J/AJ/156/144ivo://CDS.VizieR/J/AJ/156/144doi:10.26093/cds/vizier.51560144CDSFarrington C.D.Fekel F.C.Schaefer G.H.ten Brummelaar T.A.2019-03-26T11:40:34Z2019-03-19T06:34:43ZCDS support team

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

cds-question@unistra.frorbitsinterferometryspectroscopyAfter an 11-year observing campaign, we present the combined visual-spectroscopic orbit of the formerly unremarkable bright star HR 7345 (HD 181655, HIP 94981, GJ 754.2). Using the Separated Fringe Packet method with the CHARA Array, we were able to determine a difficult-to-complete orbital period of 331.609+/-0.004 days. The 11-month period causes the system to be hidden from interferometric view behind the Sun for three years at a time. Due to the high-eccentricity orbit of about 90% of a year, after 2018 January the periastron phase will not be observable again until late 2021. Hindered by its extremely high eccentricity of 0.9322+/-0.0001, the double-lined spectroscopic phase of HR 7345 is observable for 15 days. Such a high eccentricity for HR 7345 places it among the most eccentric systems in catalogs of both visual and spectroscopic orbits. For this system, we determine nearly identical component masses of 0.941+/-0.076 M_{sun}_ and 0.926+/-0.075 M_{sun}_ as well as an orbital parallax of 41.08+/-0.77 mas.2018AJ....156..144Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/156/144CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/sb9 : SB9: 9th Catalogue of Spectroscopic Binary OrbitsJ/ApJ/683/424 : CHARA observations of 3 late-type stars (Boyajian+, 2008)J/ApJ/745/24 : A search for new companions with CHARA (Raghavan+, 2012)J/AJ/148/48 : CHARA obs. of omega And, HD 178911, xi Cep (Farrington+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/156/144https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/156/144http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/156/144https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/156/144https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/156/144http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/156/144GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/AJ/156/144/table2Spectroscopic observations for system HR 7345recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date (HJD-2400000)dtime.epochdoubleK1[-46.3/2.21] Primary amplitudekm/ssrc.var.amplitudefloatw_K1[0/1] Weight on K1stat.weightfloatK2[4.48/50.5]? Secondary amplitudekm/ssrc.var.amplitudefloatnullablew_K2[0/1]? Weight on K2stat.weightfloatnullableJ/AJ/156/144/table1Visual binary measurements for Separated Fringe Packet (SFP) system HR 7345recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD1? Heliocentric Julian Date from 1D measurement (HJD-2400000)dtime.epochdoublenullableB[138.5/330.66]? Baseline length of 1D measurementminstr.baselinefloatnullablef_rho1[<=] Limit flag on rho1meta.codecharrho1[2.92/91.14]? Fringe separation of 1D measurement {rho}maspos.angDistancefloatnullabletheta1[0.17/359.39]? Position angle of baseline of 1D measurement {theta}degpos.posAngfloatnullablen_theta1[1] Flag on theta1 (1)meta.notecharHJD2? Heliocentric Julian Date of 2D calculationsdtime.epochdoublenullableJY? Calculated Julian Year of 2D calculationsyrtime.epoch;meta.modelleddoublenullablerho2[3.4/92.88]? Companion separation of 2D calculations (2)maspos.angDistancefloatnullablee_rho2[0.04/11.06]? Uncertainty in rho2 (2)masstat.errorfloatnullabletheta2[2.73/359.5]? Companion position angle of 2D calculations (2)degpos.posAngfloatnullablee_theta2[0.04/22.89]? Uncertainty in theta2 (2)degstat.errorfloatnullable