The sun as a star - On wavelength stability

Details The sun as a star - On wavelength stability The sun as a star - On wavelength stability

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...327..399w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 327, April 1, 1988, p. 399-404.

Astronomy and Astrophysics

Astrophysics

11

Frequency Stability, Solar Activity, Solar Spectra, Wavelengths, Carbon, Doppler Effect, Line Spectra, Oxygen, Planetary Systems, Solar Cycles

Scientific paper

Evidence for wavelength shifts as a function of the activity cycle in the sun is searched for. An indirect method for solar line measurement, involving the comparison of wavelengths at solar lines which have a large convective blueshift relative to solar lines which are relatively insensitive to blueshift, is shown to yield an upper limit of 5 m/s over the 1976-1986 period. Line asymmetry measurements indicative of surface convection demonstrate a trend of 7 m/s over the 1980-1986 period. The results suggest that intrinsic solar variability would not be an obstacle to planetary detection using precision radial velocity data for solar-type stars.

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