J/A+A/687/A162ivo://CDS.VizieR/J/A+A/687/A162doi:10.26093/cds/vizier.36870162CDSKahle K.A.Wyrowski F.Koenig C.Christensen I.B.Tiwari M.Menten K.M.2024-11-29T20:03:41Z2024-07-11T09:16:28ZCDS support team

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

cds-question@unistra.fropen-star-clustersradio-astronomyspectroscopychemical-abundancesThe Lagoon Nebula (M8) is host to multiple regions with recent and ongoing massive star formation. The 37 known molecular clumps in M8 are affected by the presence of massive O- and B-type stars. We establish an inventory of molecular species in M8 by conducting an unbiased line survey for each clump. Additional archival data from the Spitzer, Herschel, MSX, APEX, WISE, JCMT and AKARI telescopes are used to derive physical parameters of the dust emission. We identify 346 transitions from 70 different species. While many are exclusively seen toward M8 East, the other clumps also show a large chemical variety. We detect tracers of photo-dissociation regions across all the clumps and 38% of these clumps show signs of star formation. We find that PDR tracers are most abundant in clumps with relatively lower H2 column densities. When comparing M8 clumps to ATLASGAL sources at similar distances, we find them to be slightly less massive and have compatible luminosities and radii. This possibly indicates a fragmentation of the gas caused by the O- and B-type stars. In contrast, dust temperatures of the clumps in M8 are found to be increased by approximately 5K (25%) indicating substantial external heating of the clumps by radiation of the present massive stars.2024A&A...687A.162Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/687/A162CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/687/A162https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/687/A162http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/687/A162https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/687/A162https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/687/A162http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/687/A162GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/687/A162/tablea1 (Coordinates of all the clumps observed with the APEX and the IRAM 30m telescopes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/687/A162/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/687/A162/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/687/A162/tablea1?GETtext/xml+votable180.050000true270.919583-24.3777780.0055555555555555566/28890-28891https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/687/A162?format=asciiRadiodefaultJ/A+A/687/A162/tablea1Coordinates of all the clumps observed with the APEX and the IRAM 30m telescopesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClumpClump designationmeta.id;meta.maincharn_Clump[*] Note on Clump (1)meta.notecharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainJ/A+A/687/A162/tabled1Transitions identified in M8recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpeciesName of the speciesphys.atmol.elementcharqnDescription of transitionphys.atmol.transitioncharFreqTransition frequencyMHzem.freq;phys.atmol.transitiondoublee_FreqUncertainty on transition frequencykHzstat.errorintEupUpper level energyKphys.energy;phys.atmol.levelfloatAijEinstein A coefficients**-1phys.atmol.transProbdoublegDegeneracyphys.electron.degenintOriginOrigin database (catalog)meta.ref;meta.datasetcharSpecieslSpecies in LaTeX notationphys.atmol.elementcharqnlTransition description in LaTeX notationphys.atmol.transitioncharJ/A+A/687/A162/tabled2Fits to the line profilesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreqTransition frequencyMHzem.freq;phys.atmol.transitionfloatrmsRoot mean square noise of spectrummKinstr.det.noise;stat.meanfloatIint? Line intensity from integrating channels (3)K.km/sphot.flux.densityfloatnullablee_Iint? Error on integrated line intensity (3)K.km/sstat.errorfloatnullableIfit1? Line intensity of component 1 from fit (3)K.km/sphot.flux.densityfloatnullablee_Ifit1? Error on fit intensity of component 1 (3)K.km/sstat.errorfloatnullablev1? LOS velocity of component 1 from fit (3) (1)km/sphys.velocfloatnullablee_v1? Error on fit LOS velocity of component 1 (3)km/sstat.errorfloatnullableDeltav1? FWHM line width of component 1 from fit (3)km/sspect.line.widthfloatnullablee_Deltav1? Error on fit FWHM width of component 1 (3)km/sstat.errorfloatnullableTpeak1? Peak temperature of component 1 from fit (3)Kphys.temperaturefloatnullablee_Tpeak1? Error on Tpeak1 (3)Kstat.errorfloatnullabletau1? optical depth of component 1 from fit (3) (2)phys.absorption.opticalDepthfloatnullablee_tau1? Error on optical depth of component 1 (3)stat.errorfloatnullableIfit2? Line intensity of component 2 from fit (3)K.km/sphot.flux.densityfloatnullablee_Ifit2? Error on fit intensity of component 2 (3)K.km/sstat.errorfloatnullablev2? LOS velocity of component 2 from fit (3) (1)km/sphys.velocfloatnullablee_v2? Error on fit LOS velocity of component 2 (3)km/sstat.errorfloatnullableDeltav2? FWHM line width of component 2 from fit (3)km/sspect.line.widthfloatnullablee_tau2? Error on optical depth of component 2 (3)stat.errorfloatnullablee_Deltav2? Error on fit FWHM width of component 2 (3)km/sstat.errorfloatnullableTpeak2? Peak temperature of component 2 from fit (3)Kphys.temperaturefloatnullablee_Tpeak2? Error on Tpeak2 (3)Kstat.errorfloatnullabletau2? Optical depth of component 2 from fit (3) (2)phys.absorption.opticalDepthfloatnullableSourceName of the clump in M8 (M8Clump)meta.id;meta.maincharSpeciesSpecies in LaTeX notationmeta.notecharJ/A+A/687/A162/tableg1Derived column densitiesSourceName of the clump in M8 (M8Clump)meta.id;meta.maincharSpeciesSpecies in LaTeX notationmeta.notecharNSpecies1? Column density of species based on Gaussian component 1cm**-2phys.columnDensityfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNSpecies2? Column density of species based on Gaussian component 2cm**-2phys.columnDensityfloatnullablel_NSpecies1[0/1] 1 if value is an upper limit, 0 if notmeta.code.errorint