Reference : The spin-orbit angles of the transiting exoplanets WASP-1b, WASP-24b, WASP-38b and HAT-P...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/95265
The spin-orbit angles of the transiting exoplanets WASP-1b, WASP-24b, WASP-38b and HAT-P-8b from Rossiter-McLaughlin observations
English
Simpson, E. K. [> > > >]
Pollacco, D. [> > > >]
Collier Cameron, A. [> > > >]
Hebrard, G. [> > > >]
Anderson, D. R. [> > > >]
Barros, S. C. C. [> > > >]
Boisse, I. [> > > >]
Bouchy, F. [> > > >]
Faedi, F. [> > > >]
Gillon, Michaël mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Hebb, L. [> > > >]
Keenan, F. P. [> > > >]
Miller, G. R. M. [> > > >]
Moutou, C. [> > > >]
Queloz, D. [> > > >]
Skillen, I. [> > > >]
Sorensen, P. [> > > >]
Stempels, H. C. [> > > >]
Triaud, A. [> > > >]
Watson, C. A. [> > > >]
Wilson, P. A. [> > > >]
1-Jul-2011
Monthly Notices of the Royal Astronomical Society
Blackwell Publishing
414
3023
Yes (verified by ORBi)
International
0035-8711
Oxford
United Kingdom
[en] Astrophysics - Earth and Planetary Astrophysics
[en] We present observations of the Rossiter-McLaughlin effect for the transiting exoplanet systems WASP-1, WASP-24, WASP-38 and HAT-P-8, and deduce the orientations of the planetary orbits with respect to the host stars' rotation axes. The planets WASP-24b, WASP-38b and HAT-P-8b appear to move in prograde orbits and be well aligned, having sky-projected spin orbit angles consistent with zero: {\lambda} = -4.7 \pm 4.0{\deg}, {\lambda} = 15 + 33{\deg}/-43{\deg} and {\lambda} = -9.7 +9.0{\deg}/-7.7{\deg}, respectively. The host stars have Teff < 6250 K and conform with the trend of cooler stars having low obliquities. WASP-38b is a massive planet on a moderately long period, eccentric orbit so may be expected to have a misaligned orbit given the high obliquities measured in similar systems. However, we find no evidence for a large spin-orbit angle. By contrast, WASP-1b joins the growing number of misaligned systems and has an almost polar orbit, {\lambda} = -79 +4.5{\deg}/-4.3{\deg}. It is neither very massive, eccentric nor orbiting a hot host star, and therefore does not share the properties of many other misaligned systems.
http://hdl.handle.net/2268/95265
http://adsabs.harvard.edu/abs/2010arXiv1011.5664S

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