superficial phenomenon. The SoHO community has shown that the length of the solar cycle depends on the transition region betwe…
Solar-like oscillations in alpha Centauri B
Hans Kjeldsen, Timothy R. Bedding, R. Paul Butler +6
We have made velocity observations of the star alpha Cen B from two sites, allowing us to identify 37 oscillation modes with l=0-3. Fitting to these modes gives the large and small…
The non-detection of oscillations in Procyon by MOST: is it really a surprise?
T. R. Bedding, H. Kjeldsen, F. Bouchy +8
We argue that the non-detection of oscillations in Procyon by the MOST satellite reported by Matthews et al. (2004) is fully consistent with published ground-based velocity observa…
Asteroseismology of Sun-like Stars - A Proposal
T. S. Metcalfe, T. M. Brown, J. Christensen-Dalsgaard
In the past decade, helioseismology has revolutionized our understanding of the interior structure of the Sun. In the next decade, asteroseismology will place this knowledge into c…
Rotation of the solar interior
J. Christensen-Dalsgaard, M. J. Thompson
Helioseismology has allowed us to infer the rotation in the greater part of the solar interior with high precision and resolution. The results show interesting conflicts with earli…
SOLA inversions for the core structure of solar-type stars
Sarbani Basu, J. Christensen-Dalsgaard, M. J. Thompson
The Subtractive Optimally Localized Averages (SOLA) method, developed and extensively used in helioseismology, is applied to artificial data to obtain measures of the sound speed i…
Asteroseismic Inference for Solar-Type Stars
M. J. P. F. G. Monteiro, J. Christensen-Dalsgaard, M. J. Thompson
The oscillation spectra of solar-type stars may in the not-too- distant future be used to constrain certain properties of the stars. The CD diagram of large versus small frequency…
SX Phoenicis Stars in the Core of 47 Tucanae
H. Bruntt, S. Frandsen, R. L. Gilliland +5
We present new results on five of six known SX Phoenicis stars in the core of the globular cluster 47 Tucanae. We give interpretations of the light curves in the V and I bands from…
The Effect of Diffusion on Pulsations of Stars on the Upper Main Sequence. delta Scuti and Metallic A Stars
S. Turcotte, J. Richer, G. Michaud +1
Recent dramatic improvements in the modeling of abundance evolution due to diffusion in A stars have been achieved with the help of monochromatic opacity tables from the OPAL group…