The HARPS survey for southern extra-solar planets. 2. A 14 earth-masses exoplanet around Mu Arae - INSPIRE

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The HARPS survey for southern extra-solar planets. 2. A 14 earth-masses exoplanet around Mu Arae

Aug, 2004

Published in:

Astron.Astrophys. 426 (2004) L19-L23

e-Print:

astro-ph/0408471 [astro-ph]

DOI:

10.1051/0004-6361:200400076

Experiments:

HARPS

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reference search103 citations

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Abstract: (arXiv)

In this letter we present the discovery of a very light planetary companion to the star mu Ara (HD160691). The planet orbits its host once every 9.5days, and induces a sinusoidal radial velocity signal with a semi-amplitude of 4.1 m/s, the smallest Doppler amplitude detected so far. These values imply a mass of m2 sini = 14 earth-masses. This detection represents the discovery of a planet with a mass slightly smaller than that of Uranus, the smallest ``ice giant in our Solar System. Whether this planet can be considered an ice giant or a super-earth planet is discussed in the context of the core-accretion and migration models.

stars: individual: HD 160691
planetary systems
techniques: radial velocities

References(30)

Figures(0)

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