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Results of Spectrograph EMILIE with the AAA System on Solar-Like Oscillations

Published online by Cambridge University Press:  12 April 2016

F. Bouchy ,
J. Schmitt ,
J.-L. Bertaux  and
P. Connes
F. Bouchy
Affiliation:
Geneva Observatory, 1290 Sauverny, Switzerland
J. Schmitt
Affiliation:
Observatoire de Haute Provence, 04780 St Michel l’Observatoire, France
J.-L. Bertaux
Affiliation:
Service d’Aéronomie du CNRS, 91371 Verrières de Buisson, France
P. Connes
Affiliation:
Service d’Aéronomie du CNRS, 91371 Verrières de Buisson, France

Extract

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The spectrograph EMILIE (Bouchy et al., 1999; Bouchy, 1999; Bouchy et al., 2000) coupled to the Absolute Astronomical Accelerometer (AAA, Connes, 1985; Schmitt, 1997) and implemented at the 152-cm Coudé telescope of the Observatoire de Haute Provence is dedicated to high-precision Doppler measurements. The AAA method uses a sliding reference spectrum constrained to track the stellar lines and to use the spectrograph as a null-checking device. The goal of AAA is to eliminate the calibration of the spectrograph as well as the displacement of the spectra across the CCD pixels due to the earth motion (and suspected to introduce a systematic error in the RV measurement). Here we report seismological results obtained with AAA on the Sun and the bright stars Procyon and ζ Her A that are expected to present solar-like oscillations.

Type
Part 4. The Interaction between Convection and Pulsation
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 472 - 473
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

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