Hostname: page-component-848d4c4894-hfldf Total loading time: 0 Render date: 2024-05-15T04:51:04.671Z Has data issue: false hasContentIssue false
  • English
  • Français

High precision radial-velocity measurements of late-type evolved stars

Published online by Cambridge University Press:  12 April 2016

I.N. Cummings ,
J.B. Hearnshaw ,
P.M. Kilmartin  and
A.C. Gilmore
I.N. Cummings
Affiliation:
Mt John University Observatory, Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand
J.B. Hearnshaw
Affiliation:
Mt John University Observatory, Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand
P.M. Kilmartin
Affiliation:
Mt John University Observatory, Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand
A.C. Gilmore
Affiliation:
Mt John University Observatory, Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand

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.

High dispersion spectra for 44 southern evolved stars of spectral type K or M have been obtained. From these observations relative radial velocities of 50 m/s precision have been obtained by the method of digital cross-correlation. This method of achieving precise relative radial velocities for late-type stars, and the problems encountered in its use, are discussed. Using this method, statistically significant radial-velocity variations have been found. Two of the observed stars have their precise radial velocities presented and the potential mechanisms of their variation examined.

Type
Part 5. Variable Stars
Information
International Astronomical Union Colloquium , Volume 170: Precise Stellar Radial Velocities , 1999 , pp. 204 - 210
Copyright
Copyright © Astronomical Society of the Pacific 1999

References

Gray, D.F. & Toner, C.G. 1986, ApJ, 310, 277 CrossRefGoogle Scholar
Ostlie, D.A. & Cox, A.N. 1986, ApJ, 311, 864 CrossRefGoogle Scholar
Schaller, G. 1990, in Confrontations Between Stellar Pulsation and Evolution (ASP Conf. Ser., 11), Cacciari, C. & Clementini, G., San Francisco: Astron. Soc. Pacific, 300 Google Scholar
Walker, G.A.H., Yang, S., Campbell, B., & Irwin, A.W. 1989, ApJ, 343, L21 CrossRefGoogle Scholar