J/ApJ/935/161ivo://CDS.VizieR/J/ApJ/935/161doi:10.26093/cds/vizier.19350161CDSLi J.Boogert A.Barr A.G.Tielens A.G.G.M.2024-11-06T20:26:39Z2024-06-24T10:34:44ZCDS support team

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

cds-question@unistra.frmultiple-starsstar-forming-regionsinfrared-astronomyspectroscopyWe present in this paper the results of high spectral resolution (R=88100) spectroscopy at 4.7{mu}m with iSHELL/IRTF of hot molecular gas close to the massive binary protostar W3-IRS-5. The binary was spatially resolved, and the spectra of the two sources (MIR1 and MIR2) were obtained simultaneously for the first time. Hundreds of 12CO {nu}=0-1, {nu}=1-2 lines, and {nu}=0-1 transitions of the isotopes of 12CO were detected in absorption and are blueshifted compared to the cloud velocity vLSR=-38km/s. We decompose and identify kinematic components from the velocity profiles and apply rotation diagram and curve-of-growth analyses to determine their physical properties. The temperatures and column densities of the identified components range from 30 to 700K and 1021 to 1022/cm^2^, respectively. Our curve-of-growth analyses consider two scenarios. One assumes a foreground slab with a partial covering factor, which well reproduces the absorption of most of the components. The other assumes a circumstellar disk with an outward-decreasing temperature in the vertical direction and reproduces the absorption of all of the hot components. We attribute the physical origins of the identified components to the foreground envelope (<100K), post-J-shock regions (200-300K), and clumpy structures on the circumstellar disks (~600K). We propose that the components with a J-shock origin are akin to water maser spots in the same region and complement the physical information of water masers along the direction of their movements.2022ApJ...935..161Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/935/161CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/490/213 : 1.4 and 3.4mm interferometry of W3 IRS5 (Rodon+, 2008)J/A+A/627/L6 : ALMA Long Baseline maps of G17.64+0.16 (Maud+, 2019)J/MNRAS/487/2771 : Gaia-DR2 distance to the W3 Complex (Navarete+, 2019)J/MNRAS/504/338 : A Galactic survey of radio jets from MYSOs (Purser+, 2021)J/A+A/655/A84 : AFGL 2591-VLA 3 IRAM/NOEMA datacubes (Suri+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/935/161https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/935/161http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/935/161https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/935/161https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/935/161http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/935/161GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/ApJ/935/161/table9^13^CO Line ParametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTargetMIR1 (NE) or MIR2 (SW) in W3 IRS5meta.id;meta.maincharLineSpecies of the linemeta.id;spect.linecharTransExact transitionphys.atmol.transProb;phys.atmol.transitioncharlambda[4/6] Wavelengthumem.wlfloatEl[0/6332] The energy of lower levelKphys.energy;phys.atmol.levelfloatgl[1/134] The quantum number of lower levelphys.mol.qnintAij[10.8/68.2] Einstein A coefficients**-1phys.atmol.transProbfloatvLSR[-55.4/-37.0] LSR velocity of line centerkm/sphys.veloc;pos.lsrfloate_vLSR[0.1/25.4] Mean error ({sigma}) on vLSRkm/sstat.error;phys.veloc;pos.lsrfloatdeltaV[1.0/7.0] The velocity dispersionkm/sphys.veloc.dispersionfloate_deltaV[0.1/47.9] Mean error ({sigma}) on deltaVkm/sstat.errorfloattau0[0.01/1.59] The optical depth of line centerphys.absorption.opticalDepthfloate_tau0[0.003/0.3] Mean error ({sigma}) on tau0stat.errorfloatNl[0.6/151] The column density of population at lower-level1e+14cm**-2phys.columnDensityfloate_Nl[0.1/265] Mean error ({sigma}) on Nl1e+14cm**-2stat.errorfloatEW[0.04/8.34]? The equivalent width of a linekm/sspect.line.eqWidthfloatnullablee_EW[0.02/16]? Mean error ({sigma}) on Wvkm/sstat.error;spect.line.eqWidthfloatnullable