Reference : Rossiter-McLaughlin effect measurements for WASP-16, WASP-25 and WASP-31★
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/120906
Rossiter-McLaughlin effect measurements for WASP-16, WASP-25 and WASP-31★
English
Brown, D J A [SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS]
Cameron, A Collier [SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS]
Anderson, D R [Astrophysics Group, School of Chemistry and Physics, Keele University, Staffordshire ST5 5BG]
Enoch, B [SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS]
Hellier, C [Astrophysics Group, School of Chemistry and Physics, Keele University, Staffordshire ST5 5BG]
Maxted, P F L [Astrophysics Group, School of Chemistry and Physics, Keele University, Staffordshire ST5 5BG]
Miller, G R M [SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS]
Pollacco, D [Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast BT7 1NN]
Queloz, D [Observatoire Astronomique de l'Université de Genève, Chemin des Maillettes 51, CH-1290 Sauverny, Switzerland]
Simpson, E [Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast BT7 1NN]
Smalley, B [Astrophysics Group, School of Chemistry and Physics, Keele University, Staffordshire ST5 5BG]
Triaud, A H M J [Observatoire Astronomique de l'Université de Genève, Chemin des Maillettes 51, CH-1290 Sauverny, Switzerland]
Boisse, I [Centro de Astrofisica da Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal]
Bouchy, F [Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre & Marie Curie, 98bis Boulevard Arago, 75014 Paris, France; Observatoire de Haute Provence, CNRS/OAMP, 04870 St Michel l'Observatoire, France]
Gillon, Michaël mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image]
Hébrard, G [Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre & Marie Curie, 98bis Boulevard Arago, 75014 Paris, France; Observatoire de Haute Provence, CNRS/OAMP, 04870 St Michel l'Observatoire, France]
1-Apr-2012
Monthly Notices of the Royal Astronomical Society
Blackwell Publishing
2920
Yes (verified by ORBi)
International
0035-8711
Oxford
United Kingdom
[en] techniques: radial velocities ; stars: individual: WASP-16 ; stars: individual: WASP-25 ; stars: individual: WASP-31 ; planetary systems
[en] We present new measurements of the Rossiter-McLaughlin (RM) effect for three Wide Angle Search for transiting Planets (WASP) planetary systems, WASP-16, WASP-25 and WASP-31, from a combined analysis of their complete sets of photometric and spectroscopic data. We find a low-amplitude RM effect for WASP-16 (T[SUB]eff[/SUB]= 5700 ± 150 K), suggesting that the star is a slow rotator and thus of an advanced age, and obtain a projected alignment angle of ?. For WASP-25 (T[SUB]eff[/SUB]= 5750 ± 100 K), we detect a projected spin-orbit angle of λ= 14°.6 ± 6°.7. WASP-31 (T[SUB]eff[/SUB]= 6300 ± 100 K) is found to be well aligned, with a projected spin-orbit angle of λ= 2°.8 ± 3°.1. A circular orbit is consistent with the data for all three systems, in agreement with their respective discovery papers. We consider the results for these systems in the context of the ensemble of RM measurements made to date. We find that whilst WASP-16 fits the hypothesis of Winn et al. that 'cool' stars (T[SUB]eff[/SUB] < 6250 K) are preferentially aligned, WASP-31 has little impact on the proposed trend. We bring the total distribution of the true spin-orbit alignment angle, ψ, up to date, noting that recent results have improved the agreement with the theory of Fabrycky & Tremaine at mid-range angles. We also suggest a new test for judging misalignment using the Bayesian information criterion, according to which WASP-25 b's orbit should be considered to be aligned.
http://hdl.handle.net/2268/120906
10.1111/j.1365-2966.2012.20973.x
http://adsabs.harvard.edu/abs/2012MNRAS.tmp.2920B
http://de.arxiv.org/abs/1203.4971

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Open access
1203.4971v1.pdfAuthor preprint1.44 MBView/Open

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.