J/AJ/164/86ivo://CDS.VizieR/J/AJ/164/86doi:10.26093/cds/vizier.51640086CDSKobulnicky H.A.Chick W.T.2023-01-10T08:20:00Z2022-11-21T07:04:25ZCDS support team

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

cds-question@unistra.frh-ii-regionsob-starsearly-type-starsvisible-astronomyspectroscopyradial-velocityproper-motionstrigonometric-parallaxOB stars powering stellar bowshock nebulae (SBNe) have been presumed to have large peculiar velocities. We measured peculiar velocities of SBN central stars to assess their kinematics relative to the general O-star population using Gaia EDR3 data for 267 SBN central stars and a sample of 455 Galactic O stars to derive projected velocities v2D. For a subset of each sample, we obtained new optical spectroscopy to measure radial velocities and identify multiple-star systems. We find a minimum multiplicity fraction of 36%{+/-}6% among SBN central stars, consistent with >28% among runaway Galactic O stars. The large multiplicity fraction among runaways implicates very efficient dynamical ejection rather than binary-supernova origins. The median v2D of SBN central stars is v2D =14.6km/s, larger than the median v2D=11.4km/s for non-bowshock O stars. Central stars of SBNe have a runaway (v2D>25km/s) fraction of 24_-7_^+9^%, consistent with the 22_-3_^+3^% for control-sample O stars. Most (76%) SBNe central stars are not runaways. Our analysis of alignment ({Delta}PA) between the nebular morphological and v2D kinematic position angles reveals two populations: a highly aligned ({sigma}PA=25{deg}) population that includes stars with the largest v2D (31% of the sample) and a random (nonaligned) population (69%). SBNe that lie within or near HII regions comprise a larger fraction of this latter component than SBNe in isolated environments, implicating localized ISM flows as a factor shaping their orientations and morphologies. We outline a new conceptual approach to computing the solar local standard of rest motion, yielding [U{sun},V{sun},W{sun}]=[5.5,7.5,4.5]km/s.2022AJ....164...86Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/164/86CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/sb9 : SB9; 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-2014)III/84 : Galactic O Stars (Cruz-Gonzalez+ 1974)III/135 : Henry Draper Catalogue and Extension (Cannon+ 1918-1924; ADC 1989)III/182 : HDE Charts; positions, proper motions (Nesterov+ 1995)I/259 : The Tycho-2 Catalogue (Hog+ 2000)I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)III/274 : Galactic O-Star Spectroscopic Survey (GOSSS) (Sota+, 2014)I/337 : Gaia DR1 (Gaia Collaboration, 2016)I/345 : Gaia DR2 (Gaia Collaboration, 2018)V/31 : Kinematic data for O-B5 stars (Rubin+, 1962)V/122 : SB9; 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2005)V/125 : Photometry and Spectroscopy for Luminous Stars (Reed 2005)J/ApJS/2/389 : Observations of O and B stars (Hiltner, 1956)J/AJ/106/1906 : NGC 6611; A Cluster Caught in the Act (Hillenbrand+ 1993)J/ApJ/454/151 : OB Associations of the Northern Milky Way (Massey+ 1995)J/ApJS/105/419 : Spectral Atlas of Carbon Stars (Barnbaum+ 1996)J/AJ/133/1092 : vsini of B0-B3 stars in 7 young clusters (Wolff+, 2007)J/MNRAS/410/190 : Young runaway stars within 3kpc (Tetzlaff+, 2011)J/ApJS/213/34 : Velocities of Cygnus OB2 massive binaries (Kobulnicky+, 2014)J/A+A/578/A45 : E-BOSS. II. Catalogue second release (Peri+, 2015)J/ApJS/227/18 : Candidate stellar bowshock nebula from MIR (Kobulnicky+, 2016)J/ApJ/817/113 : RIOTS4; spectroscopic survey SMC field OB stars (Lamb+, 2016)J/ApJS/224/4 : GOSSS III. 142 add. O-type systems (Maiz Apellaniz+, 2016)J/A+A/596/A116 : Radial velocities of K-M dwarfs (Sperauskas+, 2016)J/A+A/612/A50 : New massive members of Cygnus OB2 (Berlanas+, 2018)J/A+A/618/A110 : IR nebulae around bright massive stars (Bodensteiner+, 2018)J/ApJ/867/L8 : Gaia kinematic of runaway & field OB stars in SMC (Oey+, 2018)J/MNRAS/488/1141 : Milky Way Project bubbles & bow shocks (Jayasinghe+, 2019)J/A+A/626/A20 : MONOS. I. Spectral classifications (Maiz Apellaniz+, 2019)J/ApJ/885/131 : ~200 high-mass SFR plx & proper motion with VLBI (Reid+, 2019)J/A+A/624/A66 : Massive runaway and walkaway stars models (Renzo+, 2019)J/ApJS/251/29 : Stellar bow shock nebulae spectroscopic obs. (Chick+, 2020)J/A+A/658/A69 : RVs of B stars in NGC 6231 (Banyard+, 2022)http://gosc.cab.inta-csic.es/ : Galactic O-star cataloghttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/164/86https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/164/86http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/164/86https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/164/86https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/164/86http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/164/86GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/164/86/table1 (Kinematic data of 25 runaway GOSC stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/164/86/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/164/86/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/164/86/table1?GETtext/xml+votable180.050000true305.657357241.67479280.005555555555555556Cone search capability for table J/AJ/164/86/table2 (Astrometric data for selected SBN central stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/164/86/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/164/86/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/164/86/table2?GETtext/xml+votable180.050000true267.032-29.13210.0055555555555555565/7229 10453 6/1293 1355 1577 1781 1930 3037 3214 3231 3245 3249 3307 3315 3585 3600 3607 3622 3724 3747 3816 6891 12970-12971 12988 13255 13999 14179 14237 14240 14254 14263 14266 14270 14312 14314 14336-14337 14341 14352-14353 14356-14357 14365 14403-14404 14409 14411 14610 14615 14621 14631 14633 14636 14640 14643-14645 14654 14656 14664 14668 14670-14671 14679 14682 14685 14688-14689 14693-14694 14697 14704 14706 14712 15426 15623 15634 15636 15640 15644 15680 21432 21647 22240 22258 28814-28815 28825 28828 28831 28833 28848 28875 28878-28879 28890 28912-28913 28915 29094 29100-29102 29112 29115 29118 29162 29445 29463 29467 29469 29506-29507 29511 29517 29522 29534 30245 30262-30263 30269 30306 30312-30313 30330-30331 30418 30421-30422 30595 30605 30647 30654 30689 30691 30693-30695 30701 30706 30718-30719 32071 32085 37247 37333 37335 37340 37367 37372 37743 37754 37838-37839 37881 37883 37905 37930 38016 38018 39253 39386 39804 39937 41653-41654 41670-41671 41675-41678 41682 41684 41696 41755 41759 41763 41766-41767 41769-41772 41798 41801 41805 41810 41820 41825 42116 42169-42172 42210-42211 42214 42220 42226 42228 42230 42376 42378-42380 42383 42387 42391-42393 42397 42421 42434 42438-42439 42444 42447 42454 42460-42462 42496 42501 42514 43017 43020 43025-43026 43035 430401.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/164/86?format=asciiOpticaldefaultJ/AJ/164/86/table1Kinematic data of 25 runaway GOSC starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGOSC[20/474] Galactic O-star catalog identification number (1)meta.id;meta.mainintONameAlias or other common namemeta.idcharRUWE[0.83/1.3] Gaia EDR3 re-normalized unit weight errorstat.errorfloatv2D[25/86] projected two-dimensional peculiar velocitykm/sphys.velocinte_v2D[1/6] Uncertainty in v2Dkm/sstat.errorintRVel[-184/14] mean Heliocentric radial velocitykm/sspect.dopplerVeloc;stat.meanintSimbadSimbad column added by the CDSmeta.ref.urlchare_RVel[2/30] Uncertainty on RVelkm/sstat.error;spect.dopplerVelocintRVel-rms[4/104] radial velocity RMSkm/sstat.stdev;phys.velocintProb[0/1] probability of the null hypothesis (2)stat.probabilityfloatSpTliterature spectral type and luminosity classsrc.spTypecharHJDObservation date(s) for radial velocities, HJD-2458000time.epoch_RAPosition from SIMBAD (right ascension part)degpos.eq.ra;meta.main_DEPosition from SIMBAD (declination part)degpos.eq.dec;meta.mainJ/AJ/164/86/table2Astrometric data for selected SBN central stars_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decnullableindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSBNSBN identifier (1)meta.id;meta.mainintprimaryONameAlias or other common namemeta.idcharRAICRS[6/344] Right Ascension (ICRS at Epoch=2016.0)degpos.eq.ra;meta.mainDEICRS[-64/72] Declination (ICRS at Epoch=2016.0)degpos.eq.dec;meta.mainGaiaGaia EDR3 Identifiermeta.id.crossGmag[4.55/19.1] Gaia EDR3 G-band magnitudemagphot.mag;em.opt.VfloatEnvK16 environment class (2)meta.code.classcharplx[0.08/5.71] Gaia EDR3 parallaxmaspos.parallax.trigfloate_plx[0.01/0.3] Uncertainty in plxmasstat.error;pos.parallaxfloatpmRA[-29.6/5.87] Gaia EDR3 proper motion in RAmas/yrpos.pm;pos.eq.radoublee_pmRA[0.007/0.3] Uncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-42.3/43.6] Gaia EDR3 proper motion in DEmas/yrpos.pm;pos.eq.decdoublee_pmDE[0.009/0.3] Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatCode[1/3] Group Code (3)meta.codeintSpTSpectral Type (4)src.spTypecharRefLiterature reference for SpT (5)meta.ref;pos.framecharKinKinematic data (table3)meta.ref.urlcharJ/AJ/164/86/table3Kinematic data for SBN central starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSBNSBN identifier (1)meta.id;meta.mainintv2D[1/106] Projected 2-dimensional peculiar velocitykm/sphys.velocinte_v2D[1/90] Uncertainty in v2Dkm/sstat.errorintv3D[4/216]? Calculated 3-dimensional velocity (2)km/sphys.velocintnullablee_v3D[2/111]? Uncertainty in v3D (2)km/sstat.errorintnullablePAm[0/358] Morphological position angle (3)degpos.posAngintPAk[3/359] Kinematic position angle (4)degpos.posAnginte_PAk[1/117] Uncertainty in PAkdegstat.errorintDeltaPA[-180/178] difference between PAm & PAk, PAm-PAkdegpos.posAnginte_DeltaPA[8/118] Uncertainty in DeltaPAdegstat.errorintCode[1/3] Code (5)meta.codeint