Spectroscopic parameters for 451 stars in the HARPS GTO planet search program: Stellar [Fe/H] and the frequency of exo-Neptunes

被引：0
作者：
Sousa, S. G. [1 ,2 ]
Santos, N. C. [1 ,3 ]
Mayor, M. [3 ]
Udry, S. [3 ]
Casagrande, L. [4 ]
Israelian, G. [5 ]
Pepe, F.
Queloz, D. [3 ]
Monteiro, M. J. P. F. G. [1 ,2 ]
机构：
[1] Univ Porto, Ctr Astrofis, Rua Estrelas, P-4150762 Oporto, Portugal
[2] Univ Porto, Fac Ciencias, Dept Matemat Aplicada, Oporto, Portugal
[3] Observ Geneva, CH-1290 Sauverny, Switzerland
[4] Univ Turku, Tuorla Astronom Observat, FI-21500 Piikkio, Finland
[5] Inst Astrofis Canarias, San Cristobal la Laguna 38200, Spain
来源：
COOL STARS, STELLAR SYSTEMS AND THE SUN | 2009年 / 1094卷
关键词：
stars: fundamental parameters; stars: planetary systems; stars: planetary systems: formation; EXTRA-SOLAR PLANETS; MASS PLANET; SYSTEM; METALLICITIES;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a catalogue with accurate stellar parameters for the 451 stars that compose the HARPS Guaranteed Time Observations (GTO) "high precision" sample. We use our results, together with the others found in the literature, to study the metallicity-planet correlation, namely for very low mass planets. The results presented here suggests that contrarily to their jovian couterparts, neptune-like planets do not form preferentially around metal-rich stars. The ratio of jupiter-to-neptunes is also an increasing function of stellar metallicity. These results are discussed in the context or the core-accretion model for planet formation.
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页码：477 / +
页数：2
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