WASP-41b: A Transiting Hot Jupiter Planet Orbiting a Magnetically Active G8V Star

被引：118

作者：

Maxted, P. F. L. ^{[1
]}

Anderson, D. R. ^{[1
]}

Cameron, A. Collier ^{[2
]}

Hellier, C. ^{[1
]}

Queloz, D. ^{[3
]}

Smalley, B. ^{[1
]}

Street, R. A. ^{[4
]}

Triaud, A. H. M. J. ^{[3
]}

West, R. G. ^{[5
]}

Gillon, M. ^{[6
]}

Lister, T. A. ^{[4
]}

Pepe, F. ^{[3
]}

Pollacco, D. ^{[7
]}

Segransan, D. ^{[3
]}

Smith, A. M. S. ^{[1
]}

Udry, S. ^{[3
]}

机构：

[1] Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs, England

[2] Univ St Andrews, SUPA, Sch Phys & Astron, Haugh KY16 9SS, Fife, Scotland

[3] Univ Geneva, Astron Observ, CH-1290 Sauverny, Switzerland

[4] Las Cumbres Observ, Santa Barbara, CA 93117 USA

[5] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

[6] Univ Liege, Inst Astrophys & Geophys, Liege 1, Belgium

[7] Queens Univ Belfast, Sch Math & Phys, Astrophys Res Ctr, Belfast BT7 1NN, Antrim, North Ireland

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 2011年 / 123卷 / 903期

基金：

英国科学技术设施理事会;

关键词：

MAIN-SEQUENCE STARS; STELLAR ACTIVITY; PHOTOMETRY; ROTATION; MASSES; ERRORS;

D O I：

10.1086/660007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of a transiting planet with an orbital period of 3.05 days orbiting the star TYC 7247-587-1. The star, WASP-41, is a moderately bright G8 V star (V 11: 6) with a metallicity close to solar ([Fe/H] = -0.08 +/- 0.09). The star shows evidence of moderate chromospheric activity, both from emission in the cores of the Ca Pi H and K ines and photometric variability with a period of 18.4 days and an amplitude of about 1%. We use a new method to show quantitatively that this periodic signal has a low false-alarm probability. The rotation period of the star implies a gyrochronological age for WASP-41 of 1.8 Gyr with an error of about 15%. We have used a combined analysis of the available photometric and spectroscopic data to derive the mass and radius of the planet (0.92 +/- 0.06 M-Jup, 1.20 +/- 0.06 R-Jup). Further observations of WASP-41 can be used to explore the connections between the properties of hot Jupiter planets and the level of chromospheric activity in their host stars.

引用

页码：547 / 554

页数：8

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