J/A+A/668/A117ivo://CDS.VizieR/J/A+A/668/A117doi:10.26093/cds/vizier.36680117CDSHoyer S.Bonfanti A.Leleu A.Acuna L.Serrano L.M.Deleuil M.,Bekkelien A.Broeg C.Floren H.-G.Queloz D.Wilson T.G.Sousa S.G.,Hooton M.J.Adibekyan V.Alibert Y.Alonso R.Anglada G.Asquier J.,Barczy T.Barrado D.Barros S.C.C.Baumjohann W.Beck M.Beck T.,Benz W.Billot N.Biondi F.Bonfils X.Brandeker A.Cabrera J.,Charnoz S.Collier Cameron A.Csizmadia Sz.Davies M.B.Delrez L.,Demangeon O.D.S.Demory B.-O.Ehrenreich D.Erikson A.Fortier A.,Fossati L.Fridlund M.Gandolfi D.Gillon M.Gudel M.Hara N.Heng K.,Isaak K.G.Jenkins J.M.Kiss L.L.Laskar J.Latham D.W.,Lecavelier des Etangs A.Lendl M.Lovis C.Luntzer A.Magrin D.,Maxted P.F.L.Nascimbeni V.Olofsson G.Ottensamer R.Pagano I.,Palle E.Persson C.M.Peter G.Piazza D.Piotto G.Pollacco D.,Ragazzoni R.Rando N.Rauer H.Ribas I.Ricker G.R.Salmon S.,Santos N.C.Scandariato G.Seager S.Segransan D.Simon A.E.,Smith A.M.S.Steller M.Szabo Gy.M.Thomas N.Twicken J.D.Udry S.,Van Grootel V.Vanderspek R.K.Walton N.A.Westerdorff K.Winn J.N.2024-11-06T20:01:33Z2022-12-13T08:25:56ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmultiple-starsexoplanetsphotometryvisible-astronomyThe HD 108236 system was first announced with the detection of four small planets based on TESS data. Shortly after, the transit of an additional planet with a period of 29.54d was serendipitously detected by CHEOPS. In this way, HD 108236 (V=9.2) became one of the brightest stars known to host five small transiting planets (R_p_<3R_Earth_). We characterize the planetary system by using all the data available from CHEOPS and TESS space missions. We use the flexible pointing capabilities of CHEOPS to follow up the transits of all the planets in the system, including the fifth transiting body. After updating the host star parameters by using the results from Gaia eDR3, we analyzed 16 and 43 transits observed by CHEOPS and TESS, respectively, to derive the planets physical and orbital parameters. We carried out a timing analysis of the transits of each of the planets of HD 108236 to search for the presence of transit timing variations. We derived improved values for the radius and mass of the host star (R_star_=0.876+/-0.007R_{sun}_ and M_star_=0.867_-0.046_^+0.047^M_{sun}_). We confirm the presence of the fifth transiting planet f in a 29.54d orbit. Thus, the HD 108236 system consists of five planets of R_b_=1.587+/-0.028, R_c_=2.122+/-0.025, R_d_=2.629+/-0.031, R_e_=3.008+/-0.032, and R_f_=1.89+/-0.04[R_Earth_]. We refine the transit ephemeris for each planet and find no significant transit timing variations for planets c, d, and e. For planets b and f, instead, we measure significant deviations on their transit times (up to 22 and 28min, respectively) with a non-negligible dispersion of 9.6 and 12.6min in their time residuals. We confirm the presence of planet f and find no significant evidence for a potential transiting planet in a 10.9d orbital period, as previously suggested. Further monitoring of the transits, particularly for planets b and f, would confirm the presence of the observed transit time variations. HD 108236 thus becomes a key multi-planetary system for the study of formation and evolution processes. The reported precise results on the planetary radii -- together with a profuse RV monitoring -- will allow for an accurate characterization of the internal structure of these planets.2022A&A...668A.117Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/668/A117CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/668/A117https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/668/A117http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/668/A117https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/668/A117https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/668/A117http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/668/A117GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/668/A117/tg000101Photometric data visit 1. Transits of planets c, e, (g)ContamEstimated contamination from background starsctphot.countdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of observation (BJD)dtime.epochdoubleNFluxDetrended normalised fluxphot.fluxdoublee_NFluxError on detrended normalised fluxstat.errordoubleRollRoll angle of the observationdeginstr.offsetdoubleBkgBackgroundctinstr.backgrounddoubleXlocX location of target in CCDpixpos.cartesian.xdoubleYlocY location of target in CCDpixpos.cartesian.ydoubleXcntX centroid of the target PSFpixinstr.det.psfdoubleYcntY centroid of the target PSFpixinstr.det.psfdoubleJ/A+A/668/A117/tg015701Photometric data visit 2. Transits of planet brecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of observation (BJD)dtime.epochdoubleNFluxDetrended normalised fluxphot.fluxdoublee_NFluxError on detrended normalised fluxstat.errordoubleRollRoll angle of the observationdeginstr.offsetdoubleBkgBackgroundctinstr.backgrounddoubleXlocX location of target in CCDpixpos.cartesian.xdoubleYlocY location of target in CCDpixpos.cartesian.ydoubleXcntX centroid of the target PSFpixinstr.det.psfdoubleYcntY centroid of the target PSFpixinstr.det.psfdoubleContamEstimated contamination from background starsctphot.countdoubleJ/A+A/668/A117/tg015401Photometric data visit 3. Transits of planet drecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of observation (BJD)dtime.epochdoubleNFluxDetrended normalised fluxphot.fluxdoublee_NFluxError on detrended normalised fluxstat.errordoubleRollRoll angle of the observationdeginstr.offsetdoubleBkgBackgroundctinstr.backgrounddoubleXlocX location of target in CCDpixpos.cartesian.xdoubleYlocY location of target in CCDpixpos.cartesian.ydoubleXcntX centroid of the target PSFpixinstr.det.psfdoubleYcntY centroid of the target PSFpixinstr.det.psfdoubleContamEstimated contamination from background starsctphot.countdoubleJ/A+A/668/A117/tg015601Photometric data visit 4. Transits of planet crecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of observation (BJD)dtime.epochdoubleNFluxDetrended normalised fluxphot.fluxdoublee_NFluxError on detrended normalised fluxstat.errordoubleRollRoll angle of the observationdeginstr.offsetdoubleBkgBackgroundctinstr.backgrounddoubleXlocX location of target in CCDpixpos.cartesian.xdoubleYlocY location of target in CCDpixpos.cartesian.ydoubleXcntX centroid of the target PSFpixinstr.det.psfdoubleYcntY centroid of the target PSFpixinstr.det.psfdoubleContamEstimated contamination from background starsctphot.countdoubleJ/A+A/668/A117/tg015702Photometric data visit 5. Transits of planets b and frecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of observation (BJD)dtime.epochdoubleNFluxDetrended normalised fluxphot.fluxdoublee_NFluxError on detrended normalised fluxstat.errordoubleRollRoll angle of the observationdeginstr.offsetdoubleBkgBackgroundctinstr.backgrounddoubleXlocX location of target in CCDpixpos.cartesian.xdoubleYlocY location of target in CCDpixpos.cartesian.ydoubleYcntY centroid of the target PSFpixinstr.det.psfdoubleContamEstimated contamination from background starsctphot.countdoubleXcntX centroid of the target PSFpixinstr.det.psfdoubleJ/A+A/668/A117/tg015602Photometric data visit 6. Transits of planet crecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of observation (BJD)dtime.epochdoubleNFluxDetrended normalised fluxphot.fluxdoublee_NFluxError on detrended normalised fluxstat.errordoubleRollRoll angle of the observationdeginstr.offsetdoubleBkgBackgroundctinstr.backgrounddoubleXlocX location of target in CCDpixpos.cartesian.xdoubleYlocY location of target in CCDpixpos.cartesian.ydoubleXcntX centroid of the target PSFpixinstr.det.psfdoubleYcntY centroid of the target PSFpixinstr.det.psfdoubleContamEstimated contamination from background starsctphot.countdoubleJ/A+A/668/A117/tg022401Photometric data visit 7. Transits of planet crecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of observation (BJD)dtime.epochdoubleNFluxDetrended normalised fluxphot.fluxdoublee_NFluxError on detrended normalised fluxstat.errordoubleRollRoll angle of the observationdeginstr.offsetdoubleBkgBackgroundctinstr.backgrounddoubleXlocX location of target in CCDpixpos.cartesian.xdoubleYlocY location of target in CCDpixpos.cartesian.ydoubleXcntX centroid of the target PSFpixinstr.det.psfdoubleYcntY centroid of the target PSFpixinstr.det.psfdoubleContamEstimated contamination from background starsctphot.countdoubleJ/A+A/668/A117/tg023001Photometric data visit 8. Transits of planet brecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of observation (BJD)dtime.epochdoubleNFluxDetrended normalised fluxphot.fluxdoublee_NFluxError on detrended normalised fluxstat.errordoubleRollRoll angle of the observationdeginstr.offsetdoubleBkgBackgroundctinstr.backgrounddoubleXlocX location of target in CCDpixpos.cartesian.xdoubleYlocY location of target in CCDpixpos.cartesian.ydoubleXcntX centroid of the target PSFpixinstr.det.psfdoubleYcntY centroid of the target PSFpixinstr.det.psfdoubleContamEstimated contamination from background starsctphot.countdoubleJ/A+A/668/A117/tg024301Photometric data visit 9. Transits of planets d and ge_NFluxError on detrended normalised fluxstat.errordoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of observation (BJD)dtime.epochdoubleNFluxDetrended normalised fluxphot.fluxdoubleRollRoll angle of the observationdeginstr.offsetdoubleBkgBackgroundctinstr.backgrounddoubleXlocX location of target in CCDpixpos.cartesian.xdoubleYlocY location of target in CCDpixpos.cartesian.ydoubleXcntX centroid of the target PSFpixinstr.det.psfdoubleYcntY centroid of the target PSFpixinstr.det.psfdoubleContamEstimated contamination from background starsctphot.countdoubleJ/A+A/668/A117/tg023002Photometric data visit 10. Transits of planet brecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of observation (BJD)dtime.epochdoubleNFluxDetrended normalised fluxphot.fluxdoublee_NFluxError on detrended normalised fluxstat.errordoubleRollRoll angle of the observationdeginstr.offsetdoubleBkgBackgroundctinstr.backgrounddoubleXlocX location of target in CCDpixpos.cartesian.xdoubleYlocY location of target in CCDpixpos.cartesian.ydoubleXcntX centroid of the target PSFpixinstr.det.psfdoubleYcntY centroid of the target PSFpixinstr.det.psfdoubleContamEstimated contamination from background starsctphot.countdoubleJ/A+A/668/A117/tg022701Photometric data visit 11. Transits of planet eContamEstimated contamination from background starsctphot.countdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of observation (BJD)dtime.epochdoubleNFluxDetrended normalised fluxphot.fluxdoublee_NFluxError on detrended normalised fluxstat.errordoubleRollRoll angle of the observationdeginstr.offsetdoubleBkgBackgroundctinstr.backgrounddoubleXlocX location of target in CCDpixpos.cartesian.xdoubleYlocY location of target in CCDpixpos.cartesian.ydoubleXcntX centroid of the target PSFpixinstr.det.psfdoubleYcntY centroid of the target PSFpixinstr.det.psfdoubleJ/A+A/668/A117/tg023003Photometric data visit 12. Transits of planet brecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of observation (BJD)dtime.epochdoubleNFluxDetrended normalised fluxphot.fluxdoublee_NFluxError on detrended normalised fluxstat.errordoubleRollRoll angle of the observationdeginstr.offsetdoubleBkgBackgroundctinstr.backgrounddoubleXlocX location of target in CCDpixpos.cartesian.xdoubleYlocY location of target in CCDpixpos.cartesian.ydoubleXcntX centroid of the target PSFpixinstr.det.psfdoubleYcntY centroid of the target PSFpixinstr.det.psfdoubleContamEstimated contamination from background starsctphot.countdoubleJ/A+A/668/A117/tg022901Photometric data visit 13. Transits of planet crecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of observation (BJD)dtime.epochdoubleNFluxDetrended normalised fluxphot.fluxdoublee_NFluxError on detrended normalised fluxstat.errordoubleRollRoll angle of the observationdeginstr.offsetdoubleBkgBackgroundctinstr.backgrounddoubleXlocX location of target in CCDpixpos.cartesian.xdoubleYlocY location of target in CCDpixpos.cartesian.ydoubleXcntX centroid of the target PSFpixinstr.det.psfdoubleYcntY centroid of the target PSFpixinstr.det.psfdoubleContamEstimated contamination from background starsctphot.countdoubleJ/A+A/668/A117/tg002601Photometric data visit 14. Transits of planet frecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of observation (BJD)dtime.epochdoubleNFluxDetrended normalised fluxphot.fluxdoublee_NFluxError on detrended normalised fluxstat.errordoubleRollRoll angle of the observationdeginstr.offsetdoubleBkgBackgroundctinstr.backgrounddoubleXlocX location of target in CCDpixpos.cartesian.xdoubleYlocY location of target in CCDpixpos.cartesian.ydoubleXcntX centroid of the target PSFpixinstr.det.psfdoubleYcntY centroid of the target PSFpixinstr.det.psfdoubleContamEstimated contamination from background starsctphot.countdoubleJ/A+A/668/A117/tg002701Photometric data visit 15. Transits of planet grecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of observation (BJD)dtime.epochdoubleNFluxDetrended normalised fluxphot.fluxdoublee_NFluxError on detrended normalised fluxstat.errordoubleRollRoll angle of the observationdeginstr.offsetdoubleBkgBackgroundctinstr.backgrounddoubleXlocX location of target in CCDpixpos.cartesian.xdoubleYlocY location of target in CCDpixpos.cartesian.ydoubleXcntX centroid of the target PSFpixinstr.det.psfdoubleYcntY centroid of the target PSFpixinstr.det.psfdoubleContamEstimated contamination from background starsctphot.countdouble