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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Solar FLAG here and hounds: On the extraction of rotational p-mode splittings from seismic, Sun-as-a-star data
Monthly Notices of the Royal Astronomical Society, Volume 369, No. 2, Year 2006
Notification
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Description
We report on results from the first solar Fitting at Low-Angular degree Group (solar FLAG) hare-and-hounds exercise. The group is concerned with the development of methods for extracting the parameters of low-l solar p-mode data ('peak bagging'), collected by Sun-as-a-star observations. Accurate and precise estimation of the fundamental parameters of the p modes is a vital pre-requisite of all subsequent studies. Nine members of the FLAG (the 'hounds') fitted an artificial 3456-d data set. The data set was made by the 'hare' (WJC) to simulate full-disc Doppler velocity observations of the Sun. The rotational frequency splittings of the l = 1, 2 and 3 modes were the first parameter estimates chosen for scrutiny. Significant differences were uncovered at l = 2 and 3 between the fitted splittings of the hounds. Evidence is presented that suggests this unwanted bias had its origins in several effects. The most important came from the different way in which the hounds modelled the visibility ratio of the different rotationally split components. Our results suggest that accurate modelling of the ratios is vital to avoid the introduction of significant bias in the estimated splittings. This is of importance not only for studies of the Sun, but also of the solar analogues that will be targets for asteroseismic campaigns. © 2006 RAS.
Authors & Co-Authors
Chaplin, W. J.
United Kingdom, Birmingham
University of Birmingham
Appourchaux, T.
France, Orsay
Institut D'astrophysique Spatiale
France, Gif-sur-yvette
Université Paris-saclay
Baudin, F.
France, Orsay
Institut D'astrophysique Spatiale
France, Gif-sur-yvette
Université Paris-saclay
Boumier, Patrick
France, Orsay
Institut D'astrophysique Spatiale
France, Gif-sur-yvette
Université Paris-saclay
Elsworth, Y.
United Kingdom, Birmingham
University of Birmingham
Fletcher, S. T.
United Kingdom, Birmingham
University of Birmingham
Fossat, Eric G.
France, Nice
Laboratoire Joseph-louis Lagrange
García, R. A.
France, Gif-sur-yvette
Astrophysique, Instrumentation et Modélisation de Paris-saclay
Isaak, G. R.
United Kingdom, Birmingham
University of Birmingham
Jiménez, A.
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Jiménez-Reyes, S. J.
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Lazrek, Mohamed
France, Nice
Laboratoire Joseph-louis Lagrange
Morocco, Marakech
Faculté Des Sciences Semlalia
France, Nice
Observatoire de la Côte D'azur
Leibacher, J. W.
United States, Tucson
National Solar Observatory
Lochard, J.
France, Orsay
Institut D'astrophysique Spatiale
France, Gif-sur-yvette
Université Paris-saclay
New, R.
United Kingdom, Sheffield
Sheffield Hallam University
Pallé, Pere Lluis
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Régulo, Clara
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Spain, San Cristobal de la Laguna
Universidad de la Laguna
Salabert, David
United States, Boulder
The Earth and Sun Systems Laboratory
Seghouani, Nassim
Algeria, Algiers
Centre de Recherche en Astronomie Astrophysique et Géophysique
Toutain, T.
United Kingdom, Birmingham
University of Birmingham
France, Nice
Observatoire de la Côte D'azur
Norway, Oslo
Universitetet I Oslo
Wachter, R.
United States, Palo Alto
Stanford University
Statistics
Citations: 32
Authors: 21
Affiliations: 15
Identifiers
Doi:
10.1111/j.1365-2966.2006.10358.x
ISSN:
00358711
e-ISSN:
13652966