J/AJ/161/133ivo://CDS.VizieR/J/AJ/161/133doi:10.26093/cds/vizier.51610133CDSGregorio-Hetem J.Navarete F.Hetem A.Santos-Silva T.Galli P.A.B.,Fernandes B.Montmerle T.Jatenco-Pereira V.Fernandes M.B.,Perottoni H.D.Schoenell W.Ribeiro T.Kanaan A.2023-05-12T11:29:53Z2021-05-12T07:02:21ZCDS support team

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

cds-question@unistra.frstar-forming-regionsopen-star-clusterspre-main-sequence-starsinfrared-photometryvisible-astronomyWide-band photometrytrigonometric-parallaxproper-motionsAn exotic environment surrounds the young stellar groups associated with the Canis Major (CMa) OB1/R1 region, which probably was formed under feedback from at least three supernova events having occurred a few million years ago. We use astrometric data from the Gaia-DR2 to confirm the membership of the stars in CMa R1, based on proper motion and parallax, which revealed 514 new members and candidates. The mean age of 5Myr estimated from the color-magnitude diagram characterizes the sources as likely pre-main-sequence candidates. In total, a sample of 694 stars detected with the T80-South telescope was analyzed according to different color-color diagrams, which were compared with theoretical colors from evolutionary models, aiming to reveal the objects that exhibit color excess due to accretion processes. Accretion and magnetic activity were also explored on the basis of empirical flux-flux relation, such as F660 and F861 that are related to H{alpha} and CaII triplet emission, respectively. A low fraction (~3%) of the sample have H{alpha} excess and other colors expected for stars exhibiting chromospheric activity. The number of Class I and Class II objects, identified by the infrared (Wide-field Infrared Survey Explorer) colors, indicates a disk fraction of ~6%, which is lower than that expected for stellar clusters with a similar age. Such a large sample of objects associated with CMa R1 without evidences of circumstellar accretion can be interpreted as a lack of disk-bearing stars, unusual for young star-forming regions. However, this may be explained as the result of supernova events.2021AJ....161..133Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/133CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/MNRAS/310/210 : Stellar composition of CMa R1 (Shevchenko+, 1999)J/AJ/131/1184 : A recalibration of optical photometry (Maiz-Apellaniz+,2006)J/AJ/134/2398 : Stellar SEDs in SDSS and 2MASS filters (Covey+, 2007)J/ApJ/686/1195 : IR photometry in the {gamma} Vel cluster (Hernandez+, 2008)J/A+A/506/711 : Canis Major R1 X-ray sources (Gregorio-Hetem+, 2009)J/ApJS/186/259 : Taurus Spitzer survey: new candidate members (Rebull+, 2010)J/ApJ/796/127 : Spitzer h & {chi} Persei candidate members (Cloutier+, 2014)J/MNRAS/440/2036 : VPHAS+ survey synthetic colours (Drew+, 2014)J/MNRAS/441/2891 : ALHAMBRA Survey (Molino+, 2014)J/A+A/570/A82 : Mapping accretion variability in NGC 2264 (Venuti+, 2014)J/MNRAS/453/1026 : Lagoon Nebula M8 T tauri accretion rates (Kalari+, 2015)J/ApJ/827/96 : WISE census of YSOs in Canis Major (Fischer+, 2016)J/A+A/609/A127 : X-ray sources in CMa OB1 (Santos-Silva+, 2018)J/AJ/157/85 : CIDA Variability Survey of Orion OB1. II. (Briceno+, 2019)J/MNRAS/490/2521 : Fractal Statistics in Young Star Clusters (Hetem+, 2019)J/A+A/630/A90 : Halpha emission-line stars in Canis Major (Pettersson+,2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/161/133https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/161/133http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/161/133https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/161/133https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/161/133http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/161/133GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/161/133/table3 (Objects identified in the literature, giving membership probability, parallax, proper motion, and other data from Gaia-DR2)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/133/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/133/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/133/table3?GETtext/xml+votable180.050000true105.3934-11.29380.005555555555555556Cone search capability for table J/AJ/161/133/table5 (Astrometric data for new members of CMa R1)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/133/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/133/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/133/table5?GETtext/xml+votable180.050000true105.3028-11.43090.005555555555555556Cone search capability for table J/AJ/161/133/table6 (Astrometric data for new possible members of CMa R1)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/133/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/133/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/133/table6?GETtext/xml+votable180.050000true105.3104-11.38850.0055555555555555565/5410 6/21644 216461.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/161/133?format=asciiOpticalInfrareddefaultJ/AJ/161/133/table3Objects identified in the literature, giving membership probability, parallax, proper motion, and other data from Gaia-DR2Prob[0/96] Membership probability%statintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaGaia DR2 identificationmeta.id;meta.mainchar2MASS2MASS identificationmeta.id.crosscharRAJ2000[105.3/106.4] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-12.2/-10.9] Declination (J2000)degpos.eq.dec;meta.mainplx[0.805/1.247] Parallaxmaspos.parallax.trigfloate_plx[0.02/0.4] Error in plxmasstat.error;pos.parallaxfloatpmRA[-5.63/9.27] Proper motion in Right Ascension * cos(DE)mas/yrpos.pm;pos.eq.rafloate_pmRA[0.03/0.7] Error in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-14.62/10.93] Proper motion in Declinationmas/yrpos.pm;pos.eq.decfloate_pmDE[0.03/0.9] Error in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatGmag[7.33/18.78] The G magnitude from Gaia DR2magphot.mag;em.opt.VfloatNoteAdditional notes (1)meta.note;meta.idPhotoPhotometric data (table7)meta.ref.urlcharJ/AJ/161/133/table5Astrometric data for new members of CMa R1PhotoPhotometric data (table8)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaGaia DR2 identificationmeta.id;meta.mainchar2MASS2MASS identificationmeta.id.crosscharRAJ2000[105.3/106.7] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-12.2/-10.8] Declination (J2000)degpos.eq.dec;meta.mainProb[50/96] Membership probability%statintplx[0.8/1.25] Parallaxmaspos.parallax.trigfloate_plx[0.02/0.4] Error in plxmasstat.error;pos.parallaxfloatpmRA[-5.55/-3.04] Proper motion in Right Ascension * cos(DE)mas/yrpos.pm;pos.eq.rafloate_pmRA[0.03/0.8] Error in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[0.58/2.92] Proper motion in Declinationmas/yrpos.pm;pos.eq.decfloate_pmDE[0.03/0.8] Error in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatGmag[10.16/21.1] The G magnitude from Gaia DR2magphot.mag;em.opt.VfloatJ/AJ/161/133/table6Astrometric data for new possible members of CMa R1pmDE[0.31/2.63] Proper motion in Declinationmas/yrpos.pm;pos.eq.decfloate_pmDE[0.03/0.6] Error in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatGmag[11.72/19.24] The G magnitude from Gaia DR2magphot.mag;em.opt.VfloatPhotoPhotometric data (table9)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaGaia DR2 identificationmeta.id;meta.mainchar2MASS2MASS identificationmeta.id.crosscharRAJ2000[105.3/106.7] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-12.2/-10.8] Declination (J2000)degpos.eq.dec;meta.mainProb[1/49] Membership probability%statintplx[0.8/1.25] Parallaxmaspos.parallax.trigfloate_plx[0.02/0.4] Error in plxmasstat.error;pos.parallaxfloatpmRA[-5.86/-2.54] Proper motion in Right Ascension * cos(DE)mas/yrpos.pm;pos.eq.rafloate_pmRA[0.03/0.6] Error in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatJ/AJ/161/133/table7Photometric data for T80S sources that were previously identified in the literatureSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDObject identificationmeta.id;meta.maincharumag[7.36/23.23]? The u' magnitudemagphot.mag;em.opt.Ufloatnullablee_umag[0.0/6.4]? Error in umagmagstat.error;phot.magfloatnullablem378mag[7.25/22.44]? The m378 magnitudemagphot.mag;em.opt.Ufloatnullablee_m378mag[0.0/4.19]? Error in m378magmagstat.error;phot.magfloatnullablem395mag[7.48/23.86]? The m395 magnitudemagphot.mag;em.opt.Ufloatnullablee_m395mag[0.0/28.44]? Error in m395magmagstat.error;phot.magfloatnullablem410mag[7.67/25.02]? The m410 magnitudemagphot.mag;em.opt.Bfloatnullablee_m410mag[0.0/29.76]? Error in m410magmagstat.error;phot.magfloatnullablem430mag[7.76/23.98]? The m430 magnitudemagphot.mag;em.opt.Bfloatnullablee_m430mag[0.0/9.04]? Error in m430magmagstat.error;phot.magfloatnullablegmag[8.68/21.34]? The g' magnitudemagphot.mag;em.opt.Vfloatnullablee_gmag[0.0/0.72]? Error in gmagmagstat.error;phot.magfloatnullablem515mag[7.86/20.87]? The m515 magnitudemagphot.mag;em.opt.Vfloatnullablee_m515mag[0.0/1.62]? Error in m515magmagstat.error;phot.magfloatnullablermag[9.03/21.61]? The r' magnitudemagphot.mag;em.opt.Rfloatnullablee_rmag[0.0/1.2]? Error in rmagmagstat.error;phot.magfloatnullablem660mag[9.01/22.74]? The m660 magnitudemagphot.mag;em.opt.Rfloatnullablee_m660mag[0.0/3.79]? Error in m660magmagstat.error;phot.magfloatnullableimag[8.95/22.75]? The i' magnitudemagphot.mag;em.opt.Ifloatnullablee_imag[0.0/0.22]? Error in imagmagstat.error;phot.magfloatnullablem861mag[8.96/22.44]? The m861 magnitudemagphot.mag;em.opt.Ifloatnullablee_m861mag[0.0/0.45]? Error in m861magmagstat.error;phot.magfloatnullablezmag[9.21/18.41]? The z' magnitudemagphot.mag;em.opt.Ifloatnullablee_zmag[0.0/0.18]? Error in zmagmagstat.error;phot.magfloatnullableJ/AJ/161/133/table8Photometric data for T80S sources that are new members of CMa R1e_gmag[0.0/1.98]? Error in gmagmagstat.error;phot.magfloatnullablem515mag[8.02/23.59]? The m515 magnitudemagphot.mag;em.opt.VfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaGaia DR2 identificationmeta.id;meta.maincharumag[9.41/23.67]? The u' magnitudemagphot.mag;em.opt.Ufloatnullablee_umag[0.0/9.91]? Error in umagmagstat.error;phot.magfloatnullablem378mag[7.6/23.87]? The m378 magnitudemagphot.mag;em.opt.Ufloatnullablee_m378mag[0.0/9.64]? Error in m378magmagstat.error;phot.magfloatnullablem395mag[7.69/23.4]? The m395 magnitudemagphot.mag;em.opt.Ufloatnullablee_m395mag[0.0/9.37]? Error in m395magmagstat.error;phot.magfloatnullablem410mag[10.18/24.16]? The m410 magnitudemagphot.mag;em.opt.Bfloatnullablee_m410mag[0.0/9.48]? Error in m410magmagstat.error;phot.magfloatnullablem430mag[7.97/24.12]? The m430 magnitudemagphot.mag;em.opt.Bfloatnullablee_m430mag[0.0/9.89]? Error in m430magmagstat.error;phot.magfloatnullablegmag[9.25/23.44]? The g' magnitudemagphot.mag;em.opt.Vfloatnullablee_m515mag[0.0/7.63]? Error in m515magmagstat.error;phot.magfloatnullablermag[9.61/22.75] The r' magnitudemagphot.mag;em.opt.Rfloate_rmag[0.0/0.41] Error in rmagmagstat.error;phot.magfloatm660mag[7.76/20.55]? The m660 magnitudemagphot.mag;em.opt.Rfloatnullablee_m660mag[0.0/1.21]? Error in m660magmagstat.error;phot.magfloatnullableimag[9.52/22.44] The i' magnitudemagphot.mag;em.opt.Ifloate_imag[0.0/0.22] Error in imagmagstat.error;phot.magfloatm861mag[8.56/20.7] The m861 magnitudemagphot.mag;em.opt.Ifloate_m861mag[0.0/0.27] Error in m861magmagstat.error;phot.magfloatzmag[9.27/18.33]? The z' magnitudemagphot.mag;em.opt.Ifloatnullablee_zmag[0.0/0.55]? Error in zmagmagstat.error;phot.magfloatnullableJ/AJ/161/133/table9Photometric data for T80S sources that are possible members of CMa R1recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaGaia DR2 identificationmeta.id;meta.maincharumag[12.33/23.43]? The u' magnitudemagphot.mag;em.opt.Ufloatnullablee_umag[0.0/6.65]? Error in umagmagstat.error;phot.magfloatnullablem378mag[12.08/23.31]? The m378 magnitudemagphot.mag;em.opt.Ufloatnullablee_m378mag[0.0/9.61]? Error in m378magmagstat.error;phot.magfloatnullablem395mag[12.04/23.01]? The m395 magnitudemagphot.mag;em.opt.Ufloatnullablee_m395mag[0.0/8.19]? Error in m395magmagstat.error;phot.magfloatnullablem410mag[11.95/23.74]? The m410 magnitudemagphot.mag;em.opt.Bfloatnullablee_m410mag[0.0/7.03]? Error in m410magmagstat.error;phot.magfloatnullablem430mag[11.98/23.53]? The m430 magnitudemagphot.mag;em.opt.Bfloatnullablee_m430mag[0.0/9.18]? Error in m430magmagstat.error;phot.magfloatnullablegmag[11.79/21.89]? The g' magnitudemagphot.mag;em.opt.Vfloatnullablee_gmag[0.0/0.62]? Error in gmagmagstat.error;phot.magfloatnullablem515mag[11.67/21.22]? The m515 magnitudemagphot.mag;em.opt.Vfloatnullablee_m515mag[0.0/0.72]? Error in m515magmagstat.error;phot.magfloatnullablermag[11.48/20.22] The r' magnitudemagphot.mag;em.opt.Rfloate_rmag[0.0/0.56] Error in rmagmagstat.error;phot.magfloatm660mag[11.4/19.33]? The m660 magnitudemagphot.mag;em.opt.Rfloatnullablee_m660mag[0.0/0.45]? Error in m660magmagstat.error;phot.magfloatnullableimag[11.24/20.12] The i' magnitudemagphot.mag;em.opt.Ifloate_imag[0.0/0.73] Error in imagmagstat.error;phot.magfloatm861mag[11.13/19.15] The m861 magnitudemagphot.mag;em.opt.Ifloate_m861mag[0.0/0.68] Error in m861magmagstat.error;phot.magfloatzmag[11.12/18.31]? The z' magnitudemagphot.mag;em.opt.Ifloatnullablee_zmag[0.0/0.24]? Error in zmagmagstat.error;phot.magfloatnullable