Hostname: page-component-78c5997874-lj6df Total loading time: 0 Render date: 2024-11-04T21:04:33.648Z Has data issue: false hasContentIssue false
  • English
  • Français

Short Period Oscillations in Acturus, Aldebaran, and Pollux

Published online by Cambridge University Press:  19 July 2016

Peter H. Smith  and
Robert S. McMillan
Peter H. Smith
Affiliation:
Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721 USA
Robert S. McMillan
Affiliation:
Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721 USA

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

A total of 48 nights of time series data have been obtained for the K giants: Arcturus, Pollux, and Aldebaran. A careful analysis of both single and multi–night sets using the earth's motion as a velocity calibrator has yielded stellar velocity time series accurate to ± 3 m/s per observation. Periodogram analyses of these sets have revealed the existence of oscillations with periods near 2.5 hrs and amplitudes of ± 5 m/s for both Pollux and Aldebaran, but not for Arcturus. Preliminary analysis of a 5-night set for Pollux using the CLEAN algorithm suggests at least three modes separated by about 35 microHertz.

Type
IV. Spectroscopic Patterns of Stellar Atmospheres
Information
Symposium - International Astronomical Union , Volume 132: The Impact of Veryhigh S/N Spectroscopy on Stellar Physics , 1988 , pp. 291 - 294
Copyright
Copyright © Kluwer 1988 

References

Ando, H. 1976, Publ. Astron. Soc. Japan, 28, 517.Google Scholar
Christensen-Dalsgaard, J., and Frandsen, S. 1983, Solar Phys., 82, 469.Google Scholar
Horne, J. H., and Baliunas, S. L. 1986, Ap. J., 757.Google Scholar
McMillan, R. S. et al. 1986, Proc. S. P. I. E., 627, 2.Google Scholar
Noyes, R. W. et al. 1984, Ap. J., 285, L23.Google Scholar
Roberts, D. H. et al. 1987, A. J., 93, 968.Google Scholar
Serkowski, K. et al. 1979, Ap. J., 228, 630.Google Scholar
Smith, M. A. 1983, Ap. J., 265, 325.CrossRefGoogle Scholar
Smith, P. H., McMillan, R. S., and Merline, W. J. 1987, Ap. J., 317, L79.CrossRefGoogle Scholar