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HD 83443: a system with two Saturns

Published online by Cambridge University Press:  26 May 2016

M. Mayor ,
D. Naef ,
F. Pepe ,
D. Queloz ,
N. C. Santos ,
S. Udry  and
M. Burnet
M. Mayor
Affiliation:
Observatoire de Genève, CH-1290 Sauverny, Switzerland
D. Naef
Affiliation:
Observatoire de Genève, CH-1290 Sauverny, Switzerland
F. Pepe
Affiliation:
Observatoire de Genève, CH-1290 Sauverny, Switzerland
D. Queloz
Affiliation:
Observatoire de Genève, CH-1290 Sauverny, Switzerland
N. C. Santos
Affiliation:
Observatoire de Genève, CH-1290 Sauverny, Switzerland
S. Udry
Affiliation:
Observatoire de Genève, CH-1290 Sauverny, Switzerland
M. Burnet
Affiliation:
Observatoire de Genève, CH-1290 Sauverny, Switzerland

Abstract

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We report the discovery of an extrasolar planetary system with two Saturnian planets around the star HD 83443. The new planetary system is unusual by more than one aspect, as it contains two very low–mass gaseous giant planets, both on very tight orbits. Among the planets detected so far, the inner planet has the smallest semi–major axis (0.038 AU) and period (2.985 days) whereas the outer planet is the lightest one with m2 sin i = 0.53 MSat. A preliminary dynamical study confirms the stability of the system.

Type
Part I: Discovery and study of extrasolar planets - current
Information
Symposium - International Astronomical Union , Volume 202: Planetary Systems in the Universe – Observation, Formation and Evolution , 2004 , pp. 84 - 86
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

Butler, R.P., Marcy, G.W., Fischer, D.A., et al. 1999, ApJ, 526, 916.Google Scholar
Udry, S., Mayor, M., Naef, D., et al. 2000, A&A, 356, 590.Google Scholar