An approach to Eddington science using OMC integral data

Domínguez, R. M.; Régulo, C.; Roca-Cortés, T.
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In: Second Eddington Workshop: Stellar structure and habitable planet finding, 9 - 11 April 2003, Palermo, Italy. Edited by F. Favata, S. Aigrain and A. Wilson. ESA SP-538, Noordwijk: ESA Publications Division, ISBN 92-9092-848-4, 2004, p. 309 - 311

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The Eddington mission has two primary scientific goals: the study of stellar structure and evolution, and the search of habitable planets. The first one, based on asteroseismology techniques, is our interest. The goal here is to measure oscillations frequencies for as many modes as possible for a sample of stars whose masses, ages and chemical compositions are close to the Sun's. In this way we will also have a measure of the Sun's evolution. Among this sample we want also to include binary stars of large period so we can have an independent and precise measurement of radii and masses. For the moment, we have started to test whether data from the OMC (Optical Monitor Camera) on board INTEGRAL (International Gamma-ray Astrophysics Laboratory) are suitable for asteroseismology studies. Analysis of this data, in progress now, will be useful to develop methodology and software to be later used in the analysis of Eddington data. Preliminary results of this exploration will be presented, keeping in mind that this data will, obviously, only provide a glimpse of what can be obtained using Eddington.