Orbital alignment and star-spot properties in the WASP-52 planetary system

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dc.contributor.authorMancini, L.
dc.contributor.authorSouthworth, J.
dc.contributor.authorRaia, G.
dc.contributor.authorTregloan Reed, J.
dc.contributor.authorMolliere, P.
dc.contributor.authorBozza, V.
dc.contributor.authorBretton, M.
dc.contributor.authorBruni, I.
dc.contributor.authorCiceri, S.
dc.contributor.authorD'Ago, G.
dc.contributor.authorDominik, M.
dc.contributor.authorHinse, T. C.
dc.contributor.authorHundertmark, M.
dc.contributor.authorJorgensen, U. G.
dc.contributor.authorKorhonen, H.
dc.contributor.authorRabus, M.
dc.contributor.authorRahvar, S.
dc.contributor.authorStarkey, D.
dc.contributor.authorNovati, S. Calchi
dc.contributor.authorJaimes, R. Figuera
dc.contributor.authorHenning, Th.
dc.contributor.authorJuncher, D.
dc.contributor.authorHaugbolle, T.
dc.contributor.authorKains, N.
dc.contributor.authorPopovas, A.
dc.contributor.authorSchmidt, R. W.
dc.contributor.authorSkottfelt, J.
dc.contributor.authorSnodgrass, C.
dc.contributor.authorSurdej, J.
dc.contributor.authorWertz, O.
dc.date.accessioned2024-01-10T13:51:38Z
dc.date.available2024-01-10T13:51:38Z
dc.date.issued2017
dc.description.abstractWe report 13 high-precision light curves of eight transits of the exoplanet WASP-52 b, obtained by using four medium-class telescopes, through different filters, and adopting the defocussing technique. One transit was recorded simultaneously from two different observatories and another one from the same site but with two different instruments, including a multiband camera. Anomalies were clearly detected in five light curves and modelled as star-spots occulted by the planet during the transit events. We fitted the clean light curves with the JKTEBOP code, and those with the anomalies with the PRISM + GEMC codes in order to simultaneously model the photometric parameters of the transits and the position, size and contrast of each star-spot. We used these new light curves and some from the literature to revise the physical properties of the WASP-52 system. Star-spots with similar characteristics were detected in four transits over a period of 43 d. In the hypothesis that we are dealing with the same star-spot, periodically occulted by the transiting planet, we estimated the projected orbital obliquity of WASP-52 b to be. = 3 degrees.8 +/- 8 degrees.4. We also determined the true orbital obliquity, psi = 20 degrees +/- 50 degrees, which is, although very uncertain, the first measurement of. purely from star-spot crossings. We finally assembled an optical transmission spectrum of the planet and searched for variations of its radius as a function of wavelength. Our analysis suggests a flat transmission spectrum within the experimental uncertainties.
dc.description.funderUGJ from the Danish Natural Science Research Council (FNU)
dc.description.funderCommunaute francaise de Belgique - Actions de recherche concertees - Academie Wallonie-Europe
dc.description.funderKorea Research Council for Fundamental Science and Technology (KRCF) through the Young Research Scientist Fellowship Programme
dc.description.funderKASI research grant
dc.description.funderScience and Technology Facilities Council
dc.fechaingreso.objetodigital2024-04-29
dc.format.extent15 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stw1987
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stw1987
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/79615
dc.identifier.wosidWOS:000393782000059
dc.information.autorucFísica;Rabus M;S/I;1008065
dc.issue.numero1
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final857
dc.pagina.inicio843
dc.publisherOXFORD UNIV PRESS
dc.revistaMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
dc.rightsacceso restringido
dc.subjecttechniques: photometric
dc.subjectstars: fundamental parameters
dc.subjectstars: individual: WASP-52
dc.subjectplanetary systems
dc.subjectOPTICAL-TRANSMISSION SPECTRUM
dc.subjectSTELLAR EVOLUTION DATABASE
dc.subjectHIGH-PRECISION PHOTOMETRY
dc.subjectEXOPLANET HOST STARS
dc.subjectTRANSIT LIGHT-CURVE
dc.subjectMULTICOLOR PHOTOMETRY
dc.subjectPHYSICAL-PROPERTIES
dc.subjectHOT-JUPITER
dc.subjectMODEL ATMOSPHERES
dc.subjectTIDAL-EVOLUTION
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleOrbital alignment and star-spot properties in the WASP-52 planetary system
dc.typeartículo
dc.volumen465
sipa.codpersvinculados1008065
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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