No CrossRef data available.
Article contents
Radial-velocity Variations of Late-type Variables
Published online by Cambridge University Press: 12 April 2016
Abstract
Low-amplitude, radial-velocity variations of bright late-type stars were monitored at the 1.2-m telescope of the Dominion Astrophysical Observatory (DAO) with the hydrogen fluoride (HF) absorption-cell technique. Many of the stars appear to be semi-regular red variables (SRb and SRc) and irregular red variables (Lb). The radial-velocity amplitudes range from a few tens of meters per second to a few kilometers per second while the timescales of the variations appear to range from a few tens of days to a few hundreds of days. These irregular-looking velocities are analysed for multiperiodicities. There are also variations in the chromospheric Ca II 8662 index for a few of the variables.
- Type
- Part 5. Variable Stars
- Information
- International Astronomical Union Colloquium , Volume 170: Precise Stellar Radial Velocities , 1999 , pp. 228 - 232
- Copyright
- Copyright © Astronomical Society of the Pacific 1999