ANALYSIS OF SPIN-ORBIT ALIGNMENT IN THE WASP-32, WASP-38, AND HAT-P-27/WASP-40 SYSTEMS

被引：36

作者：

Brown, D. J. A. ^{[1
]}

Cameron, A. Collier ^{[1
]}

Diaz, R. F. ^{[2
]}

Doyle, A. P. ^{[3
]}

Gillon, M. ^{[4
]}

Lendl, M. ^{[5
]}

Smalley, B. ^{[3
]}

Triaud, A. H. M. J. ^{[5
]}

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

Enoch, B. ^{[1
]}

Hellier, C. ^{[3
]}

Maxted, P. F. L. ^{[3
]}

Miller, G. R. M. ^{[1
]}

Pollacco, D. ^{[6
,7
]}

Queloz, D.

Boisse, I. ^{[8
]}

Hebrard, G. ^{[9
,10
]}

机构：

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

[2] Aix Marseille Univ, CNRS, UMR 7326, LAM, F-13388 Marseille, France

[3] Keele Univ, Sch Phys & Geog Sci, Astrophys Grp, Keele ST5 5BG, Staffs, England

[4] Univ Liege, Inst Astrophys & Geophys, B-4000 Liege, Belgium

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

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

[7] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[8] Univ Porto, Ctr Astrofis, P-4150762 Oporto, Portugal

[9] Univ Paris 06, UMR7095, CNRS, Inst Astrophys Paris, F-75014 Paris, France

[10] Observ Haute Provence, CNRS, OAMP, F-04870 St Michel lObservatoire, France

来源：

ASTROPHYSICAL JOURNAL | 2012年 / 760卷 / 02期

基金：

瑞士国家科学基金会; 欧洲研究理事会;

关键词：

planets and satellites: dynamical evolution and stability; stars:; individual; (WASP-32; WASP-38; WASP-40); techniques: radial velocities; techniques: spectroscopic; ROSSITER-MCLAUGHLIN OBSERVATIONS; TRANSITING EXTRASOLAR PLANETS; LINE-PROFILE TOMOGRAPHY; HOT JUPITERS; EXOPLANETARY SYSTEMS; STELLAR ROTATION; DOPPLER SHADOW; SOLAR PLANETS; LIGHT CURVES; STARS;

D O I：

10.1088/0004-637X/760/2/139

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present measurements of the spin-orbit alignment angle,., for the hot Jupiter systems WASP-32, WASP-38, and HAT-P-27/WASP-40, based on data obtained using the HARPS spectrograph. We analyze the Rossiter-McLaughlin effect for all three systems and also carry out Doppler tomography for WASP-32 and WASP-38. We find that WASP-32 (T-eff = 6140(-100)(+90) K) is aligned, with an alignment angle of lambda = 10 degrees.5(-6.5)(+6.4) obtained through tomography, and that WASP-38 (T-eff = 6180(-60)(+40) K) is also aligned, with tomographic analysis yielding lambda = 7 degrees.5(-6.1)(+4.7). The latter result provides an order-of-magnitude improvement in the uncertainty in lambda compared to the previous analysis of Simpson et al. We are only able to loosely constrain the angle for HAT-P-27/WASP-40 (T-eff = 5190(-170)(+160) K) to lambda = 24 degrees.2(-44.5)(+76.0), owing to the poor signal-to-noise ratio of our data. We consider this result a non-detection under a slightly updated version of the alignment test of Brown et al. We place our results in the context of the full sample of spin-orbit alignment measurements, finding that they provide further support for previously established trends.

引用

页数：14

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