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An extrasolar planetary system with three Neptune-mass planets.
Nature 2006; 441(7091):305-9Nat

Abstract

Over the past two years, the search for low-mass extrasolar planets has led to the detection of seven so-called 'hot Neptunes' or 'super-Earths' around Sun-like stars. These planets have masses 5-20 times larger than the Earth and are mainly found on close-in orbits with periods of 2-15 days. Here we report a system of three Neptune-mass planets with periods of 8.67, 31.6 and 197 days, orbiting the nearby star HD 69830. This star was already known to show an infrared excess possibly caused by an asteroid belt within 1 au (the Sun-Earth distance). Simulations show that the system is in a dynamically stable configuration. Theoretical calculations favour a mainly rocky composition for both inner planets, while the outer planet probably has a significant gaseous envelope surrounding its rocky/icy core; the outer planet orbits within the habitable zone of this star.

Authors+Show Affiliations

Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland. christophe.lovis@obs.unige.chNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16710412

Citation

Lovis, Christophe, et al. "An Extrasolar Planetary System With Three Neptune-mass Planets." Nature, vol. 441, no. 7091, 2006, pp. 305-9.
Lovis C, Mayor M, Pepe F, et al. An extrasolar planetary system with three Neptune-mass planets. Nature. 2006;441(7091):305-9.
Lovis, C., Mayor, M., Pepe, F., Alibert, Y., Benz, W., Bouchy, F., ... Sivan, J. P. (2006). An extrasolar planetary system with three Neptune-mass planets. Nature, 441(7091), pp. 305-9.
Lovis C, et al. An Extrasolar Planetary System With Three Neptune-mass Planets. Nature. 2006 May 18;441(7091):305-9. PubMed PMID: 16710412.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - An extrasolar planetary system with three Neptune-mass planets. AU - Lovis,Christophe, AU - Mayor,Michel, AU - Pepe,Francesco, AU - Alibert,Yann, AU - Benz,Willy, AU - Bouchy,François, AU - Correia,Alexandre C M, AU - Laskar,Jacques, AU - Mordasini,Christoph, AU - Queloz,Didier, AU - Santos,Nuno C, AU - Udry,Stéphane, AU - Bertaux,Jean-Loup, AU - Sivan,Jean-Pierre, PY - 2006/03/10/received PY - 2006/04/18/accepted PY - 2006/5/20/pubmed PY - 2006/5/20/medline PY - 2006/5/20/entrez SP - 305 EP - 9 JF - Nature JO - Nature VL - 441 IS - 7091 N2 - Over the past two years, the search for low-mass extrasolar planets has led to the detection of seven so-called 'hot Neptunes' or 'super-Earths' around Sun-like stars. These planets have masses 5-20 times larger than the Earth and are mainly found on close-in orbits with periods of 2-15 days. Here we report a system of three Neptune-mass planets with periods of 8.67, 31.6 and 197 days, orbiting the nearby star HD 69830. This star was already known to show an infrared excess possibly caused by an asteroid belt within 1 au (the Sun-Earth distance). Simulations show that the system is in a dynamically stable configuration. Theoretical calculations favour a mainly rocky composition for both inner planets, while the outer planet probably has a significant gaseous envelope surrounding its rocky/icy core; the outer planet orbits within the habitable zone of this star. SN - 1476-4687 UR - https://www.unboundmedicine.com/medline/citation/16710412/An_extrasolar_planetary_system_with_three_Neptune_mass_planets_ L2 - https://doi.org/10.1038/nature04828 DB - PRIME DP - Unbound Medicine ER -