J/ApJ/903/43ivo://CDS.VizieR/J/ApJ/903/43doi:10.26093/cds/vizier.19030043CDSDorigo Jones J.Oey M.S.Paggeot K.Castro N.Moe M.2023-03-10T06:16:54Z2022-02-16T12:20:24ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsob-starsmorgan-keenan-classificationstellar-masseseffective-temperatureRunaway OB stars are ejected from their parent clusters via two mechanisms, both involving multiple stars: the dynamical ejection scenario (DES) and the binary supernova scenario (BSS). We constrain the relative contributions from these two ejection mechanisms in the Small Magellanic Cloud (SMC) using data for 304 field OB stars from the spatially complete Runaways and Isolated O-Type Star Spectroscopic Survey of the SMC (RIOTS4). We obtain stellar masses and projected rotational velocities v_r_sini for the sample using RIOTS4 spectra, and we use transverse velocities v_loc_ from Gaia DR2 proper motions. Kinematic analyses of the masses, v_r_sini, noncompact binaries, high-mass X-ray binaries, and Oe/Be stars largely support predictions for the statistical properties of the DES and BSS populations. We find that dynamical ejections dominate over supernova ejections by a factor of ~2-3 in the SMC, and our results suggest a high frequency of DES runaways and binary ejections. Objects seen as BSS runaways also include two-step ejections of binaries that are reaccelerated by supernova kicks. We find that two-step runaways likely dominate the BSS runaway population. Our results further imply that any contribution from in situ field OB star formation is small. Finally, our data strongly support the post-mass-transfer model for the origin of classical Oe/Be stars, providing a simple explanation for the bimodality in the v_r_sini distribution and high, near-critical, Oe/Be rotation velocities. The close correspondence of Oe/Be stars with BSS predictions implies that the emission-line disks are long-lived.2020ApJ...903...43Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/903/43CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/236 : UBVR CCD survey of the Magellanic clouds (Massey+, 2002)J/AJ/123/855 : Magellanic Clouds Photometric Survey: SMC (Zaritsky+, 2002)J/AJ/127/1632 : UBVR(UIT) photometry of O and OB stars in SMC (Oey+, 2004)J/ApJS/161/118 : byH{alpha} photometry in open clusters (McSwain+, 2005)J/AJ/133/1092 : vsini of B0-B3 stars in 7 young clusters (Wolff+, 2007)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/ApJ/763/101 : Massive field OB stars in the SMC (Lamb+, 2013)J/AcA/63/323 : OGLE-III SMC eclipsing binary stars (Pawlak+, 2013)J/A+A/562/A135 : Northern Galactic OB stars vsini (Simon-Diaz+, 2014)J/A+A/564/A40 : VFTS. O-type stellar content of 30 Dor (Walborn+, 2014)J/A+A/586/A81 : High-mass X-ray binaries in the SMC (Haberl+, 2016)J/ApJ/817/113 : RIOTS4: spectroscopic survey SMC field OB stars (Lamb+, 2016)J/AcA/66/421 : Eclipsing binaries in the Magellanic System (Pawlak+, 2016)J/ApJ/867/L8 : Gaia kinematic data runaway & field OB stars SMC (Oey+, 2018)J/A+A/625/A104 : Stellar parameters OB stars in SMC wing (Ramachandran+, 2019)J/A+A/624/A66 : Massive runaway and walkaway stars models (Renzo+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/903/43https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/903/43http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/903/43https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/903/43https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/903/43http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/903/43GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/903/43/table1 (Kinematic data and fundamental parameters for RIOTS4 field OB stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/903/43/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/903/43/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/903/43/table1?GETtext/xml+votable180.050000true10.1169506-73.54261190.0055555555555555565/8323 8326 6/33297-33299 33316-33317 33319 33328https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/903/43?format=asciiOpticaldefaultJ/ApJ/903/43/table1Kinematic data and fundamental parameters for RIOTS4 field OB starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[107/84544] Massey, 2002 II/236 identifier (<M2002 SMC NNNNN> in Simbad)meta.id;meta.mainintSpTypeMK spectral type (1)src.spTypecharSubgroupSubgroup classifier (2)src.class.starGalaxyvloc[2/260] Local residual transverse velocity from Oey+, 2018, J/ApJ/867/L8km/sstat.fit.residual;phys.velocinte_vloc[11/47] Error on vlockm/sstat.errorintMass[9.5/61.4]? Stellar masssolMassphys.massfloatnullablef_MassFlag on M (3)meta.codee_Mass[0.7/26.5]? Error on M (4)solMassstat.error;phys.massfloatnullablel_vsiniLimit flag on vsini (5)meta.code.error;phys.veloc.rotatcharvsini[43/439]? Projected rotational velocity (5)km/sphys.veloc.rotatintnullablee_vsini[2/50]? Error on vsinikm/sstat.error;phys.veloc.rotatintnullableTeff[12.0/49.3]? Effective temperaturekKphys.temperature.effectivefloatnullablee_Teff[1.2/10.8]? Error on TeffkKstat.error;phys.temperature.effectivefloatnullablelogL[4.09/6.03]? Log luminositylog(solLum)phys.luminosityfloatnullablee_logL[0.04/0.42]? Error on logLlog(solLum)stat.errorfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition from SIMBAD (right ascension part)degpos.eq.ra;meta.main_DEPosition from SIMBAD (declination part)degpos.eq.dec;meta.main