J/A+A/515/A81ivo://CDS.VizieR/J/A+A/515/A81doi:10.26093/cds/vizier.35150081CDSOlah K.Korhonen H.Vida K.Ilyin I.Dall T.H.Jarvinen S.P.,Jurcsik J.Andersen M.I.Djupvik A.A.Pursimo T.Moor A.Datson J.,Karjalainen R.Liimets T.Kubat J.Kawka A.2017-07-06T06:25:35Z2010-06-11T09:58:37ZCDS support team

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

cds-question@unistra.frmultiple-starsg-starsinfrared-photometryvisible-astronomybroad-band-photometrykron-cousins-photometryWe present BV(RI)c and JHKs photometry and low- and high-resolution spectroscopy of the 11th mag G-type star TYC 2627-638-1. Our investigation reveals that the target is separated into two young, early-G-type main-sequence (or late pre-main-sequence) stars, which are most probably bound and form a wide binary system. A substellar body orbits the brighter component as implied by radial velocity variations. The brighter component possibly also has a faint, later type stellar companion. Both components of the wide binary have clear emission cores in the CaII H&K lines and filled-in Halpha absorption, indicating that both stars are chromospherically active. Our photometric time series reveals clear but only a few hundredths of a magnitude amplitude rotational modulation, which is most likely due to cool starspots. Two distinct periods, near 3.5 and 3.7-days, are found in the brightness variations. Photometry obtained separately of the two components of the wide binary show that these periodicities belong to the brighter star. The fainter component shows a much slower light variation of about 0.3mag. amplitude. In addition, long-term changes in the brightness of both stars are seen. The spectral energy distribution shows a strong near-infrared excess in the fainter component of the wide binary.2010A&A...515A..81Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/515/A81CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/239 : The Hipparcos and Tycho Catalogues (ESA 1997)J/MNRAS/391/164 : MW Lyr BV(RI)c light curves (Jurcsik+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/515/A81https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/515/A81http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/515/A81https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/515/A81https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/515/A81http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/515/A81GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/A+A/515/A81/ab-bviBVIc magnitudes of TYC 2627-638-1 (A+B components together), with the 60cm telescoperecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoubleDBmag? Differential Johnson B magnitudemagphot.mag;arith.difffloatnullableDVmag? Differential Johnson B magnitudemagphot.mag;arith.difffloatnullableDRcmag? Differential Cousins R magnitudemagphot.mag;arith.difffloatnullableDIcmag? Differential Cousins I magnitudemagphot.mag;arith.difffloatnullableJ/A+A/515/A81/ab-rRc magnitudes of TYC 2627-638-1 (A+B components together), with the 60cm telescoperecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoubleDBmag? Differential Johnson B magnitudemagphot.mag;arith.difffloatnullableDVmag? Differential Johnson B magnitudemagphot.mag;arith.difffloatnullableDRcmag? Differential Cousins R magnitudemagphot.mag;arith.difffloatnullableDIcmag? Differential Cousins I magnitudemagphot.mag;arith.difffloatnullableJ/A+A/515/A81/ab-bvriBV(RI)c magnitudes of TYC 2627-638-1 (A+B components together), with the 1m telescoperecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoubleDBmag? Differential Johnson B magnitudemagphot.mag;arith.difffloatnullableDVmag? Differential Johnson B magnitudemagphot.mag;arith.difffloatnullableDRcmag? Differential Cousins R magnitudemagphot.mag;arith.difffloatnullableDIcmag? Differential Cousins I magnitudemagphot.mag;arith.difffloatnullableJ/A+A/515/A81/a-bvriBV(RI)c magnitudes of TYC 2627-638-1A component separately, with the 1m telescoperecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoubleDBmag? Differential Johnson B magnitudemagphot.mag;arith.difffloatnullableDVmag? Differential Johnson B magnitudemagphot.mag;arith.difffloatnullableDRcmag? Differential Cousins R magnitudemagphot.mag;arith.difffloatnullableDIcmag? Differential Cousins I magnitudemagphot.mag;arith.difffloatnullableJ/A+A/515/A81/b-bvriBV(RI)c magnitudes of TYC 2627-638-1B component separately, with the 1m telescoperecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoubleDBmag? Differential Johnson B magnitudemagphot.mag;arith.difffloatnullableDVmag? Differential Johnson B magnitudemagphot.mag;arith.difffloatnullableDRcmag? Differential Cousins R magnitudemagphot.mag;arith.difffloatnullableDIcmag? Differential Cousins I magnitudemagphot.mag;arith.difffloatnullable