The HARPS survey for southern extra-solar planets -: II.: A 14 Earth-masses exoplanet around μArae

被引：181

作者：

Santos, NC ^{[1
]}

Bouchy, F

Mayor, M

Pepe, F

Queloz, D

Udry, S

Lovis, C

Bazot, M

Benz, W

Bertaux, JL

Lo Curto, G

Delfosse, X

Mordasini, C

Naef, D

Sivan, JP

Vauclair, S

机构：

[1] Univ Lisbon, Observ Astron Lisboa, Ctr Astron & Astrofis, P-1349018 Lisbon, Portugal

[2] Lab Astrophys Marseille, F-13013 Marseille, France

[3] Observ Geneva, CH-1290 Sauverny, Switzerland

[4] Observ Midi Pyrenees, Astrophys Lab, F-31400 Toulouse, France

[5] Univ Bern, Inst Phys, CH-3012 Bern, Switzerland

[6] CNRS, Serv Aeron, F-91371 Verrieres Le Buisson, France

[7] European So Observ, Santiago 19, Chile

[8] Observ Grenoble, Astrophys Lab, F-38400 St Martin Dheres, France

来源：

ASTRONOMY & ASTROPHYSICS | 2004年 / 426卷 / 01期

关键词：

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

D O I：

10.1051/0004-6361:200400076

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 9.5 days, and induces a sinusoidal radial velocity signal with a semi-amplitude of 4.1 m s(-1), the smallest Doppler amplitude detected so far. These values imply a mass of m(2) sin i = 14 M-circle times (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.

引用

页码：L19 / L23

页数：5

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