Confirmation of radial velocity variability in Arcturus

Details Confirmation of radial velocity variability in Arcturus Confirmation of radial velocity variability in Arcturus

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...334..349c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 334, Nov. 1, 1988, p. 349-356.

Astronomy and Astrophysics

Astrophysics

33

Astrometry, Radial Velocity, Stellar Motions, Velocity Measurement, Telluric Lines, Temporal Distribution, Velocity Distribution, Velocity Errors

Scientific paper

The author presents results of high-precision measurements of radial velocity variations in α Boo (Arcturus). Data were taken during eight nights in 1986 January - April and 1987 May with five minute time resolution and velocity precision of 15 - 20 m s-1. Significant radial velocity variability of α Boo is detected well in excess of the random and systematic measurement errors. The radial velocity varies by an amount greater than 200 m s-1 with a period around 2 days. This variation is seen both in the difference of mean velocities from night to night and in large systematic velocity changes during a single night.

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