High precision velocity measurements of Procyon using the 7699 A line of potassium

Details High precision velocity measurements of Procyon using the 7699 A line of potassium High precision velocity measurements of Procyon using the 7699 A line of potassium

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.286..583i&link_type=abstract

In ESA, Seismology of the Sun and Sun-Like Stars p 583-586 (SEE N89-25819 19-92)

Computer Science

Numerical Analysis

5

Stellar Magnetic Fields, Stellar Oscillations, Stellar Spectra, Velocity Measurement, Line Spectra, Numerical Analysis, Potassium

Scientific paper

The star Procyon (alpha CMi) was observed for 2 weeks using the Birmingham double magneto-optical filter spectrometer in 1988 January. Analysis of these velocity data shows that the noise level (per frequency channel of 1 microHz) in the power spectrum of the combined nightly runs is m sq/sec/sec. These data were searched for the presence of small scale oscillations, but none are obviously present. On one night the surface integrated magnetic field of Procyon was measured using a rotating quarter wave plate to select alternatively opposite senses of circularly polarized light. Analysis indicates that B is 1.3 + or - 4.0 Gauss (standard error), consistent with a nondetection at the few Gauss level.

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