J/AJ/163/219ivo://CDS.VizieR/J/AJ/163/219doi:10.26093/cds/vizier.51630219CDSMa Y.De Rosa R.J.Kalas P.2022-11-16T05:58:09Z2022-10-26T08:14:37ZCDS support team

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

cds-question@unistra.frstellar-associationsstellar-massesradial-velocityHigh-contrast imaging studies of debris disks have revealed a significant diversity in their morphologies, including large-scale asymmetries. Theories involving stellar flybys, an external source of gravitational disturbance, have offered a plausible explanation for the origin of these morphological variations. Our study is an experiment to gain empirical evidence that has been lacking from such theories. We explore this paradigm by using astrometric and radial velocity measurements from the Gaia DR2 and ground-based observations to trace the trajectories of 625 stars in the Sco-Cen OB association from 5Myr in the past to 2Myr in the future. We identified 119 stars that had at least one past flyby event occurring within one Hill radius, and 23 of these experienced flybys within 0.5 Hill radii. We found no evidence of a significant correlation between the presence of flyby events and infrared excess detections, although the sample is not uniformly sensitive to infrared excess emission. Ten stars that had past flyby events host resolved circumstellar disks that appear relatively symmetric in the existing data except for the circumbinary disk surrounding HD106906. We determined the trajectory and relative velocity of each of these flyby events and compared these to the geometry of the spatially resolved disks. Future work is needed to measure the kinematics of lower-mass stars and to improve sensitivity to circumstellar disks for the entire sample.2022AJ....163..219Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/163/219CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2020)III/190 : WEB Catalog of Radial Velocities (Duflot+ 1995)III/254 : 2nd Cat. Radial Velocities with Astrometric Data (Kharchenko+, 2007)III/272 : RAVE 4th data release (Kordopatis+, 2013)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/A+AS/118/231 : Velocities & rotation of CP stars (Levato+, 1996)J/AJ/117/354 : OB associations from Hipparcos (de Zeeuw+, 1999)J/A+A/356/541 : T Tauri stars in the Sco-Cen OB association (Koehler+, 2000)J/A+A/460/695 : Search for Associations Containing Young stars (Torres+, 2006)J/AN/328/889 : Mean Radial Velocities of open clusters (Kharchenko+, 2007)J/A+A/480/L33 : Radial velocities of HD 4113 and HD 156846 (Tamuz+, 2008)J/A+A/524/A25 : Radial Velocities on 6 exoplanet host stars (Triaud+, 2010)J/ApJ/738/122 : ScoCen debris disks Around F- and G-type stars (Chen+, 2011)J/ApJ/745/56 : Upper Sco members rotational velocities (Dahm+, 2012)J/ApJ/758/31 : IR photometry for members of Upper Sco (Luhman+, 2012)J/AJ/144/8 : Spectro. of ~100 G/K/M-type Sco-Cen complex memb (Song+, 2012)J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)J/ApJ/785/47 : Sources around target stars Upper Scorpius (Lafreniere+, 2014)J/A+A/573/A126 : VLT/NaCo Large program I. Sample (Desidera+, 2015)J/ApJ/827/142 : ALMA observations of GKM stars in Upper Sco (Barenfeld+, 2016)J/ApJS/225/15 : IR excess stars from Tycho-2 and AllWISE (Cotten+, 2016)J/MNRAS/461/794 : Scorpius-Centaurus K-Type Stars (Pecaut+, 2016)J/ApJ/840/87 : Young star systems observed with SALT (Riedel+, 2017)J/A+A/616/A37 : Close encounters to the Sun in Gaia DR2 (Bailer-Jones+, 2018)J/ApJ/856/23 : BANYAN. XI. The BANYAN {Sigma} algorithm (Gagne+, 2018)J/AJ/156/194 : Orbits double-lined pairs in multiple stars (Tokovinin, 2018)J/A+A/623/A112 : The Sco OB2 population from Gaia DR2 data (Damiani+, 2019)J/AJ/157/78 : Double &multiple star systems GaiaDR2 (Jimenez-Esteban+, 2019)J/A+A/640/A73 : pi Men radial velocity curves (De Rosa+, 2020)J/AJ/160/24 : Circumstellar dust of 104 stars with GPIES (Esposito+, 2020)J/A+A/633/A82 : Disks around T Tauri stars with SPHERE. II. (Garufi+, 2020)J/ApJS/247/66 : SUPERWIDE; wide binaries in Gaia & SUPERBLINK (Hartman+, 2020)J/A+A/636/A116 : VLTI/PIONIER images of 15 Herbig Ae/Be stars (Kluska+, 2020)J/AJ/160/44 : Upper Scorpius spectroscopy and photometry (Luhman+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/163/219https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/163/219http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/163/219https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/163/219https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/163/219http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/163/219GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/163/219/events (Events identified from Sco-Cen, USCO and Simulated Potential Flyby events)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/163/219/events?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/163/219/events?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/163/219/events?GETtext/xml+votable180.050000true183.6327708-51.17102330.005555555555555556Cone search capability for table J/AJ/163/219/table4 (Events involving candidates and field stars with d_ca_<1pc and v_rel_<10km/s)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/163/219/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/163/219/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/163/219/table4?GETtext/xml+votable180.050000true179.3016564-36.0826750.005555555555555556Cone search capability for table J/AJ/163/219/rvel (Radial velocities from Sco-Cen and USCO samples)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/163/219/rvel?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/163/219/rvel?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/163/219/rvel?GETtext/xml+votable180.050000true179.3016564-36.0826750.0055555555555555565/10739 10746-10747 10791 10880 11079 11088-11090 11094 11100 6/24613 24740 29187 29198 29320 29348 29358-29359 30722-30723 37149 37186 37197 37236-37237 37268 37314 37888 37905 37928 37953 37968 37973 37978 37990 38023 38084 38145 38151 38157 38162 38212 38215 38255 38272 41513 41528-41530 41534 41603 41606-41607 41632 41634-41635 41637 41643 41652 41657-41658 41661-41662 41670 41677 41682 41704-41705 41707 41710 41726 41815 41866 41869 41900 41906 41917-41918 41946-41947 41973 41983 42021 42096 42174 42242 42252 42351 42382 42400 42406-42407 42412 42416 42419 42425 42428 42466 42509 42549 42559 42563 42584-42585 42595 42601 42605 42611-42613 42617-42619 42622-42623 42640 42645 42649 42651 42655 42658 42670 42672 42674 42676-42678 42684-42685 42688 42694 42696 42701 42707-42709 42711 42725 42727-42728 42730 42736 42738 42746 42749 42751 42754 42757 42763 42782 42800 42808 42811 42848 42854 42857-42860 42873 42876 42896 42901 42907 42909 42911 42913 42916-42917 42924-42925 42928-42930 42932 42934 42940-42941 42943 42945 42947-42949 42952-42953 42955 42968 42972 42977-42978 42980-42982 42994-42995 43000 43002-43004 43009 43011-43012 43014 43017 43019 43021 43028-43029 43037-43038 43054-43055 43057 43059 43062 43067-43068 43070 43072-43073 43085-43086 43093-43094 43097 43101-43102 43111 43115 43117 43127 43130 43133 43137-43140 43147 43150 43153-43154 43157-43158 43160-43162 43168-43169 43171 43177 43182-43183 43192 43196-43197 43201-43202 43205-43206 43208 43210-43211 43219 43224-43225 43228-43230 43232 43238 43244 43246 43255-43256 43259 43272 43274 43276-43277 43285 43292-43293 43298-43299 43323 43326 43331 43338 43342 43345 43349 43365 43367 43369 43372 43375 43377-43378 43383 43392 43394 43397 43402-43403 43407 43414 43416 43423-43425 43427 43429 43432-43433 43435 43460 43469 43488 43492 43507 43527 43529-43533 43535 43538 43540 43555 43557-43558 43564 43603 43616 43677 43683 43700 43716 43764 43843 43910 44043-44044 44046 44052 44054 44059 44069 44076 44081 44085-44086 44088 44096 44098 44101 44106 44114 44119 44132-44133 44136 44139 44146 44156 44165 44178 44204 44288 44293 44303 44305-44308 44310-44313 44321 44329 44333 44337 44341 44343 44364-44366 44368 44371 44384-44386 44388-44389 44397 44408-44409 44421 44436 44469 44480 44485 44491 44502 47806 47863https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/163/219?format=asciidefaultJ/AJ/163/219/eventsEvents identified from Sco-Cen, USCO and Simulated Potential Flyby eventsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintE_dca/RH-FUpper uncertainty in dca/RH,Fstat.error;stat.maxfloatCatCategory (2)meta.codecharIREx?Infrared excess detected (3)meta.codecharSampleField in which event wad identified (SPF = Simulated Potential Flyby)meta.id.parentcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition from SIMBAD (right ascension part)degpos.eq.ra;meta.mainnullable_DEPosition from SIMBAD (declination part)degpos.eq.dec;meta.mainnullableStar1Star 1 identifiermeta.id;meta.maincharStar2Star 2 identifiermeta.id.assoccharRVel? Simulated radial velocity (1)km/sphys.veloc;pos.heliocentricfloatnullableTcaTime of closest approachMyrtime.epochfloate_TcaLower uncertainty in tcaMyrstat.errorfloatE_TcaUpper uncertainty in tcaMyrstat.error;stat.maxfloatDcaDistance of closest approachpcpos.distancefloate_DcaLower uncertainty in dcapcstat.errorfloatE_DcaUpper uncertainty in dcapcstat.error;stat.maxfloatdca/RH-TRatio of closet approach to target Hill radiusphys.size;arith.ratiofloate_dca/RH-TLower uncertainty in dca/RH,Tstat.errorfloatE_dca/RH-TUpper uncertainty in dca/RH,Tstat.error;stat.maxfloatdca/RH-FRatio of closet approach to flyby Hill radiusphys.size;arith.ratiofloate_dca/RH-FLower uncertainty in dca/RH,Fstat.errorfloatJ/AJ/163/219/table4Events involving candidates and field stars with d_ca_<1pc and v_rel_<10km/sCatCategory (3)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStar1Star 1 identifier (1)meta.id;meta.maincharStar2Star 2 identifier (1)meta.id.assoccharTca[-2.43/2.05] Time of closest approachMyrtime.epochfloate_Tca[0.01/2.28] Lower uncertainty in tcaMyrstat.errorfloatDca[0.02/0.99] Distance of closest approachpcpos.distancefloate_Dca[0.01/0.68] Lower uncertainty in dcapcstat.errorfloatE_Dca[0.02/2.39] Upper uncertainty in dcapcstat.error;stat.maxfloatVrel[0.71/9.98] Flyby star's velocity vector (2)km/sphys.velocfloate_Vrel[0.1/5.84] Lower uncertainty in Vrelkm/sstat.errorfloatSimbadSimbad column added by the CDSmeta.ref.urlcharE_Tca[0.01/2.28] Upper uncertainty in tcaMyrstat.error;stat.maxfloatE_Vrel[0.16/9.34] Upper uncertainty in Vrelkm/sstat.error;stat.maxfloat_RAPosition from SIMBAD (right ascension part)degpos.eq.ra;meta.mainnullable_DEPosition from SIMBAD (declination part)degpos.eq.dec;meta.mainnullableJ/AJ/163/219/rvelRadial velocities from Sco-Cen and USCO samplesSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTargetTarget identifiermeta.id;meta.maincharGaiaGaia DR2 identifiermeta.idSpTypeSpectral typesrc.spTypecharMass? Stellar masssolMassphys.massfloatnullableSubGrp? Subgroup (1)meta.notecharGRVel? Gaia DR2 radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_GRVel? Uncertainty in GRVelkm/sstat.errorfloatnullableRVel? Literature radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RVel? Uncertainty in RVelkm/sstat.error;spect.dopplerVelocfloatnullabler_RVelADS bibcode reference for RVelmeta.ref;pos.framecharSampleFiel observedmeta.id.parentchar_RAPosition from SIMBAD (right ascension part)degpos.eq.ra;meta.mainnullable_DEPosition from SIMBAD (declination part)degpos.eq.dec;meta.mainnullable