Two new planets from the Anglo-Australian planet search

被引：132

作者：

Butler, RP

Tinney, CG

Marcy, GW

Jones, HRA

Penny, AJ

Apps, K

机构：

[1] Carnegie Inst Washington, Dept Terr Magnetism, Washington, DC 20015 USA

[2] Anglo Australian Observ, Epping, NSW 1710, Australia

[3] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[4] San Francisco State Univ, Dept Phys & Astron, San Francisco, CA 94132 USA

[5] Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England

[6] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[7] Univ Sussex, Brighton BN1 9QJ, E Sussex, England

来源：

ASTROPHYSICAL JOURNAL | 2001年 / 555卷 / 01期

关键词：

planetary systems; stars; individual; (HD; 160691; HD; 26442);

D O I：

10.1086/321467

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Precise Doppler measurements from the Anglo-Australian Telescope (AAT) UCLES spectrometer reveal periodic Keplerian velocity variations in the stars HD 160691 and HD 27442. HD 160691 has a period of 743 days, a semiamplitude of 54 m s(-1), and a high eccentricity, e=0.62, typical of extrasolar planets orbiting beyond 0.2 AU. The minimum (M sin i) mass of the companion is 1.97 M-J, and the semimajor axis is 1.65 AU. HD 27442 has a 415 day period, a semiamplitude of 32 m s(-1), and an eccentricity of 0.058. The minimum mass is 1.43 M-J and the semimajor axis is 1.18 AU. This is the first extrasolar planet orbiting beyond 0.2 AU that is in a circular orbit similar to solar system planets. The photon-limited precision of AAT/UCLES measurements is 3 m s(-1) as demonstrated by stable stars and Keplerian fits to planet-bearing stars. In addition, we present confirmation of four previously announced planets.

引用

页码：410 / 417

页数：8

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