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dc.contributor.authorBrown, D. J. A.
dc.contributor.authorTriaud, A. H. M. J.
dc.contributor.authorDoyle, A. P.
dc.contributor.authorGillon, M.
dc.contributor.authorLendl, M.
dc.contributor.authorAnderson, D. R.
dc.contributor.authorCollier Cameron, A.
dc.contributor.authorHébrard, G.
dc.contributor.authorHellier, C.
dc.contributor.authorLovis, C.
dc.contributor.authorMaxted, P. F. L.
dc.contributor.authorPepe, F.
dc.contributor.authorPollacco, D.
dc.contributor.authorQueloz, D.
dc.contributor.authorSmalley, B.
dc.identifier.citationBrown , D J A , Triaud , A H M J , Doyle , A P , Gillon , M , Lendl , M , Anderson , D R , Collier Cameron , A , Hébrard , G , Hellier , C , Lovis , C , Maxted , P F L , Pepe , F , Pollacco , D , Queloz , D & Smalley , B 2017 , ' Rossiter–McLaughlin models and their effect on estimates of stellar rotation, illustrated using six WASP systems ' , Monthly Notices of the Royal Astronomical Society , vol. 464 , no. 1 , pp. 810-839 .
dc.identifier.otherRIS: urn:A55EE0C0C1BB1924E4CC7D1863FB0580
dc.identifier.otherORCID: /0000-0002-8863-7828/work/58531466
dc.description.abstractWe present new measurements of the projected spin-orbit angle λ for six WASP hot Jupiters, four of which are new to the literature (WASP-61, -62, -76, and -78), and two of which are new analyses of previously measured systems using new data (WASP-71, and -79). We use three different models based on two different techniques: radial velocity measurements of the Rossiter–McLaughlin effect, and Doppler tomography. Our comparison of the different models reveals that they produce projected stellar rotation velocities (v sin Is) measurements often in disagreement with each other and with estimates obtained from spectral line broadening. The Boué model for the Rossiter–McLaughlin effect consistently underestimates the value of v sin Is compared to the Hirano model. Although v sin Is differed, the effect on λ was small for our sample, with all three methods producing values in agreement with each other. Using Doppler tomography, we find that WASP-61 b ($\lambda =4{^{\circ}_{.}}0^{+17.1}_{\,\,\,-18.4}$), WASP-71 b ($\lambda =-1{^{\circ}_{.}}9^{+7.1}_{\,\,\,-7.5}$), and WASP-78 b (λ = −6 $_{.}^{\circ}$4 ± 5.9) are aligned. WASP-62 b ($\lambda =19{^{\circ}_{.}}4^{+5.1}_{\,\,\,-4.9}$) is found to be slightly misaligned, while WASP-79 b ($\lambda =-95{^{\circ}_{.}}2^{+0.9}_{\,\,\,-1.0}$) is confirmed to be strongly misaligned and has a retrograde orbit. We explore a range of possibilities for the orbit of WASP-76 b, finding that the orbit is likely to be strongly misaligned in the positive λ direction.
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.subjectTechniques: photometricen
dc.subjectTechniques: radial velocitiesen
dc.subjectTechniques: spectroscopicen
dc.subjectPlanetary systemsen
dc.subjectStars: rotationen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleRossiter–McLaughlin models and their effect on estimates of stellar rotation, illustrated using six WASP systemsen
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.description.statusPeer revieweden

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