J/A+A/712/A147ivo://CDS.VizieR/J/A+A/712/A147CDSMancini L.Naponiello L.Damasso M.Biazzo K.Bonomo A.S.Lanza A.F.,Lillo-Box J.Pinamonti M.Cosentino R.Bignamini A.Boschin W.,Fiorenzano A.Giacobbe P.Manni F.Rainer M.Scandariato G.Sozzetti A.2026-08-12T08:07:02Z2026-08-12T09:06:26ZCDS support team

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

cds-question@unistra.frk-starsradial-velocityvisible-astronomyHot Neptunes are close-in exoplanets that occupy a sparsely populated region of parameter space known as the "hot-Neptune desert". Their presence in this extreme environment is puzzling as it implies a complex history involving intense stellar radiation, atmospheric loss, and unique migration patterns, different from Neptunes at larger orbital periods. We are running an observational programme conceived to enlarge the number of close-in Neptune-sized planets, with well-measured physical and orbital parameters, with the aim of contributing to obtaining a statistically significant sample needed to clarify what the formation and migration pathways of this class of exoplanets are. We used currently available TESS photometry, along with new (HARPS-N) and archival (HIRES) high-precision radial-velocity measurements, to review the main properties of the planetary systems TOI-1272 and TOI-1694 by means of joint-fit analyses that, in the case of TOI-1272, included Gaussian-process regressions for carefully modelling stellar activity. Our final estimates of the parameters of the two systems are consistent with previous measurements but have smaller uncertainties. We identified the radial-velocity variation of TOI-1272 found in the HIRES data as stellar activity rather than planetary in nature and, therefore, rejected the non-transiting planet TOI-1272c. This opens up the possibility that TOI-1272b's eccentricity is the result of high-eccentricity migration. The larger number of data at our disposal also allowed us to point out that both TOI-1694b and TOI-1694c move on slightly eccentric orbits. The current orbital architecture of TOI-1694 suggests a history of migration driven by both disc and dynamical interactions.2026A&A...712A.147Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/712/A147CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/712/A147https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/712/A147http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/712/A147https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/712/A147https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/712/A147http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/712/A147GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/712/A147/toi-1272Radial velocities of TOI-1272recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian date for the midpoint of observation, TDBdtime.epochdoubleTexpExposure timestime.duration;obs.exposureintRVRadial velocitym/sphys.veloc;pos.heliocentricdoublee_RVUncertainty of the radial velocity measurementm/sstat.errorfloatS/NSignal to noise ratio of the measurementstat.snrfloatFWHMFWHM of the cross-correlation functionm/sphys.angSizefloate_FWHMUncertainty of the FWHMm/sstat.error;phys.angSizefloatContrastContrast of the cross-correlation functionm/sphot.flux;arith.ratiofloate_ContrastUncertainty of the Contrastm/sstat.errorfloatBISBisector span of the cross-correlation functionm/sphys.velocfloate_BISUncertainty of the bisector spanm/sstat.errorfloatHalphaHalpha indexspect.indexfloate_HalphaUncertainty of the Halpha indexstat.error;spect.linefloatlog(R'HK)log(R'_HK) indexphot.flux;arith.ratiodoublee_log(R'HK)Error of the log(R'_HK) indexstat.errorfloatJ/A+A/712/A147/toi-1694Radial velocities of TOI-1694e_ContrastUncertainty of the Contrastm/sstat.errorfloatBISBisector span of the cross-correlation functionm/sphys.velocfloate_BISUncertainty of the bisector spanm/sstat.errorfloatHalphaHalpha indexspect.indexfloate_HalphaUncertainty of the Halpha indexstat.error;spect.linefloatlog(R'HK)log(R'_HK) indexphot.flux;arith.ratiodoublee_log(R'HK)Error of the log(R'_HK) indexstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian date for the midpoint of observation, TDBdtime.epochdoubleTexpExposure timestime.duration;obs.exposureintRVRadial velocitym/sphys.veloc;pos.heliocentricdoublee_RVUncertainty of the radial velocity measurementm/sstat.errorfloatS/NSignal to noise ratio of the measurementstat.snrfloatFWHMFWHM of the cross-correlation functionm/sphys.angSizefloate_FWHMUncertainty of the FWHMm/sstat.error;phys.angSizefloatContrastContrast of the cross-correlation functionm/sphot.flux;arith.ratiofloat