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Results from the Hipparcos Mission on Stellar Seismology

Published online by Cambridge University Press:  08 February 2017

L. Eyer  and
M. Grenon
L. Eyer
Affiliation:
Geneva Observatory, CH-1290 Sauverny, Switzerland
M. Grenon
Affiliation:
Geneva Observatory, CH-1290 Sauverny, Switzerland

Extract

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Photometric results from the HIPPARCOS mission are of interest to stellar seismology. HIPPARCOS provides a general description of the HR diagram in terms of stability, microvariability and variability. The satellite has detected systematically variables with amplitudes exceeding a threshold, strongly magnitude dependent but as small as a few mmag for bright stars. When the signal is periodic, periods and amplitudes are determined. Because of the peculiar time sampling of HIPPARCOS only first modes and associated amplitudes are generally obtained. This information is particularly relevant to seismology in the case of pulsating stars as δ Scuti stars, slowly pulsating B stars and β Cephei stars.

Type
V. Asteroseismology I
Information
Symposium - International Astronomical Union , Volume 185: New Eyes to See Inside the Sun and Stars , 1998 , pp. 291 - 294
Copyright
Copyright © Kluwer 1998 

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