J/other/RMxAA/53ivo://CDS.VizieR/J/other/RMxAA/53.439CDSMakarov V.V.2017-11-10T06:45:28Z2017-11-10T07:42:50ZCDS support team

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

cds-question@unistra.frmultiple-starswhite-dwarf-starsultraviolet-astronomyAccurate parallaxes from Gaia DR1 (TGAS) are combined with GALEX visual Nuv magnitudes to produce absolute MNUV magnitudes and an ultraviolet HR diagram for a large sample of astrometric stars. A functional fit is derived of the lower envelope main sequence of the nearest 1403 stars (distance <40pc), which should be reddening-free. Using this empirical fit, 50 nearby stars are selected with significant Nuv excess. These are predominantly late K and early M dwarfs, often associated with X-ray sources, and showing other manifestations of magnetic activity. The sample may include systems with hidden white dwarfs, stars younger than the Pleiades, or, most likely, tight interacting binaries of the BY Dra-type. A separate collection of 40 stars with precise trigonometric parallaxes and Nuv-G colors bluer than 2mag is presented. It includes several known novae, white dwarfs, and binaries with hot subdwarf (sdOB) components, but most remain unexplored.2017RMxAA..53..439Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/RMxAA/53.439CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/337 : Gaia DR1 (Gaia Collaboration, 2016)II/312 : GALEX-DR5 (GR5) sources from AIS and MIS (Bianchi+ 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/RMxAA/53.439https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/RMxAA/53.439http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/RMxAA/53.439https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/RMxAA/53.439https://vizier.iucaa.in/viz-bin/votable?-source=J/other/RMxAA/53.439http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/RMxAA/53.439GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/RMxAA/53.439/table1 (Nearby Dwarfs (distance <40pc) with excess Nuv luminosity)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/RMxAA/53.439/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/other/RMxAA/53.439/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/RMxAA/53.439/table1?GETtext/xml+votable180.050000true51.02823.78450.005555555555555556Cone search capability for table J/other/RMxAA/53.439/table2 (Gaia stars with significant parallaxes and NUV-G colors less than 2mag)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/RMxAA/53.439/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/other/RMxAA/53.439/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/RMxAA/53.439/table2?GETtext/xml+votable180.050000true57.345327.22660.0055555555555555566/447 502 722 1162 2170 2321 2597 2660 2661 4956 5932 5985 5998 6060 6201 6879 6944 7107 7391 7528 7579 7884 7928 8100 8627 9230 9954 10173 12076 12621 13620 15078 15999 16052 16825 17058 17099 17124 17288 17363 17570 17790 18448 20215 20394 20422 21016 21180 22549 22753 23895 25793 28341 31235 31423 31689 32500 32655 33975 34655 35150 35464 35707 36057 36490 36492 36609 37041 37457 38135 38754 38865 38919 39612 40359 43970 45805 46073 46179 46532 46639 46846 46922 47475 47698 48211 48274 485591.9867573869263685e-19 1.4134638842407062e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/RMxAA/53.439?format=asciiUVdefaultJ/other/RMxAA/53.439/table1Nearby Dwarfs (distance <40pc) with excess Nuv luminositySimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSRight ascension (ICRS) at epoch 2015.0degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at epoch 2015.0degpos.eq.dec;meta.mainHIP? Hipparcos IDmeta.idintnullableTYC2Tycho-2 IDmeta.idcharplxGaia parallaxmaspos.parallax.trigfloate_plxGaia parallax errormasstat.error;pos.parallaxfloatGmagGaia G magnitudemagphot.mag;em.opt.BfloatFUV? GALEX FUV magnitudemagphot.mag;em.UV.100-200nmfloatnullableNUVGALEX NUV magnitudemagphot.mag;em.UVfloate_FUV? GALEX FUV magnitude errormagstat.errorfloatnullablee_NUVGALEX NUV magnitude errormagstat.errorfloatTGASDisplay the Gaia TGAS data (Gaia Collaboration, 2016, Cat. I/337)meta.ref.urlcharGALEXDisplay the GALEX-DR5 data (Bianchi et al., 2011, Cat. II/312)meta.ref.urlcharJ/other/RMxAA/53.439/table2Gaia stars with significant parallaxes and NUV-G colors less than 2magSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSRight ascension (ICRS) at epoch 2015.0degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at epoch 2015.0degpos.eq.dec;meta.mainHIP? Hipparcos IDmeta.idintnullableTYC2Tycho-2 IDmeta.idcharplxGaia parallaxmaspos.parallax.trigfloate_plxGaia parallax errormasstat.error;pos.parallaxfloatGmagGaia G magnitudemagphot.mag;em.opt.BfloatFUV? GALEX FUV magnitudemagphot.mag;em.UV.100-200nmfloatnullableNUVGALEX NUV magnitudemagphot.mag;em.UVfloate_FUV? GALEX FUV magnitude errormagstat.errorfloatnullablee_NUVGALEX NUV magnitude errormagstat.errorfloatTGASDisplay the Gaia TGAS data (Gaia Collaboration, 2016, Cat. I/337)meta.ref.urlcharGALEXDisplay the GALEX-DR5 data (Bianchi et al., 2011, Cat. II/312)meta.ref.urlchar