Hot Jupiters with relatives: discovery of additional planets in orbit around WASP-41 and WASP-47

被引：58

作者：

Neveu-VanMalle, M. ^{[1
,2
]}

Queloz, D. ^{[1
,2
]}

Anderson, D. R. ^{[3
]}

Brown, D. J. A. ^{[4
]}

Cameron, A. Collier ^{[5
]}

Delrez, L. ^{[6
]}

Diaz, R. F. ^{[1
]}

Gillon, M. ^{[6
]}

Hellier, C. ^{[3
]}

Jehin, E. ^{[6
]}

Lister, T. ^{[7
]}

Pepe, F. ^{[1
]}

Rojo, P. ^{[8
]}

Segransan, D. ^{[1
]}

Triaud, A. H. M. J. ^{[1
,9
,10
]}

Turner, O. D. ^{[3
]}

Udry, S. ^{[1
]}

机构：

[1] Univ Geneva, Observ Astron, Chemin Maillettes 51, CH-1290 Sauverny, Switzerland

[2] Univ Cambridge, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England

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

[4] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England

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

[6] Univ Liege, Inst Astrophys & Geophys, Allee 6 Aout 17,Bat B5C,19C, B-4000 Liege 1, Belgium

[7] Las Cumbres Observ Global Telescope Network, 6740 Cortona Dr Suite 102, Goleta, CA 93117 USA

[8] Univ Chile, Dept Astron, Camino Observ 1515, Santiago, Chile

[9] Univ Toronto Scarborough, Ctr Planetary Sci, 1265 Mil Trail, Toronto, ON M1C 1A4, Canada

[10] Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada

来源：

ASTRONOMY & ASTROPHYSICS | 2016年 / 586卷

关键词：

stars: individual: WASP-47; stars: individual: WASP-41; techniques: photometric; techniques: radial velocities; techniques: spectroscopic; planetary systems; CA-II H; GIANT PLANET; 51; PEGASI; PARAMETERS; ALPHA; COMPANIONS; EXOPLANETS; PROJECT; SYSTEMS; STARS;

D O I：

10.1051/0004-6361/201526965

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of two additional planetary companions to WASP-41 and WASP-47. WASP-41 c is a planet of minimum mass 3.18 +/-0.20 M-Jup and eccentricity 0.29 +/- 0.02, and it orbits in 421 +/- 2 days. WASP-47 c is a planet of minimum mass 1.24 +/- 0.22 M-Jup and eccentricity 0.13+/-0.10, and it orbits in 572+/-7 days. Unlike most of the planetary systems that include a hot Jupiter, these two systems with a hot Jupiter have a long-period planet located at only similar to 1 au from their host star. WASP-41 is a rather young star known to be chromospherically active. To differentiate its magnetic cycle from the radial velocity effect induced by the second planet, we used the emission in the H alpha line and find this indicator well suited to detecting the stellar activity pattern and the magnetic cycle. The analysis of the Rossiter-McLaughlin effect induced by WASP-41 b suggests that the planet could be misaligned, though an aligned orbit cannot be excluded. WASP-47 has recently been found to host two additional transiting super Earths. With such an unprecedented architecture, the WASP-47 system will be very important for understanding planetary migration.

引用

页数：12

共 45 条

[1] Spin-orbit measurements and refined parameters for the exoplanet systems WASP-22 and WASP-26 [J].