J/ApJ/943/49ivo://CDS.VizieR/J/ApJ/943/49doi:10.26093/cds/vizier.19430049CDSLopez-Valdivia R.Mace G.N.Han E.Sawczynec E.Hernandez J.,Prato L.Johns-Krull C.M.Oh H.Lee J.-J.Kraus A.Llama J.,Jaffe D.T.2025-02-27T20:13:12Z2025-01-17T11:27:13ZCDS support team

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

cds-question@unistra.frstellar-associationsyoung-stellar-objectsinfrared-astronomyspectroscopystellar-spectral-typeseffective-temperaturemagnetic-fieldsWe used the Immersion GRating Infrared Spectrometer (IGRINS) to determine fundamental parameters for 61 K- and M-type young stellar objects (YSOs) located in the Ophiuchus and Upper Scorpius star-forming regions. We employed synthetic spectra and a Markov chain Monte Carlo approach to fit specific K-band spectral regions and determine the photospheric temperature (T), surface gravity (logg), magnetic field strength (B), projected rotational velocity (vsini), and K-band veiling (rK). We determined B for ~46% of our sample. Stellar parameters were compared to the results from Taurus-Auriga and the TW Hydrae association presented in Paper I of this series. We classified all the YSOs in the IGRINS survey with infrared spectral indices from Two Micron All Sky Survey (2MASS) and Wide-field Infrared Survey Explorer (WISE) photometry between 2 and 24{mu}m. We found that Class II YSOs typically have lower logg and vsini, similar B, and higher K-band veiling than their Class III counterparts. Additionally, we determined the stellar parameters for a sample of K and M field stars also observed with IGRINS. We have identified intrinsic similarities and differences at different evolutionary stages with our homogeneous determination of stellar parameters in the IGRINS YSO survey. Considering logg as a proxy for age, we found that the Ophiuchus and Taurus samples have a similar age. We also find that Upper Scorpius and TWA YSOs have similar ages, and are more evolved than Ophiuchus/Taurus YSOs.2023ApJ...943...49Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/943/49CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/328 : AllWISE Data Release (Cutri+ 2013)J/ApJ/593/1093 : IC 348 membership (Luhman+, 2003)J/AJ/130/1733 : Optical spectroscopy of {rho} Oph stars (Wilking+, 2005)J/A+A/460/695 : Search for Associations Containing Young stars (Torres+, 2006)J/ApJ/712/925 : Transition circumstellar disks in Ophiuchus (Cieza+, 2010)J/ApJ/709/L114 : Protoplanetary disks in PMS binaries (Duchene, 2010)J/ApJS/186/111 : Spitzer observations of Taurus members (Luhman+, 2010)J/ApJS/205/5 : YSO candidates in nearby molecular clouds (Hsieh+, 2013)J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)J/ApJ/786/97 : Photospheric properties of T Tauri stars (Herczeg+, 2014)J/ApJ/785/47 : Sources around target stars in Upper Sco (Lafreniere+, 2014)J/ApJS/220/11 : SEDs of Spitzer YSOs in the Gould Belt (Dunham+, 2015)J/AJ/153/46 : Spectroscopy of candidate members in Taurus (Luhman+, 2017)J/AJ/156/76 : New young stars and brown dwarfs in Upper Sco (Luhman+, 2018)J/AJ/155/196 : K2 LCs for members of USco & {rho} Oph (Rebull+, 2018)J/A+A/622/A149 : Vienna survey in Orion. III. (Grossschedl+, 2019)J/ApJ/879/105 : Effective temp. of low-mass stars (Lopez-Valdivia+, 2019)J/AJ/159/282 : Membership in Ophiuchus & Upper Sco complex (Esplin+, 2020)J/AJ/160/44 : Upper Scorpius spectroscopy and photometry (Luhman+, 2020)J/ApJ/921/53 : IGRINS YSO survey. I. Tau-Aur (Lopez-Valdivia+, 2021)J/ApJ/923/177 : TESS obs. & rot. periods of T Tauri in Orion (Serna+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/943/49https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/943/49http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/943/49https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/943/49https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/943/49http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/943/49GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/943/49/table1 (Basic information and results for our Ophiuchus and Upper Scorpius sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/943/49/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/943/49/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/943/49/table1?GETtext/xml+votable180.050000true241.0902283-21.50793060.005555555555555556Cone search capability for table J/ApJ/943/49/table3 (*Stellar parameters for Taurus and TWA YSOs (see Appendix A1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/943/49/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/943/49/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/943/49/table3?GETtext/xml+votable180.050000true61.166058621.97263330.005555555555555556Cone search capability for table J/ApJ/943/49/table4 (Stellar parameters of the K and M field stars (see Appendix A2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/943/49/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/943/49/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/943/49/table4?GETtext/xml+votable180.050000true66.424306419.01321250.0055555555555555565/270 292 6/4 129 272 323 340 342 357 377 684 722 824 910 940 1029 1031 1033 1037 1039 1042 1048 1050-1054 1061 1068 1073-1075 1078 1096 1111 1114 1123-1124 1136 1156 1159 1456 1762 2512 2622 2942 3118 3163 4444 4468 4881 5009 5207 5224 5346 5387 5435 5534 5722 5853 5998 6346 6662 7264 7354 7753 8219 8357 8440 8861 8887 9888 10149 10225 10771 10982 11636 11806 11962 12507 12616 13766 13960 14278 14539 14709 15311 15602 17288 17314 17816 17870 18161 18496 18743 19064 19323 19778 19912 20051 20064 20896 21519 21691 21884 22040 22277 22289 22309 22878 23094 23286 23316 23478 23535 23537 23543 23548-23549 23551 23575 23895 24203 24205 24227 24294 24297 24300 24608 24629 24763 24843 25113 25880 26015 26555 26583 26792 26927 27201 27392 27459 27594 27730 27802 28058 28343 28417 28548 29158 29958 30327 30505 30728 31014 31087 31397 32115 32335 32491 35531 38341 38347 38363 38382 38687 38742 38797 40679 42314 42959 42970 42980-42981 42983 42989 42992 42994 43000 43571 43670 43677 43704 44356 44361 44365 44374 44378-44379 44400 44884 46566 46922 491467.952274030004205e-20 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/943/49?format=asciiInfrareddefaultJ/ApJ/943/49/table1Basic information and results for our Ophiuchus and Upper Scorpius sampler_BinReference for Bin (1)meta.refcharBinBinary status (2)meta.codecharAv[0.1/8.6]? Visual extinctionmagphys.absorptionfloatnullablee_Av[0.1/1]? Visual extinction uncertaintymagstat.error;phys.absorptionfloatnullablealpha[-2.8/-0.07]? Dereddened infrared indexspect.index;em.IRfloatnullablee_alpha[0.02/0.51]? Dereddened infrared index uncertaintystat.error;spect.index;em.IRfloatnullableQual[0/3]? Quality flag (0=good, 1=acceptable) (3)meta.code.qualintnullableTeff[3129/4652]? TemperatureKphys.temperatureintnullablee_Teff[100/405]? Temperature uncertaintyKstat.error;phys.temperatureintnullablelogg[3.15/4.6]? Surface gravity, log cgslog(cm.s**-2)phys.gravityfloatnullablee_logg[0.16/0.7]? Surface gravity uncertaintylog(cm.s**-2)stat.error;phys.gravityfloatnullablel_BUpper limit flag on Bmeta.code.error;phys.magFieldcharB[0.67/2.7]? Magnetic field strength0.1Tphys.magFieldfloatnullablee_B[0.3/1.1]? Magnetic field strength uncertainty0.1Tstat.error;phys.magFieldfloatnullablevsini[6/35.3]? Projected rotational velocitykm/sphys.veloc.rotatfloatnullablee_vsini[1.8/9]? Projected rotational velocity uncertaintykm/sstat.error;phys.veloc.rotatfloatnullablerk[0.03/7.5]? K-band veilingphys.absorptionfloatnullablee_rk[0.03/1.4]? K-band veiling uncertaintystat.error;phys.absorptionfloatnullable_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.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS identification number (JHHMMSSss+DDMMSSs)meta.id.crosscharNameAlternative namemeta.id;meta.maincharNep[1/10] Number of epochs combinedmeta.numberintKsmag[5.8/10.8] Ks magnitudemagphot.mag;em.IR.KfloatSpTSpectral typesrc.spTypecharr_SpTReference for SpT (1)meta.ref;src.spTypecharSimbadSimbad column added by the CDSmeta.ref.urlcharclusterCluster membership, Oph(iuchus) or USco (Upper Scorpius)meta.code.membercharr_clusterReference for cluster (1)meta.refcharJ/ApJ/943/49/table3*Stellar parameters for Taurus and TWA YSOs (see Appendix A1)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS identification number (JHHMMSSss+DDMMSSs; except TWA 3B)meta.id;meta.maincharSpTSpectral typesrc.spTypecharclusterCluster membership, Tau(rus) or TWA (TW Hydrae Association)meta.code.membercharAv[-0.7/7.2]? Visual extinctionmagphys.absorptionfloatnullablee_Av[0.1/2]? Visual extinction uncertaintymagstat.error;phys.absorptionfloatnullablealpha[-2.9/0.2]? Dereddened infrared indexspect.index;em.IRfloatnullablee_alpha[0/0.6]? Dereddened infrared index uncertaintystat.error;spect.index;em.IRfloatnullableQual[0/2] Quality flag (0=good, 1=acceptable)meta.code.qualintTeff[3203/4606] TemperatureKphys.temperatureinte_Teff[75/437] Temperature uncertaintyKstat.error;phys.temperatureintlogg[3.2/4.7] Surface gravity, log cgslog(cm.s**-2)phys.gravityfloate_logg[0.1/0.7] Surface gravity uncertaintylog(cm.s**-2)stat.error;phys.gravityfloatl_BLimit flag on Bmeta.code.error;phys.magFieldcharB[0.9/3.21] Magnetic field strength0.1Tphys.magFieldfloate_B[0.26/1]? Magnetic field strength uncertainty0.1Tstat.error;phys.magFieldfloatnullablevsini[4.6/43.7] Projected rotational velocitykm/sphys.veloc.rotatfloate_vsini[1.7/9.7] Projected rotational velocity uncertaintykm/sstat.error;phys.veloc.rotatfloatrk[0.02/5.6] K-band veilingphys.absorptionfloate_rk[0.0/1.1] K-band veiling uncertaintystat.error;phys.absorptionfloatPapIDisplay data from Paper I (Lopez-Valdivia+ 2021, J/ApJ/921/53)meta.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.mainSimbadNameSimbad column added by the CDSmeta.idcharnullableJ/ApJ/943/49/table4Stellar parameters of the K and M field stars (see Appendix A2)SimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar Namemeta.id;meta.maincharSpTSpectral type, Lopez-Valdivia+ 2019, J/ApJ/879/105src.spTypecharQual[0/2] Quality flag (0=good, 1=acceptable)meta.code.qualintTeff[3391/4996] Temperature (1)Kphys.temperatureinte_Teff[75/335] Temperature uncertaintyKstat.error;phys.temperatureintlogg[3.14/5.5] Surface gravity (1)log(cm.s**-2)phys.gravityfloate_logg[0.13/0.5] Surface gravity uncertaintylog(cm.s**-2)stat.error;phys.gravityfloatl_BLimit flag on Bmeta.code.error;phys.magFieldcharB[0.04/3.81] Magnetic field strength (1)0.1Tphys.magFieldfloate_B[0.29/2.07]? Magnetic field strength uncertainty0.1Tstat.error;phys.magFieldfloatnullablevsini[2.3/45.7] Projected rotational velocity (1)km/sphys.veloc.rotatfloate_vsini[1.7/5.6] Projected rotational velocity uncertaintykm/sstat.error;phys.veloc.rotatfloatLV19Display data from Lopez-Valdivia+ 2019, J/ApJ/879/105meta.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.main