J/MNRAS/444/1157ivo://CDS.VizieR/J/MNRAS/444/1157doi:10.26093/cds/vizier.74441157CDSDavies C.L.Gregory S.G.Greaves J.S.2024-08-10T20:18:32Z2015-09-09T09:03:32ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starsaccretionIn light of recent substantial updates to spectral type estimations and newly established intrinsic colours, effective temperatures, and bolometric corrections for pre-main sequence (PMS) stars, we re-address the theory of accretion disc-regulated stellar angular momentum (AM) evolution. We report on the compilation of a consistent sample of fully convective stars within two of the most well-studied and youngest, nearby regions of star formation: the Orion nebula Cluster and Taurus-Auriga. We calculate the average specific stellar AM (j*) assuming solid body rotation, using surface rotation periods gathered from the literature and new estimates of stellar radii and ages. We use published Spitzer IRAC fluxes to classify our stars as Class II or Class III and compare their j_*_ evolution. Our results suggest that disc dispersal is a rapid process that occurs at a variety of ages. We find a consistent j_*_ reduction rate between the Class II and Class III PMS stars which we interpret as indicating a period of accretion disc-regulated AM evolution followed by near-constant AM evolution once the disc has dissipated. Furthermore, assuming our observed spread in stellar ages is real, we find that the removal rate of j_*_ during the Class II phase is more rapid than expected by contraction at constant stellar rotation rate. A much more efficient process of AM removal must exist, most likely in the form of an accretion-driven stellar wind or other outflow from the star-disc interaction region or extended disc surface.2014MNRAS.444.1157Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/444/1157CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/444/1157https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/444/1157http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/444/1157https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/444/1157https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/444/1157http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/444/1157GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/444/1157/table1 (Stellar data for all members of the Orion Nebular Cluster (ONC) not identified as binary or multiple for which a spectral type exists in the literature)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/444/1157/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/444/1157/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/444/1157/table1?GETtext/xml+votable180.050000true83.79845-5.28269720.005555555555555556Cone search capability for table J/MNRAS/444/1157/table2 (Stellar data for all members of Taurus-Auriga not identified as binary or multiple for which a spectral type exists in the literature)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/444/1157/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/444/1157/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/444/1157/table2?GETtext/xml+votable180.050000true74.277089231.71402940.0055555555555555565/270 292 6/324-326 331 336 342 347 350 358 368 377 380 473 478 489 1027 1029-1031 1036-1037 1039-1040 1042-1043 1046-1048 1050-1054 1060-1061 1063 1065-1069 1073-1075 1078-1079 1084 1087 1098 1103 1113-1115 1126 1132 1140 1154-1157 1159 1165 1176 1180 1199 1232 1539 21438-21439 22804-22805 23400 23517-23518 23533 23539 23542-23543 23549-23550 24107 24193 24195-24196 24201 24204-24205 24207 24222 24230 24234 24237-24238 24249 24251 24277 24279 24294-24295 243002.367228618189496e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/444/1157?format=asciiOpticaldefaultJ/MNRAS/444/1157/table1Stellar data for all members of the Orion Nebular Cluster (ONC) not identified as binary or multiple for which a spectral type exists in the literaturerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSIMBAD namemeta.id;meta.maincharSpTAdopted spectral typesrc.spTypechare_SpTError on SpTstat.errorfloatref1Reference for SpT (1)meta.ref;pos.framecharTeff[2570/5390] Effective temperature (G2)Kphys.temperature.effectivefloatlogL*[-2.1/1.6]? Bolometric stellar luminosity (G2)log(solLum)phys.luminosityfloatnullableM*[0.1/2.9]? Stellar mass (G3)solMassphys.massfloatnullablee_M*[0.01/1.1]? Error on M* (lower value)solMassstat.errorfloatnullableE_M*[0.01/1.1]? Error on M* (upper value)solMassstat.error;stat.maxfloatnullableAge[0.03/44]? Age (G3)Myrtime.agefloatnullablee_Age[0.02/19.5]? Error on Age (lower value)Myrstat.error;time.agefloatnullableE_Age[0.03/32.5]? Error on Age (upper value)Myrstat.error;stat.maxfloatnullableR*[0.27/8.26]? Stellar radiussolRadphys.size.radiusfloatnullablee_R*[0.05/1.19]? rms uncertainty on R*solRadstat.errorfloatnullablePer[0.33/43.4]? Adopted rotation perioddtime.periodfloatnullablen_PerObserved waveband for rotation period measurement (opt, NIR or MIR)meta.notecharref2Reference for Per (2)meta.ref;pos.framecharClSource classification based on MIR excess (G4)src.classnullableAcc[AN] Accreting (A) / Not accreting (N) sourcemeta.codecharNotesReason, where applicable, for a star's exclusion from the final analysis (G5)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/MNRAS/444/1157/table2Stellar data for all members of Taurus-Auriga not identified as binary or multiple for which a spectral type exists in the literaturerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSIMBAD namemeta.id;meta.maincharSpTAdopted spectral typesrc.spTypechare_SpT[0.2/4] Error on SpTstat.errorfloatr_SpTReferences for SpType, photometry, rotation period and classification, in refs,dat filemeta.ref;pos.framecharTeff[2390/6990]? Effective temperature (G2)Kphys.temperature.effectivefloatnullableVmag? Johnson V magnitudemagphot.mag;em.opt.VfloatnullableB-V? Johnson B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatnullableIcmag? Cousins I magnitudemagphot.mag;em.opt.IfloatnullableV-Ic? Johnson-Cousins V-I colour indexmagphot.color;em.opt.V;em.opt.IfloatnullablelogL*[-2.1/1.0]? Bolometric stellar luminosity (G2)log(solLum)phys.luminosityfloatnullableM*[0.12/2.3]? Stellar mass (G3)solMassphys.massfloatnullablee_M*[0.02/0.6]? Error on M* (lower value)solMassstat.errorfloatnullableE_M*[0.02/0.6]? Error on M* (upper value)solMassstat.error;stat.maxfloatnullableAge[0.09/42]? Age (G3)Myrtime.agefloatnullablee_Age[0.06/16]? Error on Age (lower value)Myrstat.error;time.agefloatnullableE_Age[0.2/30]? Error on Age (upper value)Myrstat.error;stat.maxfloatnullableR*[0.2/4.4]? Stellar radiussolRadphys.size.radiusfloatnullablee_R*[0.03/0.7]? rms uncertainty on R*solRadstat.errorfloatnullablePer[0.39/20]? Adopted rotation perioddtime.periodfloatnullableClSource classification based on MIR excess measurements (G4)src.classnullableNotesReason, where applicable, for a star's exclusion from the final analysis (G5)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/MNRAS/444/1157/refsReferencesComCommentsmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.id;meta.mainintBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorchar