Hostname: page-component-78c5997874-mlc7c Total loading time: 0 Render date: 2024-11-17T19:43:58.516Z Has data issue: false hasContentIssue false
  • English
  • Français

CORAVEL Surveys to Study Binaries of Different Masses and Ages

Published online by Cambridge University Press:  12 April 2016

M. Mayor ,
A. Duquennoy ,
J.-L. Halbwachs  and
J.-C. Mermilliod
M. Mayor
Affiliation:
Geneva Observatory, 51 Chemin des Maillettes, CH-1290 Sauverny, Switzerland
A. Duquennoy
Affiliation:
Geneva Observatory, 51 Chemin des Maillettes, CH-1290 Sauverny, Switzerland
J.-L. Halbwachs
Affiliation:
Strasbourg Observatory, 11 rue de l’Université, F-69000 Strasbourg, France
J.-C. Mermilliod
Affiliation:
Lausanne Astronomical Institute, CH-1290 Chavannes-des-Bois, Switzerland

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.

Preliminary results are given for a systematic survey of K-dwarf stars in the solar vicinity. Nine companions to the G and K dwarfs have very low M2 sin i, less than 0.08 M⊙. These detections from a sample of 540 G and K primary stars support the reality of the existence of companions with mass below 0.08 M⊙: brown dwarfs exist.

A comparison of the relative mass function distribution f(m)/M1 between low-mass (M1 < 1.3 M⊙) and intermediate-mass (2 < M1 < 5 M⊙) binaries suggests a dependence of the mass-ratio distribution on the mass of the primary: f(q, M1).

By combining the photometric information with orbital elements constraints, we have derived the mass-ratio distribution for intermediate-mass stars. As is the case for low-mass stars, this distribution does not have any maximum close to M2/M1 = 1.

Type
Spectroscopic Studies
Information
International Astronomical Union Colloquium , Volume 135: Complementary Approaches to Double and Multiple Star Research , 1992 , pp. 73 - 81
Copyright
Copyright © Astronomical Society of the Pacific 1992

References

Baranne, A., Mayor, M., & Poncet, J.-L. 1979, Vistas Astron., 23, 279 Google Scholar
Boffin, H. & Jorissen, A. 1988, A&A, 205, 155 Google Scholar
Duquennoy, A. & Mayor, M. 1991, A&A, 248, 485 Google Scholar
Duquennoy, A., Mayor, M., & Mermilliod, J.-C. 1992a Binaries as Tracers of Stellar Formation eds Duquennoy, A. and Mayor, M., Cambridge, in pressGoogle Scholar
Duquennoy, A., Mayor, M., Andersen, J., Carquillat, J.-M., & North, P. 1992b, A&ALetters, 254, L13 Google Scholar
Fisher, D. & Marcy, G. 1992, ApJ, in pressGoogle Scholar
Gliese, W. 1969, Veröff. Astron. Rechen Inst. Heidelberg No 22 Google Scholar
Jorissen, A. & Mayor, M. 1992, A&A in pressGoogle Scholar
Mazeh, T., Goldberg, D., Duquennoy, A., & Mayor, M. 1992, ApJ, in pressGoogle Scholar
Mathieu, R.D., Duquennoy, A., Latham, D.W., Mayor, M., Mazeh, T., & Mermilliod, J.-C. 1992, Binaries as Tracers of Stellar Formation eds Duquennoy, A. and Mayor, M., Cambridge, in pressGoogle Scholar
Mermilliod, J.-C., Duquennoy, A., & Mayor, M. 1990, A&A, 235, 114 Google Scholar
Mermilliod, J.-C., Rosvick, J., Duquennoy, A., & Mayor, M. 1992, A&A submittedGoogle Scholar
Rosvick, J., Mermilliod, J.-C., & Mayor, M. 1992, A&A, 255, 130 Google Scholar
Tokovinin, A. 1992, A&A, 256, 121 Google Scholar
Zahn, J.-P. 1992, Binaries as Tracers of Stellar Formation eds Duquennoy, A. and Mayor, M., Cambridge, in pressGoogle Scholar