The HARPS search for southern extra-solar planets XVII. Six long-period giant planets around BD -1
The HARPS search for southern extra-solar planets XVII. Six long-period giant planets around BD -1
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HARPS 搜寻南系外行星 XVII。
DOI：
10.1051/0004-6361:200810941
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发表时间：
2008
影响因子：
6.5
通讯作者：
N. Santos
中科院分区：
文献类型：
--
作者：
C. Moutou;M. Mayor;G. Curto;S. Udry;F. Bouchy;W. Benz;C. Lovis;D. Naef;F. Pepe;D. Queloz;N. Santos
我们报道了安装在智利拉西拉的ESO 3.6米望远镜上的HARPS仪器通过多次多普勒测量发现了六个新的主序恒星的亚星伴星。这些太阳系外行星围绕着恒星BD-170063、HD 20868、HD 73267、HD 131664、HD 145377和HD 153950运行。给出了重现观测数据的轨道特性，以及恒星和行星参数。伴星的质量从2到18木星质量不等，周期从100天到2000天不等。仔细分析了观测数据的活动诱导效应，我们得出结论，观测到的径向速度变化来自行星外。特别令人感兴趣的是这颗非常大的行星(或棕矮星伴星)，它绕着富含金属的HD 131664运行，m2 Sini=18.15MJup，轨道周期为5.34年。这些新发现与迄今已知的系外行星样本的观测统计特性一致。
We report the discovery of six new substellar companions of main-sequence stars, detected by multiple Doppler measurements with the instrument HARPS installed on the ESO 3.6 m telescope, La Silla, Chile. These extrasolar planets orbit the stars BD -17 0063, HD 20868, HD 73267, HD 131664, HD 145377, and HD 153950. The orbital characteristics that reproduce the observed data are presented, as well as the stellar and planetary parameters. Masses of the companions range from 2 to 18 Jupiter masses, and periods range from 100 to 2000 days. The observational data are carefully analysed for activity-induced effects, and we conclude that the observed radial velocity variations are of exoplanetary origin. Of particular interest is the very massive planet (or brown-dwarf companion) orbiting the metal-rich HD 131664 with m2 sini = 18.15 MJup and a 5.34-year orbital period. These new discoveries are consistent with the observed statistical properties of exoplanet samples known so far.