Global acoustic oscillations on Alpha Bootis

Bibcode
1990ApJ...358..595B
DOI
10.1086/169012
Belmonte, Juan A.; Jones, Andrew R.; Palle, Pere L.; Roca-Cortés, T.
Bibliographical reference

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 358, Aug. 1, 1990, p. 595-609. Research supported by DGICYT.

Advertised on:
8
1990
Journal
Astrophysical Journal
Number of authors
4
IAC number of authors
4
Citations
37
Refereed citations
27
Description
A two-week time series of precise radial velocity measurements of Alpha Bootis (Arcturus) covering 7-8 hr per night is reported. The radial barycentric velocity of the star is found to be -5021 + or - 5 m/s. When data from the whole run are jointly analyzed, several equispaced peaks in the frequency appear in the range of a few microhertz, the highest amplitude being some 60 m/s at 4.3 microhertz. The most probable frequency spacing seems to be 50 microhertz, while the frequency cutoff is around 80 microhertz.
Type
Refereed
Giant stars
Radial velocity
Stellar oscillations

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