Hostname: page-component-cd9895bd7-p9bg8 Total loading time: 0 Render date: 2024-12-26T04:11:29.981Z Has data issue: false hasContentIssue false
  • English
  • Français

The Cumulative Effect of Stellar Encounters on Multi-Planet Systems in Star Clusters

Published online by Cambridge University Press:  29 April 2014

Wei Hao  and
M. B. N. Kouwenhoven
Wei Hao
Affiliation:
Department of Astronomy, School of Physics, Peking University, Yi He Yuan Lu 5, Haidian Qu, Beijing 100871, P.R. China email: elvis@MPA-Garching.MPG.DE Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1 85741 Garching, Germany
M. B. N. Kouwenhoven
Affiliation:
Kavli Institute for Astronomy and Astrophysics (KIAA), Peking University, Yi He Yuan Lu 5, Haidian Qu, Beijing 100871, P.R. China email: kouwenhoven@pku.edu.cn
Rights & Permissions [Opens in a new window]

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.

Distant stellar encouters can substantially affect the dynamical evolution of existing stellar and planetary systems (e.g., Malmberg et al. 2007; Spurzem et al. 2009). Although planets with small orbital periods are not directly affected by encountering stars, the secular evolution of a perturbed system may result in the ejection of the innermost planets, or physical collisions between the innermost planets and the host star, hundreds of thousands of years after a weak encounter with a neighboring star occurs. Here we present the results of our study on the cumulative effect of distant stellar encounters on multi-planet systems in star clusters, and how these results depend on the properties of the star cluster in which a planetary system is born (for details we refer to Hao & Kouwenhoven, in prep.). With our simulations we explain the scarcity of exoplanets in star clusters, not only for those in wide orbits (affected by stellar encounters), but also in close orbits (affected by the secular evolution of the system following an encounter).

Keywords

Planetary systems — open clusters and associations: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S293: Formation, Detection, and Characterization of Extrasolar Habitable Planets , August 2012 , pp. 171 - 173
Copyright
Copyright © International Astronomical Union 2014 

References

Aarseth, S. J. 2003, Gravitational N-Body Simulations, Cambridge University PressGoogle Scholar
Chabrier, G. 2003, PASP, 115, 763CrossRefGoogle Scholar
Chambers, J. E. 1999, MNRAS, 304, 793Google Scholar
Cumming, A., Butler, R. P., Marcy, G. W., et al. 2008, PASP, 120, 531Google Scholar
Kokubo, E. & Ida, S. 2002, ApJ, 581, 666Google Scholar
Kouwenhoven, M. B. N., Goodwin, S. P., Parker, R. J., et al. 2010, MNRAS, 404, 1835Google Scholar
Lada, C. J. & Lada, E. A. 2003, ARAA, 41, 57Google Scholar
Lissauer, J. J., Ragozzine, D., Fabrycky, D. C., et al. 2011, ApJS, 197, 8CrossRefGoogle Scholar
Malmberg, D., de Angeli, F., Davies, M. B., et al. 2007, MNRAS, 378, 1207Google Scholar
Mikkola, S. & Aarseth, S. J. 1993, CeMDA, 57, 439Google Scholar
Spurzem, R., Giersz, M., Heggie, D. C., & Lin, D. N. C. 2009, ApJ, 697, 458Google Scholar
Zhou, J.-L., Lin, D. N. C., & Sun, Y.-S. 2007, ApJ, 666, 423CrossRefGoogle Scholar