J/AJ/166/123ivo://CDS.VizieR/J/AJ/166/123doi:10.26093/cds/vizier.51660123CDSKorolik M.Roettenbacher R.M.Fischer D.A.Kane S.R.Perkins J.M.,Monnier J.D.Davies C.L.Kraus S.Le Bouquin J.-B.Anugu N.,Gardner T.Lanthermann C.Schaefer G.H.Setterholm B.Brewer J.M.,Llama J.Zhao L.L.Szymkowiak A.E.Henry G.W.2024-11-06T20:17:36Z2024-04-05T09:30:14ZCDS support team

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

cds-question@unistra.frhigh-velocity-starsg-starsvisible-astronomyspectroscopyradial-velocityTo accurately characterize the planets a star may be hosting, stellar parameters must first be well determined. {tau}Ceti is a nearby solar analog and often a target for exoplanet searches. Uncertainties in the observed rotational velocities have made constraining {tau}Ceti's inclination difficult. For planet candidates from radial velocity (RV) observations, this leads to substantial uncertainties in the planetary masses, as only the minimum mass (msini) can be constrained with RV. In this paper, we used new long-baseline optical interferometric data from the CHARA Array with the MIRC-X beam combiner and extreme precision spectroscopic data from the Lowell Discovery Telescope with EXPRES to improve constraints on the stellar parameters of {tau}Ceti. Additional archival data were obtained from a Tennessee State University Automatic Photometric Telescope and the Mount Wilson Observatory HK project. These new and archival data sets led to improved stellar parameter determinations, including a limb-darkened angular diameter of 2.019{+/-}0.012mas and rotation period of 46{+/-}4days. By combining parameters from our data sets, we obtained an estimate for the stellar inclination of 7{deg}{+/-}7{deg}. This nearly pole-on orientation has implications for the previously reported exoplanets. An analysis of the system dynamics suggests that the planetary architecture described by Feng et al. may not retain long-term stability for low orbital inclinations. Additionally, the inclination of {tau}Ceti reveals a misalignment between the inclinations of the stellar rotation axis and the previously measured debris disk rotation axis (idisk=35{deg}{+/-}10{deg}).2023AJ....166..123Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/166/123CatalogResearchIsServedByTAP VizieR generic servicerelated-toIII/150 : Perkins Revised MK Types for the Cooler Stars (Keenan+ 1989)III/159 : Ca II H and K Measurements Made at MWO (Duncan+ 1991)J/ApJ/457/L99 : 25yr CaII-HK observations of FK nearby stars (Baliunas+, 1996)J/A+A/348/897 : Ages of main-sequence stars (Lachaume+, 1999)J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)J/ApJ/771/40 : Main-sequence A, F, G, & K stars photometry (Boyajian+, 2013)J/A+A/582/A81 : Gaia FGK benchmark stars; abundances (Jofre+, 2015)J/ApJ/803/90 : {tau} Cet chemical composition (Pagano+, 2015)J/ApJS/225/32 : Extended abundance analysis of cool stars (Brewer+, 2016)J/A+A/597/A137 : HD 123999 and Alpha Cen A and B OIFITS files (Kervella+, 2017)J/A+A/623/A72 : Bin of Hipparcos stars from Gaia pm anomaly (Kervella+, 2019)J/AJ/160/24 : Circumstellar dust of 104 stars with GPIES (Esposito+, 2020)J/AJ/159/187 : 1st RVs with the EXPRES spectrograph 51Peg (Petersburg+, 2020)J/AJ/163/183 : S-value for 59 Sun-like starswith HIRES and HKP (Baum+, 2022)J/AJ/164/184 : ARMADA. II. Bin astrometry & radial velocity (Gardner+, 2022)J/AJ/163/171 : The EXPRES Stellar Signals Project. II. RVel (Zhao+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/166/123https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/166/123http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/166/123https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/166/123https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/166/123http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/166/123GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/166/123/table2EXPRES radial velocity datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[58710/59505] Modified Julian date, JD-2400000.5dtime.epochdoubleRVel[-4.94/4.02] Radial velocitym/sspect.dopplerVelocfloate_RVel[0.3/0.6] The 1-sigma uncertainty in RVelm/sstat.error;spect.dopplerVelocfloat