J/ApJ/944/L41ivo://CDS.VizieR/J/ApJ/944/L41doi:10.26093/cds/vizier.19449041CDSFrazier R.C.Stefansson G.Mahadevan S.Yee S.W.Canas C.I.,Winn J.N.Luhn J.Dai F.Doyle L.Cegla H.Kanodia S.Robertson P.,Wisniewski J.Bender C.F.Dong J.Gupta A.F.Halverson S.Hawley S.,Hebb L.Holcomb R.Kowalski A.Libby-Roberts J.Lin A.S.J.,McElwain M.W.Ninan J.P.Petrovich C.Roy A.Schwab C.Terrien R.C.,Wright J.T.2025-05-21T20:15:01Z2025-02-28T13:21:14ZCDS support team

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

cds-question@unistra.frexoplanetsphotometryvisible-astronomyspectroscopyradial-velocityTOI-2076 b is a sub-Neptune-sized planet (R=2.39+/-0.10R_{Earth}_) that transits a young (204+/-50MYr) bright (V=9.2) K-dwarf hosting a system of three transiting planets. Using spectroscopic observations obtained with the NEID spectrograph on the WIYN 3.5m Telescope, we model the Rossiter-McLaughlin effect of TOI-2076 b, and derive a sky-projected obliquity of {lambda}=-3_-15_^+16^{deg}. Using the size of the star (R=0.775+/-0.015R_{sun}_), and the stellar rotation period (P_rot_=7.27+/-0.23days), we estimate an obliquity of psi=18_-9_^+10^{deg} ({psi}<34{deg} at 95% confidence), demonstrating that TOI-2076 b is in a well-aligned orbit. Simultaneous diffuser-assisted photometry from the 3.5m telescope at Apache Point Observatory rules out flares during the transit. TOI-2076 b joins a small but growing sample of young planets in compact multi-planet systems with well-aligned orbits, and is the fourth planet with an age <~300Myr in a multi-transiting system with an obliquity measurement. The low obliquity of TOI-2076 b and the presence of transit timing variations in the system suggest the TOI-2076 system likely formed via convergent disk migration in an initially well-aligned disk.2023ApJ...944L..41Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/L41CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/350 : Gaia EDR3 (Gaia Collaboration, 2020)VI/120 : High-resolution synthetic stellar library (Coelho+, 2005)J/ApJ/723/L223 : Radial velocities of HAT-P-11 (Winn+, 2010)J/ApJ/757/18 : RVels for 16 hot Jupiter host stars (Albrecht+, 2012)J/ApJ/834/17 : Mass & radius of planets, moons, low mass stars (Chen+, 2017)J/ApJ/836/77 : A library of high-S/N optical sp. of FGKM stars (Yee+, 2017)J/AJ/160/192 : Photometry and RVs of K2-25b with HPF (Stefansson+, 2020)J/other/ExA/51.109 : Transit KELT-11b observed by CHEOPS (Benz+, 2021)J/AJ/161/119 : The TESS-Keck survey. IV. Rvel for WASP-107 (Rubenzahl+, 2021)J/A+A/664/A156 : Young sub-Neptunes orbiting TOI-2076 LCs (Osborn+, 2022)J/AJ/165/33 : HIRES TOI-1136s planets radial velocities (Dai+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/944/L41https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/944/L41http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/944/L41https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/944/L41https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/944/L41http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/944/L41GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/944/L41/arctic*Data behind Figure 2a and 2b -- Diffuser assisted transits taken with the 3.5m telescope at Apache Point ObservatoryFmodelFull transit model with linear parameterphot.flux;meta.modelleddoubleFlux0Detrended normalized flux (1)phot.flux;arith.ratiodoubleFmodel0Detrended full transit model (2)phot.flux;arith.ratio;meta.modelleddoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Date at TDB of measurementdtime.epochdoubleFluxNormalized fluxphot.flux;arith.ratiodoublee_FluxError on Fluxstat.error;phot.flux;arith.ratiodoubleLModelModel, AIRMASS linear parameter + out of transit fluxphot.flux;meta.modelleddoubleJ/ApJ/944/L41/rvfit*Data behind Figures 2c, 2d, 2e, and 2f -- RV data taken with the NEID Spectrograph at WIYN ObservatoryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Date at TDB of measurementdtime.epochdoublervRadial velocitym/sphys.veloc;pos.barycenterfloate_rvRadial velocity errorm/sstat.error;phys.veloc;pos.barycenterfloatrv0Detrended radial velocity data (1)m/sphys.veloc;pos.barycenterfloatHalphaH-alpha index (2)spect.indexfloate_HalphaError on H-alphastat.error;spect.indexfloatcrxChromatic Index, m/s/Neper (3)spect.indexfloate_crxError on crxstat.error;spect.indexfloat