A Search for Acoustic Oscillations on eta CAS with the Palomar 200'' Echelle Spectrograph

Details A Search for Acoustic Oscillations on eta CAS with the Palomar 200'' Echelle Spectrograph A Search for Acoustic Oscillations on eta CAS with the Palomar 200'' Echelle Spectrograph

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...18311108p&link_type=abstract

American Astronomical Society, 183rd AAS Meeting, #111.08; Bulletin of the American Astronomical Society, Vol. 25, p.1458

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We have begun a program to observe acoustic oscillations in solar-type stars. Timeseries of radial velocity variations in the stellar absorption lines are acquired using the high-resolution echelle spectrograph on the Palomar 200'' telescope. These measurements are Fourier transformed to search for periodicities which are the key signature of p-mode oscillations. Initial tests indicate that our technique is likely to provide sufficient sensitivity to measure the sub-m/s Doppler amplitudes predicted for the oscillations. Our first target star, eta Cas (G0 V, m_v=3.44), was observed during 6 nights in Aug-Sept 1993. We present results of those observations.

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