Extrasolar planets and brown dwarfs around A-F type stars V. A planetary system found with HARPS around the F6IV-V star HD 60532

被引：38

作者：

Desort, M. ^{[1
]}

Lagrange, A. -M. ^{[1
]}

Galland, F. ^{[1
]}

Beust, H. ^{[1
]}

Udry, S. ^{[2
]}

Mayor, M. ^{[2
]}

Curto, G. Lo ^{[3
]}

机构：

[1] Univ Grenoble 1, CNRS, UMR 5571, Astrophys Lab, F-38041 Grenoble 9, France

[2] Univ Geneva, Observ Geneva, CH-1290 Sauverny, Switzerland

[3] European So Observ, Santiago 19, Chile

来源：

ASTRONOMY & ASTROPHYSICS | 2008年 / 491卷 / 03期

关键词：

techniques: radial velocities; stars: early-type; stars: planetary systems; stars: individual: HD 60532; stars: oscillations;

D O I：

10.1051/0004-6361:200810241

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Aims. In the framework of the search for extrasolar planets and brown dwarfs around early-type stars, we present the results obtained for the F-type main-sequence star HD 60532 (F6V) with HARPS. Methods. Using 147 spectra obtained with HARPS at La Silla on a time baseline of two years, we studied the radial velocities of this star. Results. HD 60532 radial velocities are periodically variable, and the variations have a Keplerian origin. This star is surrounded by a planetary system of two planets with minimum masses of 1 and 2.5 M(Jup) and orbital separations of 0.76 and 1.58 AU, respectively. We also detect high-frequency, small-amplitude (10 ms(-1) peak-to-peak) pulsations. Dynamical studies of the system point toward a possible 3: 1 mean-motion resonance that should be confirmed within the next decade.

引用

页码：883 / U44

页数：7

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