J/AJ/166/136ivo://CDS.VizieR/J/AJ/166/136doi:10.26093/cds/vizier.51660136CDSde Beurs Z.L.de Wit J.Venner A.Berardo D.Bryan J.Winn J.N.,Fulton B.J.Howard A.W.2024-11-06T20:17:43Z2024-04-19T07:19:23ZCDS support team

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

cds-question@unistra.frexoplanetsvisible-astronomyspectroscopyradial-velocityOne possible formation mechanism for Hot Jupiters is that high-eccentricity gas giants experience tidal interactions with their host star that cause them to lose orbital energy and migrate inwards. We study these types of tidal interactions in an eccentric Hot Jupiter called HAT-P-2b, which is a system where a long-period companion has been suggested and hints of orbital evolution were detected. Using 5 additional years of radial velocity (RV) measurements, we further investigate these phenomena. We investigated the long-period companion by jointly fitting RVs and Hipparcos-Gaia astrometry and confirmed this long-period companion, significantly narrowed down the range of possible periods (P_2_=8500_-1500_^+2600^days), and determined that it must be a substellar object (10.7_-2.2_^+5.2^Mj). We also developed a modular pipeline to simultaneously model rapid orbital evolution and the long-period companion. We find that the rate and significance of evolution are highly dependent on the long-period companion modeling choices. In some cases the orbital rates of change reached d}/dt=3.28_-1.72_^+1.75^x10^-3^/yr, d{omega}/dt=1.12{deg}{+/-}0.22deg/yr, which corresponds to a ~321yr apsidal precession period. In other cases, the data is consistent with de/dt=7.67{+/-}18.6x10^-4^/yr, d{omega}/dt=0.76{deg}{+/-}0.24{deg}/yr. The most rapid changes found are significantly larger than the expected relativistic precession rate and could be caused by transient tidal planet-star interactions. To definitively determine the magnitude and significance of potential orbital evolution in HAT-P-2b, we recommend further monitoring with RVs and precise transit and eclipse timings.2023AJ....166..136Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/166/136CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/692/L9 : Tidal evolution of trans extrasolar planets (Levrard+, 2009)J/ApJ/757/18 : Radial velocities 16 hot Jupiter host stars (Albrecht+, 2012)J/ApJ/785/126 : HIRES radial velocity measurements (Knutson+, 2014)J/A+A/602/A107 : 231 transiting planets eccentricity and mass (Bonomo+, 2017)J/AJ/156/213 : Properties N2K stars & new gas giant companions (Ment+, 2018)J/AJ/158/181 : Radial velocities & S-index values for HR 5183 (Blunt+, 2019)J/ApJS/254/42 : Hipparcos-Gaia (EDR3) Catalog of Accelerations (Brandt, 2021)J/AJ/163/273 : Radial velocity of HD 83443 (Errico+, 2022)J/ApJS/259/62 : TESS transit timing of hot Jupiters (Ivshina+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/166/136https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/166/136http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/166/136https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/166/136https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/166/136http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/166/136GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/166/136/table4Summary of radial velocity measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJD[3981/9093] Barycentric Julian Date; BJD-2450000dtime.epochdoubleRVel[-1128/827] Radial velocitym/sspect.dopplerVelocdoublee_RVel[1/13] Uncertainty in RVelm/sstat.error;spect.dopplerVelocfloatInstInstrument used; HARPS or HIRESinstr.setupchar