J/A+A/652/A2ivo://CDS.VizieR/J/A+A/652/A2doi:10.26093/cds/vizier.36520002CDSGrasser N.Ratzenboeck S.Alves J.Grossschedl J.Meingast S.,Zucker C.Hacar A.Lada C.Goodman A.Lombardi M.Forbes J.C.,Bomze I.M.Moeller T.2022-01-17T11:33:09Z2021-07-30T09:02:49ZCDS support team

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

cds-question@unistra.frmolecular-cloudsastronomical-object-identificationastrometryYoung and embedded stellar populations are important probes of the star formation process. Their properties and the environments they create have the potential to affect the formation of new planets. Paradoxically, we have a better census of nearby embedded young populations than of the slightly more evolved optically visible young populations. The high accuracy measurements and all-sky coverage of Gaia data are about to change this situation. This work aims to construct the most complete sample to date of YSOs in the {rho} Oph region. We compile a catalog of 1114 Ophiuchus YSOs from the literature and crossmatch it with the Gaia EDR3, Gaia-ESO, and APOGEE-2 surveys. We apply a multivariate classification algorithm to this catalog to identify new, co- moving population candidates. We find 191 high-fidelity new YSO candidates in the Gaia EDR3 catalog belonging to the {rho} Oph region. The new sources appear to be mainly Class III M-stars and substellar objects and are less extincted than the known members, while we find that 28 of previously unknown sources are YSOs with circumstellar disks (Class I or Class II). The analysis of the proper motion distribution of the entire sample reveals a well-defined bimodality, implying two distinct populations sharing a similar 3D volume. The first population comprises young stars' clusters around the {rho} Ophiuchi star and the main Ophiuchus clouds (L1688, L1689, L1709). In contrast, the second population is slightly older (~10Myr), more dispersed, has a distinct proper motion, and is possibly from the Upper-Sco group. The two populations are moving away from each other at about 4.1km/s and will no longer overlap in about 4Myr. Finally, we flag 17 sources in the literature sample as likely impostors, which are sources that exhibit large deviations from the average properties of the {rho} Oph population. Our results show the importance of accurate 3D space and motion information for improved stellar population analysis.2021A&A...652A...2Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/652/A2CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/350 : Gaia EDR3 (Gaia Collaboration, 2020)III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/652/A2https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/652/A2http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/652/A2https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/652/A2https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/652/A2http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/652/A2GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/652/A2/tableh1 (Final catalog of {rho} Oph (known and new sources))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/652/A2/tableh1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/652/A2/tableh1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/652/A2/tableh1?GETtext/xml+votable180.050000true246.82708333-24.418305550.0055555555555555564/2686 5/10739 10742 10748 10750 11089 11092 6/29322 42951 42953 42955 42964 42966-42967 42972 42998 43004 44352-44353 443741.3088508223161842e-20 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/652/A2?format=asciidefaultJ/A+A/652/A2/tableh1Final catalog of {rho} Oph (known and new sources)New[0/1] =1 for new sources in Gaia EDR3 (New)meta.codeintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaEDR3? Gaia EDR3 ID (source_id_edr3)meta.id;meta.mainnullableRAJ2000Right ascension (J2000) (ra)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (dec)degpos.eq.dec;meta.mainGLONGalactic longitude (l)degpos.galactic.lonGLATGalactic latitude (b)degpos.galactic.latdoubleplx? Parallax (parallax)maspos.parallax.trigdoublenullablee_plx? Parallax error (parallax_error)masstat.error;pos.parallaxfloatnullableDist? Distance (distance)pcpos.distancedoublenullablepmRA? Proper motion in ra (pmra)mas/yrpos.pm;pos.eq.radoublenullablee_pmRA? Error in pmra (pmra_error)mas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE? Proper motion in dec (pmdec)mas/yrpos.pm;pos.eq.decdoublenullablee_pmDE? Error in pmdec (pmdec_error)mas/yrstat.error;pos.pm;pos.eq.decfloatnullableRV? Heliocentric radial velocity (radial_velocity)km/sspect.dopplerVeloc;pos.heliocentricfloatnullablee_RV? Error in radial velocity (radial_velocity_error)km/sstat.errorfloatnullableVTRA? Tangential velocity in RA (v_alpha)km/sphys.veloc.transversefloatnullablee_VTRA? Error in VTRA (v_alpha_error)km/sstat.errorfloatnullableVTDE? Tangential velocity in DE (v_delta)km/sphys.veloc.transversefloatnullablee_VTDE? Error in VTDE (v_delta_error)km/sstat.errorfloatnullableX? Galactic Cartesian X position (X)pcpos.distance;pos.cartesian.x;pos.galacticdoublenullableY? Galactic Cartesian Y position (Y)pcpos.distance;pos.cartesian.y;pos.galacticdoublenullableZ? Galactic Cartesian Z position (Z)pcpos.distance;pos.cartesian.z;pos.galacticdoublenullableU? Galactic Cartesian U velocity (U)km/sphys.veloc;pos.cartesian.xfloatnullableV? Galactic Cartesian V velocity (V)km/sphys.veloc;pos.cartesian.yfloatnullableW? Galactic Cartesian W velocity (W)km/sphys.veloc;pos.cartesian.zfloatnullableRUWE? Renormalized unit weight error (ruwe)stat.errordoublenullableamax? Longest principal axis in the 5-dimensional error ellipsoid (astrometric_sigma5d_max)phys.angSize.smajAxisdoublenullableSolvedWhich parameters have been solved for (astrometric_params_solve)meta.numberintNperNumber of visibility periods (visibility_periods_used)meta.numberintFG? G-band mean flux (phot_g_mean_flux)phot.flux.density;em.optdoublenullablee_FG? Error on G-band mean flux (phot_g_mean_flux_error)stat.errordoublenullableBPmag? G-band mean magnitude (phot_bp_mean_mag)magphot.mag;em.opt.BdoublenullableGmag? Integrated BP mean magnitude (phot_g_mean_mag)magphot.mag;em.optdoublenullableRPmag? Integrated RP mean magnitude (phot_rp_mean_mag)magphot.mag;em.opt.BdoublenullableBP-RP? BP-RP color (bp_rp)phot.color;em.opt.B;em.opt.RdoublenullableTrain[0/1] =1 for sources in the training set (Train)meta.codeintPredict[0/1] =1 for predicted sources in Gaia EDR3 (Predict)meta.codeintStability[0/100] Stability of the sources (Stability)meta.codedoubleImpostors[0/1] =1 for impostor sources (Impostors)meta.codeintpmGLON? Proper motion in l (pml)mas/yrpos.pmdoublenullablepmGLAT? Proper motion in b (pmb)mas/yrpos.pmdoublenullableVGLON? Velocity in l (v_l)km/sphys.velocfloatnullableVGLAT? Velocity in b (v_b)km/sphys.velocfloatnullableAngGLONH? Heliocentric proper motion angle to l-axis (angle_l_hel)degpos.pm;pos.posAng;pos.heliocentricdoublenullablepmGLONlsr? Proper motion in l (LSR) (pml_lsr)mas/yrpos.pmdoublenullablepmGLATlsr? Proper motion in b (LSR) (pmb_lsr)mas/yrpos.pmdoublenullableVGLONlsr? Velocity in l (LSR) (v_l_lsr)km/sphys.velocfloatnullableVGLATlsr? Velocity in b (LSR) (v_b_lsr)km/sphys.velocfloatnullableAngGLONlsr? LSR proper motion angle to l-axis (angle_l_lsr)degpos.pm;pos.posAng;pos.lsrdoublenullablePopPopultion (2) (Pop) (1)meta.codeintIRexcess? IR_excess (3) (IR_excess) (2)meta.codeintnullable2MASS2MASS ID, HHMMSSss+DDMMSSs (designation_2MASS)meta.idcharJmag? J-band magnitude (j_m)magphot.mag;em.IR.Jfloatnullablee_Jmag? Uncertainty in Jmag (j_cmsig)magstat.error;phot.magfloatnullableHmag? H-band magnitude (h_m)magphot.mag;em.IR.Hfloatnullablee_Hmag? Uncertainty in Hmag (h_cmsig)magstat.error;phot.magfloatnullableKmag? K-band magnitude (k_m)magphot.mag;em.IR.Kfloatnullablee_Kmag? Uncertainty in Kmag (k_cmsig)magstat.error;phot.magfloatnullableWISEWISE ID, JHHMMSs.ss+DDMMSS.s (designation_WISE)meta.idcharW1mag? WISE W1 magnitude (w1mpro)magphot.mag;em.IR.3-4umfloatnullableW1snr? W1 signal-to-noise ratio (w1snr)stat.snrfloatnullableW2mag? WISE W2 magnitude (w2mpro)magphot.mag;em.IR.4-8umfloatnullableW2snr? W2 signal-to-noise ratio (w2snr)stat.snrfloatnullableW3mag? WISE W3 magnitude (w3mpro)magphot.flux.density;em.IR.8-15umfloatnullableW3snr? W3 signal-to-noise ratio (w3snr)stat.snrfloatnullableRefReference for literature sources (Ref) (3)meta.ref;pos.framecharr_RVReference for proper motions and radial velocity (Ref_pm_rv) (4)meta.ref;pos.framechar