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A false planet around HD 192263

被引：55
作者：
Henry, GW
Donahue, RA
Baliunas, SL
机构：
[1] Tennessee State Univ, Ctr Excellence Informat Syst, Nashville, TN 37203 USA
[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[3] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA
[4] Mt Wilson Observ, Pasadena, CA 91106 USA
来源：
ASTROPHYSICAL JOURNAL | 2002年 / 577卷 / 02期
基金：
美国国家科学基金会; 美国国家航空航天局;
关键词：
planetary systems; stars : individual (HD 192263); stars : late-type; stars : rotation; stars : spots; stars : variables : other;
D O I：
10.1086/344291
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present new high-precision Stromgren photometry and Ca II H and K spectrophotometry of HD 192263. Based on radial velocity variations detected previously by two groups, this K2 V star was thought to host a 0.75 M-Jup (minimum mass) planetary companion in a 24 day orbit. Our photometric observations reveal periodic variations that match the purported planetary orbital period, while the Ca II H and K emission fluxes are modulated on half the planetary period. This suggests that rotational modulation of the visibility of stellar surface activity is the source of the observed radial velocity variations. Therefore, HD 192263 should be removed from lists of stars with well-established planetary companions unless further observations and analysis can support the existence of the planet in spite of the star's intrinsic variations.
引用
收藏
页码：L111 / L114
页数：4
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