J/ApJ/867/L8ivo://CDS.VizieR/J/ApJ/867/L8doi:10.26093/cds/vizier.18679008CDSOey M.S.Jones J.D.Castro N.Zivick P.Besla G.Januszewski H.C.,Moe M.Kallivayalil N.Lennon D.J.2020-03-26T14:19:11Z2019-11-18T14:43:06ZCDS support team

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

cds-question@unistra.frob-starsmagellanic-cloudsradial-velocityspectroscopic-binary-starsWe use Gaia Data Release 2 proper motions of field OB stars from the Runaways and Isolated O-Type Star Spectroscopic Survey of the Small Magellanic Cloud (SMC) to study the kinematics of runaway stars. The data reveal that the SMC Wing has a systemic peculiar motion relative to the SMC Bar of (v_{alpha}_,v_{delta}_)=(62+/-7,-18+/-5)km/s and relative radial velocity +4.5+/-5.0km/s. This unambiguously demonstrates that these two regions are kinematically distinct: the Wing is moving away from the Bar, and towards the Large Magellanic Cloud with a 3D velocity of 64+/-10km/s. This is consistent with models for a recent, direct collision between the Clouds. We present transverse velocity distributions for our field OB stars, confirming that unbound runaways comprise on the order of half our sample, possibly more. Using eclipsing binaries and double-lined spectroscopic binaries as tracers of dynamically ejected runaways, and high-mass X-ray binaries (HMXBs) as tracers of runaways accelerated by supernova kicks, we find significant contributions from both populations. The data suggest that HMXBs have lower velocity dispersion relative to dynamically ejected binaries, consistent with the former group corresponding to less energetic supernova kicks that failed to unbind the components. Evidence suggests that our fast runaways are dominated by dynamical, rather than supernova, ejections.2018ApJ...867L...8Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/867/L8CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/236 : UBVR CCD survey of the Magellanic clouds (Massey+, 2002)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/A+A/331/949 : Wolf-Rayet and O-star runaways kinematics (Moffat+ 1998)J/AJ/127/1632 : UBVR(UIT) photometry of O and OB stars in SMC (Oey+, 2004)J/AJ/137/3358 : Speckle interferometry of massive stars (Mason+, 2009)J/other/Sci/337.444 : RV curves of Galactic massive O stars (Sana+, 2012)J/MNRAS/442/1663 : Velocities of red giants in the SMC (Dobbie+, 2014)J/ApJ/810/61 : Early-type EBs with intermediate periods (Moe+, 2015)J/A+A/586/A81 : High-mass X-ray binaries in the SMC (Haberl+, 2016)J/ApJ/817/113 : RIOTS4: spec. survey of SMC field OB stars (Lamb+, 2016)J/AcA/66/421 : Eclipsing binaries in the Magellanic System (Pawlak+, 2016)J/MNRAS/472/3887 : Kinematic data for stars in OB-associations (Melnik+, 2017)J/AJ/156/98 : Runaway stars in 30 Doradus region of LMC (Platais+, 2018)J/ApJ/868/57 : HR diagram of OB stars in the SMC (Castro+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/867/L8https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/867/L8http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/867/L8https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/867/L8https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/867/L8http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/867/L8GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/867/L8/table1 (*Kinematic data for RIOTS4 field OB stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/867/L8/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/867/L8/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/867/L8/table1?GETtext/xml+votable180.050000true10.1169489-73.54261250.0055555555555555565/8323 8326 6/33297 33298 33299 33316 33317 33319 33328https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/867/L8?format=asciidefaultJ/ApJ/867/L8/table1*Kinematic data for RIOTS4 field OB starsGroupSubgroup types (1)meta.notechare_lVelDE[1/16] Error in vloc-Dec (5)km/sstat.errorintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[107/84544] ID from Massey 2002, II/236 ; <[M2002] SMC NNNNNN> in Simbadmeta.id;meta.maininttrVel[2/287]? Transverse residual velocity (2)km/sstat.fit.residualfloatnullableltrVel[2/295]? Transverse residual local velocity (2)km/sstat.fit.residual;phys.velocfloatnullableQualFlags for asymmetry and crowding (3)meta.code.errorcharRVel[-90/242]? Residual radial velocity (2)km/sstat.fit.residual;spect.dopplerVelocfloatnullablevRA[-41/523] RA velocity (4)km/sphys.veloc;pos.eq.rainte_vRA[9/40] Error in vRA (5)km/sstat.errorintvDE[-493/-204] Dec velocity (4)km/sphys.veloc;pos.eq.decinte_vDE[7/29] Error vDec (5)km/sstat.errorintlVelRA[166/415] RA local velocity (4)km/sphys.velocinte_lVelRA[2/24] Error in vloc-RA (5)km/sstat.errorintlVelDE[-425/-325] Dec local velocity (4)km/sphys.velocintRIOTS4Display data from RIOTS4 (Lamb+, 2016, J/ApJ/817/113)meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main