Double & multiple star systems from GaiaDR2 J/AJ/157/78 ivo://CDS.VizieR/J/AJ/157/78 doi:10.26093/cds/vizier.51570078 CDS Jimenez-Esteban F.M. Solano E. Rodrigo C. 2019-11-12T13:26:36Z 2019-08-02T08:53:30Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr multiple-stars radial-velocity visible-astronomy trigonometric-parallax proper-motions photometry effective-temperature extinction stellar-masses Binary and multiple stars have long provided an effective empirical method of testing stellar formation and evolution theories. In particular, the existence of wide binary systems (separations >20000 au) is particularly challenging to binary formation models as their physical separations are beyond the typical size of a collapsing cloud core (~5000-10000 au). We mined the recently published Gaia-DR2 catalog (Cat. I/345) to identify bright comoving systems in the five-dimensional space (sky position, parallax, and proper motion). We identified 3741 comoving binary and multiple stellar candidate systems, out of which 575 have compatible radial velocities for all the members of the system. The candidate systems have separations between ~400 and 500000 au. We used the analysis tools of the Virtual Observatory to characterize the comoving system members and to assess their reliability. The comparison with previous comoving systems catalogs obtained from TGAS showed that these catalogs contain a large number of false systems. In addition, we were not able to confirm the ultra-wide binary population presented in these catalogs. The robustness of our methodology is demonstrated by the identification of well known comoving star clusters and by the low contamination rate for comoving binary systems with projected physical separations <50000 au. These last constitute a reliable sample for further studies. The catalog is available online at the Spanish Virtual Observatory portal (http://svo2.cab.inta-csic.es/vocats/v2/comovingGaiaDR2/). 2019AJ....157...78J https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/157/78 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to I/259 : The Tycho-2 Catalogue (Hog+ 2000) I/276 : Tycho Double Star Catalogue (TDSC) (Fabricius+ 2002) III/279 : RAVE 5th data release (Kunder+, 2017) I/345 : Gaia DR2 (Gaia Collaboration, 2018) J/A+A/492/277 : Analysis of Collinder 69 stars with VOSA (Bayo+, 2008) J/AJ/153/257 : Comoving stars in Gaia DR1 (Oh+, 2017) J/MNRAS/472/675 : Wide binaries in Tycho-Gaia: search method (Andrews+, 2017) http://svo2.cab.inta-csic.es/vocats/v2/comovingGaiaDR2/ : The SVO archive of https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/157/78 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/157/78 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/157/78 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/157/78 https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/157/78 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/157/78 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/AJ/157/78/table2 (Double and multiple star systems from Gaia-DR2) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/157/78/table2? https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/157/78/table2? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/157/78/table2? GET text/xml+votable 180.0 50000 true 175.841571594486 -5.219056387061501 0.005555555555555556 4/2370 5/482 784 3436 3514 3566 3638 3650 3657 3661 4122 5388 5411 5420 5514 5726 5909 6518 7120 7180 7201 7258 7277 7674 7767 7953 7966 9332 9333 9337 9341 9398 9419 9425 9430 9471 9476 9486 9505 9808 9813 9820 9846 9847 9924 9940 9943 9966 9967 9970 9973 10361 10389 10417 10442 10552 10605 10621 10755 6/53 55 62 314 336 357 399 451 457 461 462 463 472 474 475 484 485 496 497 499 511 544 600 672 720 739 796 874 893 930 950 1007 1023 1025 1032 1033 1035 1079 1096 1107 1114 1115 1116 1133 1197 1208 1213 1224 1244 1270 1271 1276 1277 1279 1289 1296 1297 1301 1302 1304 1308 1313 1329 1333 1337 1338 1339 1345 1346 1347 1348 1350 1351 1352 1354 1372 1374 1377 1382 1383 1386 1388 1391 1394 1408 1414 1423 1427 1431 1433 1434 1436 1445 1447 1450 1456 1457 1459 1461 1464 1466 1472 1482 1525 1527 1533 1536 1538 1551 1554 1556 1557 1572 1576 1625 1627 1656 1660 1661 1670 1679 1684 1687 1693 1715 1717 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https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/157/78?format=ascii Optical default J/AJ/157/78/table2 Double and multiple star systems from Gaia-DR2 recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int RAJ2000 Right Ascension in decimal degrees (J2000) deg pos.eq.ra;meta.main DEJ2000 Declination in decimal degrees (J2000) deg pos.eq.dec;meta.main RAGdeg Gaia-DR2 Right Ascension in decimal degrees (ICRS) at Ep=2015.5 deg pos.eq.ra DEGdeg Gaia-DR2 Declination in decimal degrees (ICRS) at Ep=2015.5 deg pos.eq.dec GaiaDR2 Gaia-DR2 identifier (Cat. I/345) meta.id Tycho2 Tycho-2 identifier (Cat. I/259) meta.id char Name Simbad name meta.id;meta.main char GroupID [1/3741] ID for match group meta.id int GroupSize [2/94] Number of rows in match group meta.number int Sep1 [1.78768/9162.51]? Angular separation in the plane of the sky arcsec pos.angDistance;obs.field double nullable Sep2 [405.023/2.29329e+06]? Projected physical separation in the plane of the sky AU pos.angDistance double nullable RV [-102.39/125.56]? Gaia-DR2 radial velocity km/s phys.veloc;pos.heliocentric float nullable e_RV [0.11/19.9]? Error on RV km/s stat.error float nullable Plx [0.3672/22.8692] Gaia-DR2 parallax mas pos.parallax float e_Plx [0.0286166/0.950632] Estimated Gaia-DR2 parallax total error mas stat.error;pos.parallax double pmRA [-222.445/122.917] Gaia-DR2 proper motion in RA corrected for the inertial spin (pmRA*cosDE) mas/yr pos.pm;pos.eq.ra double e_pmRA [0.0476868/1.58815] Error on pmRA mas/yr stat.error;pos.pm;pos.eq.ra double pmDE [-135.99/152.688] Gaia-DR2 proper motion in DE corrected for the inertial spin mas/yr pos.pm;pos.eq.dec double e_pmDE [0.0471825/1.21189] Error on pmDE mas/yr stat.error;pos.pm;pos.eq.dec double Gmag [3.69949/12.9972] Gaia-DR2 G band mean magnitude mag phot.mag;em.opt double BPmag [3.82579/13.3007] Gaia-DR2 G_BP_ band mean magnitude mag phot.mag;em.opt.B double RPmag [3.15896/12.837] Gaia-DR2 G_RP_ band mean magnitude mag phot.mag;em.opt.R double RUWE [0.606624/1.39958] Gaia-DR2 re-normalized unit weight error stat.error double HRV [-717.138/696.16]? Heliocentric radial velocity from RAVE (Cat. III/279) km/s spect.dopplerVeloc;pos.heliocentric double nullable e_HRV [0.438/77.328]? Error on HRV km/s stat.error float nullable Class [DG] Dwarf/Giant classification meta.code.class char Teff [2500/40000]? Effective temperature of the model in Kelvin from VOSA (Bayo et al. 2008, J/A+A/492/277) K phys.temperature.effective;meta.modelled int nullable e_Teff [50/1388.96]? Error on Teff K stat.error;phys.temperature.effective double nullable Av [-0.4/5.61]? Visual extinction used in VOSA mag instr.setup double nullable Mass [0.540657/12.4077]? Mass solMass phys.mass double nullable e_Mass [0.00110388/0.463406]? Error on Mass solMass stat.error;phys.mass double nullable U [1.44084e+33/7.09831e+36]? Binding energy J phys.energy double nullable e_U [4.55197e+31/2.61545e+35]? Error on U J stat.error;pos.cartesian.x double nullable tD [0.574761/1052.92]? Dissipation lifetime Gyr time.epoch double nullable e_tD [0.0130166/42.8812]? Error on tD Gyr stat.error double nullable tMS [0.0184405/46.526]? Main-sequence lifetime Gyr time.epoch double nullable e_tMS [0.000769014/4.04013]? Error on tMS Gyr stat.error double nullable ECAC [0.0108108/3.07692]? Expected chance alignment counterparts stat.fit.param double nullable Simbad Simbad column added by the CDS meta.ref.url char