J/A+A/642/A63ivo://CDS.VizieR/J/A+A/642/A63doi:10.26093/cds/vizier.36420063CDSZasche P.Henzl Z.Lehmann H.Pepper J.Powell B.P.Kostov V.B.,Barclay T.Wolf M.Kucakova H.Uhlar R.Masek M.Palafouta S.,Gazeas K.Stassun K.G.Gaudi B.S.Rodriguez J.E.Stevens D.J.2021-09-08T07:25:39Z2020-10-07T08:44:14ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsradial-velocityWe report the discovery of the relatively bright (V=10.5mag), doubly eclipsing 2+2 quadruple system CzeV1731. This is the third known system of its kind, in which the masses are determined for all four stars and both the inner and outer orbits are characterized. The inner eclipsing binaries are well-detached systems moving on circular orbits: pair A with period P_A_=4.10843d and pair B with P_B_=4.67552d. The inner binaries contain very similar components (q~1.0), making the whole system a so-called double twin. The stars in pair B have slightly larger luminosities and masses and pair A shows deeper eclipses. All four components are main-sequence stars of F/G spectral type. The mutual orbit of the two pairs around the system barycenter has a period of about 33 yr and an eccentricity of about 0.38. However, further observations are needed to reveal the overall architecture of the whole system, including the mutual inclinations of all orbits. This is a promising target for interferometry to detect the double at about 59mas and {DELTA}Mbol<1mag.2020A&A...642A..63Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/642/A63CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/642/A63https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/642/A63http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/642/A63https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/642/A63https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/642/A63http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/642/A63GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/642/A63/etvTimes of eclipses of both pairsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCompName of the component (Pair A or Pair B)meta.id;meta.maincharBJDBarycentric Julian Date of eclipsedtime.epochdoublee_BJDError on BJDdstat.errordoubleObsObservatory namemeta.id;instr.obstycharJ/A+A/642/A63/rvRadial velocities of both pairsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCompName of the component (Pair A or Pair B)meta.id;meta.maincharP/SPrimary or secondary component (Pri or Sec)meta.codecharBJDBarycentric Julian Date of observationdtime.epochdoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricfloate_RVError on RVkm/sstat.errorfloatObsObservatory namemeta.id;instr.obstychar