The planet search program at the ESO Coude Echelle spectrometer -: II.: The α Centauri system:: Limits for planetary companions

被引:52
作者
Endl, M
Kürster, M
Els, S
Hatzes, AP
Cochran, WD
机构
[1] Univ Vienna, Inst Astron, A-1180 Vienna, Austria
[2] European So Observ, Santiago 19, Chile
[3] Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany
[4] Heidelberg Univ, Inst Theoret Astrophys, D-69121 Heidelberg, Germany
[5] Univ Texas, McDonald Observ, Austin, TX 78712 USA
关键词
stars : planetary systems; stars : individual : alpha Centauri; stars : binaries : close; techniques : radial velocities;
D O I
10.1051/0004-6361:20010723
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In this article we present the results of the planet search program carried out at the ESO Coude Echelle Spectrometer (CES) for components A and B of the alpha Centauri system. Since November 1992 we have obtained high precision differential radial velocities (RVs) for both stars. We demonstrate that, after subtraction of the binary orbital motion, no additional residual RV signal is present within our detection limits, which could have been attributed to giant planets orbiting either of the two stars. We performed numerical simulations to determine the detection threshold of the CES survey for planets around both stars. In combination with known dynamical limitations for stable planetary orbits (Wiegert & Holman 1997) we can now set strong constraints on the existence of Jupiter-mass-type planets in the alpha Centauri system.
引用
收藏
页码:675 / 681
页数:7
相关论文
共 28 条
[1]  
ANOSOVA J, 1994, ASTRON ASTROPHYS, V292, P115
[2]  
BENEST D, 1988, ASTRON ASTROPHYS, V206, P143
[3]  
Cochran WD, 1999, ASTR SOC P, V185, P113
[4]  
DVORAK R, 1986, ASTRON ASTROPHYS, V167, P379
[5]  
Endl M, 2000, ASTRON ASTROPHYS, V362, P585
[6]  
ENDL M, 2001, P IAU S, V202
[7]   α Centauri AB [J].
Guenther, DB ;
Demarque, P .
ASTROPHYSICAL JOURNAL, 2000, 531 (01) :503-520
[8]  
GUINAN E, 1995, IAUC, V6259, pG2
[9]   ORBITAL COPLANARITY IN SOLAR-TYPE BINARY-SYSTEMS - IMPLICATIONS FOR PLANETARY SYSTEM FORMATION AND DETECTION [J].
HALE, A .
ASTRONOMICAL JOURNAL, 1994, 107 (01) :306-332
[10]   ROTATIONAL MODULATION IN IUE SPECTRA OF COOL DWARF CHROMOSPHERES .1. DATA-ANALYSIS AND PERIOD SEARCH TECHNIQUES [J].
HALLAM, KL ;
ALTNER, B ;
ENDAL, AS .
ASTROPHYSICAL JOURNAL, 1991, 372 (02) :610-632