An upper limit on p-mode amplitudes in Beta HYI

Details An upper limit on p-mode amplitudes in Beta HYI An upper limit on p-mode amplitudes in Beta HYI

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...181..289f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 181, no. 2, July 1987, p. 289-292.

Astronomy and Astrophysics

Astrophysics

9

Astronomical Spectroscopy, Faint Objects, Spectrographs, Stellar Oscillations, Amplitudes, Emission Spectra, Energy Distribution, Maxima, Stellar Luminosity

Scientific paper

The present attempt to identify the presence of stellar oscillations in Beta Hyi employs the ESO Coude Echelle Spectrometer high-resolution spectrograph, which is fed by an optical-fiber device. The ratio R (the flux in the line cores divided by the flux in the continuum) is determined, as a scintillation-insensitive indicator of oscillations at a level higher than the oscillations in the total luminosity. Due to detector problems, however, only an upper limit was found for these amplitudes; this limit corresponds to a few times 0.00001 in the luminosity.

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