Skip to main content Accessibility help
×
Home

Psi Sagittarii, A System with Three Evolved Components*

  • F. C. Fekel (a1)

Abstract

The visual binary Psi Sagittarii (ADS 12214, HR 7292) is a spectroscopic triple system with orbital periods of 10.78 days and 20.0 years. Periastron passage in the long period crbit occurred on JD 2442410 ± 30 days. Masses derived from the parameters of the spectroscopic and visual orbits are 2.7 m for the visual primary, 2.1 m for the short period pair primary, and 1.7 m for the short period pair secondary. The distance to the system is 100 parsecs. The orbital inclination of the close pair is nearly the same numerically as that of the visual orbit. Suggested spectral classifications indicate that all three components have evolved off the main sequence. Mass exchange in the close pair has not yet occurred.

Resumen

La binaria visual Psi Sagittarii (ADS 12214, HR7292) es en realidad un sistema triple espectroscópico con períodos orbitales de 10.78 días y 20.0 años. El paso por el periastro en la òrbita de largo período ocurrió el JD 2442410 ± 30 días. Las masas obtenidas de los parámetros orbitales espectroscópicos y visuales son: 2.7 m para la primaria visual y 2.1 m para la primaria del par de período corto y 1.7 m para la secundaria del par con período corto. La distancia al sistema es de 100 parsecs. La inclinación orbital del par cerrado es casi la misma numéricamente que la de la órbita visual. Las clasificaciones espectrales que se han sugerido indican que las tres componentes han evolucionado fuera de la secuencia principal. Aún no ha ocurrido intercambio de masa en el par cerrado.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Psi Sagittarii, A System with Three Evolved Components*
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Psi Sagittarii, A System with Three Evolved Components*
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Psi Sagittarii, A System with Three Evolved Components*
      Available formats
      ×

Copyright

Footnotes

Hide All
*

Figures 1, 2, 3 and 5 have been reproduced from Astronomical Journal, Vol. 80, p. 844 ff, published by the American Institute of Physics for the American Astronomical Society.

Footnotes

References

Hide All
Dommanget, J., and Nys, O. 1967, Comm. Obs. R. Belgique, B15.
Evans, D. S. 1956, M.N.R.A.S., 116, 537.
Evans, D. S. 1968, Quart. J.R.A.S., 9, 388.
Evans, D. S. 1969, M.N.R.A.S., 142, 523.
Finsen, W. S., and Worley, C. E. 1970, Republ. Obs. Johannesb. Circ, 7, N» 129.
Harris, D. L., Strand, K. Aa., and Worley, C. E. 1963, Basic Astronomical Data, ed. Strand, K. Aa. (Chicago: University of Chicago Press), 273.
Heintze, J. R. W. 1973, IAU Symposium N° 54, eds. Hauck, B. and Westerlund, B. E. (Dordrecht: D. Reidel), 231.
Iben, I. 1967a, Ap. J., 147, 624.
Iben, I. 1967b, Ap. J., 147, 650.
Pésurname>trie, R. M., and Batten, A. H. 1970, Pub. D.A.O., 13, 383.
Pétrie, R. M., and Laidler, D. M. 1952, Pub. D.A.O., 9, 181.
van den Bos, W. H. 1957, Union Obs. Circ, 116, 291.
van Flandern, T. C. 1975, private communication.

Psi Sagittarii, A System with Three Evolved Components*

  • F. C. Fekel (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed