Computer Science – Performance
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.249..643i&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 249, April 15, 1991, p. 643-653.
Computer Science
Performance
23
Power Spectra, Radial Velocity, Stellar Oscillations, Astronomical Spectroscopy, Helioseismology, Stellar Interiors
Scientific paper
An analysis for the presence of small, low-degree p-mode oscillations of high-precision velocity observations of Procyon is presented. Examination of solar data taken during the Procyon observing runs at higher counting rates yields correspondingly lower noise levels, indicating that the spectrometer performance is, as yet, essentially limited by photon statistics. The power spectra are also studied for possible periodicities due to the presence of equifrequency spaced modes of comparable power to the background noise. It is observed that while some periodicities were seen they were not reproducible in all three data sets, and therefore are probably not of stellar origin.
Brazier R. I.
Innis John L.
Isaak George R.
Speake Clive C.
Williams Kenneth H.
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