Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...413..339h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 413, no. 1, p. 339-348.
Astronomy and Astrophysics
Astrophysics
92
Giant Stars, K Stars, Radial Velocity, Stellar Motions, Velocity Measurement, Long Term Effects, Stellar Oscillations, Stellar Spectra
Scientific paper
Precise relative radial velocities were measured for three K giants Alpha Tau, Alpha Boo, and Beta Gem to detect planetary companions. Results reveal strong evidence for long term periodic behavior in the radial velocities: 233 days for Alpha Boo, 643 days for Alpha Tau, and 558 days for Beta Gem. These periods are considered to be too long to be due to radial pulsations. The fact that all three stars exhibit similar periods and give comparable companion masses suggests that the variability is intrinsic to the star (either rotational modulation or pulsations).
Cochran William D.
Hatzes Artie P.
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