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Several problems of exoplanetary orbits determination from radial velocity observations

Published online by Cambridge University Press:  01 October 2007

Roman V. Baluev
Roman V. Baluev*
Affiliation:
Sobolev Astronomical Institute, Saint Petersburg State University, Universitetskij prospekt 28, Petrodvorets, Saint Petersburg 198504, Russia. email: [email protected]
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Abstract

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Existing algorithms of analysis of radial velocity time series are improved for the purposes of extrasolar planets detection and characterizing. Three important effects are considered: the poorly known radial velocity jitter, periodic systematic errors, and statistical bias due to non-linearity of models. Mathematical tools to account for these effects are developed and applied to a number of real planetary systems. In particular, it is shown that two outer planets of HD37124 are likely trapped in the 2/1 resonance. The dwarf star GJ876 may host an extra, Neptune-mass, planet which is in resonance with two giant planets in this system.

Keywords

methods: data analysistechniques: radial velocitiesstars: planetary systems
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S249: Exoplanets: Detection, Formation and Dynamics , October 2007 , pp. 101 - 110
Copyright
Copyright © International Astronomical Union 2008

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