Hostname: page-component-7b7567c8c-lpg2g Total loading time: 0 Render date: 2026-11-15T18:01:16.916Z Has data issue: false hasContentIssue false
  • English
  • Français

Post Main-Sequence Changes in Rotational Velocities

Published online by Cambridge University Press:  26 May 2016

Helmut A. Abt
Helmut A. Abt*
Affiliation:
Kitt Peak National Observatory, Box 26732, Tucson, AZ 85726-6732, 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.

From recent measurements of the rotational velocities of 1100 B stars and 1700 A stars, we determined the maximum periods of binaries with fully circularized orbits. Combined with published data, we derived the relation of period (days) = 0.001 age0.42 (yr). We were able to reproduce the rotational velocities of giants from v sin i of dwarfs only if rigid body rotation applies to both. However for evolutionary expansions greater than 5 the angular momentum is conserved in shells, which is reasonable physically.

Information

Type
Session 1 Observations of Rotating Stars
Information
Symposium - International Astronomical Union , Volume 215: Stellar Rotation , 2004, pp. 154 - 155
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

Abt, H. A. 1957, ApJ 126, 503 Google Scholar
Abt, H. A. 1958. ApJ 127, 658 Google Scholar
Abt, H. A., Levato, H., & Grosso, M. 2002, ApJ 573, 359 CrossRefGoogle Scholar
Abt, H. A., & Morrell, N. I. 1995, ApJS, 99, 135 CrossRefGoogle Scholar
Bertelli, G., Bressan, A., Chiosi, C., & Angerer, K. 1986, A&A 66, 191 Google Scholar
Duquennoy, A., & Mayor, M. 1991, A&A 248, 485 Google Scholar
Latham, D. W., Mazeh, T., Carney, B. W., McCrosky, R. E., Stefanik, R. P., & Davis, R. J. 1988, 567 Google Scholar
Mathieu, R. D., & Mazeh, T. 1988, ApJ 326, 256 Google Scholar
Oke, J. B., & Greenstein, J. L. 1954, ApJ 120, 384 Google Scholar
Sandage, A. 1955, ApJ 122, 263 Google Scholar
Wilson, O. C., & Abt, H. A. 1954, ApJS 1, 1 CrossRefGoogle Scholar
Zahn, J. P. 1977, A&A 57, 383 Google Scholar