J/MNRAS/454/4013ivo://CDS.VizieR/J/MNRAS/454/4013doi:10.26093/cds/vizier.74544013CDSBailey M.van Loon J.T.Sarre P.J.Beckman J.E.2024-08-15T20:16:19Z2016-05-18T12:27:17ZCDS support team

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

cds-question@unistra.frmilky-way-galaxymagellanic-cloudsinterstellar-mediumline-intensitiesDiffuse interstellar bands (DIBs) trace warm neutral and weakly ionized diffuse interstellar medium (ISM). Here we present a dedicated, high signal-to-noise spectroscopic survey of two of the strongest DIBs, at 5780 and 5797{AA}, in optical spectra of 666 early-type stars in the Small and Large Magellanic Clouds, along with measurements of the atomic NaI D and CaII K lines. The resulting maps show for the first time the distribution of DIB carriers across large swathes of galaxies, as well as the foreground Milky Way ISM. We confirm the association of the 5797{AA} DIB with neutral gas, and the 5780{AA} DIB with more translucent gas, generally tracing the star-forming regions within the Magellanic Clouds. Likewise, the NaI D line traces the denser ISM whereas the CaII K line traces the more diffuse, warmer gas. The CaII K line has an additional component at ~200-220km/s seen towards both Magellanic Clouds; this may be associated with a pan-Magellanic halo. Both the atomic lines and DIBs show sub-pc-scale structure in the Galactic foreground absorption; the 5780 and 5797{AA} DIBs show very little correlation on these small scales, as do the CaII K and NaI D lines. This suggests that good correlations between the 5780 and 5797{AA} DIBs, or between CaII K and NaI D, arise from the superposition of multiple interstellar structures. Similarity in behaviour between DIBs and NaI in the Small Magellanic Cloud (SMC), Large Magellanic Cloud (LMC) and Milky Way suggests the abundance of DIB carriers scales in proportion to metallicity.2015MNRAS.454.4013Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/454/4013CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/123/855 : Magellanic Clouds Photometric Survey: the SMC (Zaritsky+, 2002)J/AJ/128/1606 : Magellanic Clouds Photometric Survey: the LMC (Zaritsky+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/454/4013https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/454/4013http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/454/4013https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/454/4013https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/454/4013http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/454/4013GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/454/4013/table1 (List of observed targets)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/454/4013/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/454/4013/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/454/4013/table1?GETtext/xml+votable180.050000true16.45425-72.8050.0055555555555555566/33091 33094-33097 33100-33101 33293-33295 33304 33306 33316-33317 333283.322582951404819e-19 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/454/4013?format=asciidefaultJ/MNRAS/454/4013/table1List of observed targetsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEWDisplay the EW measurementsmeta.ref.urlcharCluster[SMC LMC] Clustermeta.id.parentcharSeqSequential numbermeta.recordintRAJ2000Right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Declination (J2000) (1)pos.eq.dec;meta.mainGLONGalactic longitude (1)degpos.galactic.lonGLATGalactic latitude (1)degpos.galactic.latdoubleBmagB magnitude (2)magphot.mag;em.opt.BfloatVmagB magnitude (2)magphot.mag;em.opt.VfloatSpTypeMK spectral type (3)src.spTypecharJ/MNRAS/454/4013/table3Spectral line measurements for SMC sightlinesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numbermeta.recordintEWCaIIKbiCaII K blue equivalent width, SMC, internal0.1nmspect.line.eqWidthfloate_EWCaIIKbirms uncertainty on EWCaIIKbi, SMC, internal0.1nmstat.errorfloatRCaIIKbiRatio EWCaIIKb/e_EWCaIIKbi, SMC, internalstat.fit.goodnessfloatEWCaIIKriCaII K red equivalent width, SMC, internal0.1nmspect.line.eqWidthfloate_EWCaIIKrirms uncertainty on EWCaIIKri, SMC, internal0.1nmstat.errorfloatRCaIIKriRatio EWCaIIKri/e_EWCaIIKri, SMC, internalstat.fit.goodnessfloatEW5780i5780{AA} DIB equivalent width, SMC, internal0.1nmspect.line.eqWidthfloate_EW5780irms uncertainty on EW5780i, SMC, internal0.1nmstat.errorfloatR5780iRatio EW5780i/e_EW5780i, SMC, internalstat.fit.goodnessfloatEW5797i5797{AA} DIB equivalent width, SMC, internal0.1nmspect.line.eqWidthfloate_EW5797irms uncertainty on 5797i, SMC, internal0.1nmstat.errorfloatR5797iRatio EW5797i/e_EW5797i, SMC, internalstat.fit.goodnessfloatEWNaID2iNaID2 equivalent width, SMC, internal0.1nmspect.line.eqWidthfloatEWNaID1iNaID1 equivalent width, SMC, internal0.1nmspect.line.eqWidthfloate_EWNaID2irms uncertainty on NaID2, SMC, internal0.1nmstat.errorfloate_EWNaID1irms uncertainty on EWNaID1i, SMC, internal0.1nmstat.errorfloatRNaID2iRatio EWNaID2i/e_EWNaID2i, SMC, internalstat.fit.goodnessfloatRNaID1iRatio EWNaID1i/e_EWNaID1i, SMC, internalstat.fit.goodnessfloatfCaIIKbi[0/1] Detection flag for CaIIKb, SMC, internal (G1)meta.codeintf5780i[0/1] Detection flag for 5780, SMC, internal (G1)meta.codeintf5797i[0/1] Detection flag for 5797, SMC, internal (G1)meta.codeintfNaIDi[0/1] Detection flag for NaID, SMC, internal (G1)meta.codeintEWCaIIKGCaII K equivalent width, Galactic in SMC direction0.1nmspect.line.eqWidthfloate_EWCaIIKGrms uncertainty on EWCaIIKG, Galactic in SMC direction0.1nmstat.errorfloatRCaIIKGRatio EWCaIIKG/e_EWCaIIKG, Galactic in SMC directionstat.fit.goodnessfloatEW5780G5780{AA} DIB equivalent width, Galactic in SMC direction0.1nmspect.line.eqWidthfloate_EW5780Grms uncertainty on EW5780G, Galactic in SMC direction0.1nmstat.errorfloatR5780GRatio EW5780G/e_EW5780G, Galactic in SMC directionstat.fit.goodnessfloatEW5797G5797{AA} DIB equivalent width, Galactic in SMC direction0.1nmspect.line.eqWidthfloate_EW5797Grms uncertainty on EW5797G, Galactic in SMC direction0.1nmstat.errorfloatR5797GRatio EW5797G/e_EW5797G, Galactic in SMC directionstat.fit.goodnessfloatEWNaID2GNaID2 equivalent width, Galactic in SMC direction0.1nmspect.line.eqWidthfloatEWNaID1GNaID1 equivalent width, Galactic in SMC direction0.1nmspect.line.eqWidthfloate_EWNaID2Grms uncertainty on NaID2G, Galactic in SMC direction0.1nmstat.errorfloate_EWNaID1Grms uncertainty on EWNaID1G, Galactic in SMC direction0.1nmstat.errorfloatRNaID2GRatio EWNaID2G/e_EWNaID2G, Galactic in SMC directionstat.fit.goodnessfloatRNaID1GRatio EWNaID1G/e_EWNaID1G, Galactic in SMC directionstat.fit.goodnessfloatfCaIIKG[0/1] Detection flag for CaIIK, Galactic in SMC direction (G1)meta.codeintf5780G[0/1] Detection flag for 5780, Galactic in SMC direction (G1)meta.codeintf5797G[0/1] Detection flag for 5797, Galactic in SMC direction (G1)meta.codeintfNaIDG[0/1] Detection flag for NaID, Galactic in SMC direction (G1)meta.codeintJ/MNRAS/454/4013/table4Spectral line measurements for LMC sightlinesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numbermeta.recordintEWCaIIKbiCaII K blue equivalent width, LMC, internal0.1nmspect.line.eqWidthfloate_EWCaIIKbirms uncertainty on EWCaIIKbi, LMC, internal0.1nmstat.errorfloatRCaIIKbiRatio EWCaIIKbi/e_EWCaIIKbi, LMC, internalstat.fit.goodnessfloatEWCaIIKriCaII K red equivalent width, LMC, internal0.1nmspect.line.eqWidthfloate_EWCaIIKrirms uncertainty on EWCaIIKri, LMC, internal0.1nmstat.errorfloatRCaIIKriRatio EWCaIIKri/e_EWCaIIKri, LMC, internalstat.fit.goodnessfloatEW5780i5780{AA} DIB equivalent width, LMC, internal0.1nmspect.line.eqWidthfloate_EW5780irms uncertainty on EW5780i, LMC, internal0.1nmstat.errorfloatR5780iRatio EW5780i/e_EW5780i, LMC, internalstat.fit.goodnessfloatEW5797i5797{AA} DIB equivalent width, LMC, internal0.1nmspect.line.eqWidthfloate_EW5797irms uncertainty on 5797i, LMC, internal0.1nmstat.errorfloatR5797iRatio EW5797i/e_EW5797i, LMC, internalstat.fit.goodnessfloatEWNaID2iNaID2 equivalent width, LMC, internal0.1nmspect.line.eqWidthfloatEWNaID1iNaID1 equivalent width, LMC, internal0.1nmspect.line.eqWidthfloate_EWNaID2irms uncertainty on NaID2, LMC, internal0.1nmstat.errorfloate_EWNaID1irms uncertainty on EWNaID1, LMC, internal0.1nmstat.errorfloatRNaID2iRatio EWNaID2/e_EWNaID2, LMC, internalstat.fit.goodnessfloatRNaID1iRatio EWNaID1/e_EWNaID1, LMC, internalstat.fit.goodnessfloatfCaIIKbi[0/1] Detection flag for CaIIKb, LMC, internal (G1)meta.codeintf5780i[0/1] Detection flag for 5780, LMC, internal (G1)meta.codeintf5797i[0/1] Detection flag for 5797, LMC, internal (G1)meta.codeintfNaIDi[0/1] Detection flag for NaID, LMC, internal (G1)meta.codeintEWCaIIKbGCaII K blue equivalent width, Galactic in LMC direction0.1nmspect.line.eqWidthfloate_EWCaIIKbGrms uncertainty on EWCaIIKbG, Galactic in LMC direction0.1nmstat.errorfloatRCaIIKbGRatio EWCaIIKbG/e_EWCaIIKbG, Galactic in LMC directionstat.fit.goodnessfloatEWCaIIKrGCaII K red equivalent width, LMC, internal0.1nmspect.line.eqWidthfloate_EWCaIIKrGrms uncertainty on EWCaIIKrG, LMC, internal0.1nmstat.errorfloatRCaIIKrGRatio EWCaIIKrG/e_EWCaIIKrG, LMC, internalstat.fit.goodnessfloatEW5780G5780{AA} DIB equivalent width, Galactic in LMC direction0.1nmspect.line.eqWidthfloate_EW5780Grms uncertainty on EW5780G, Galactic in LMC direction0.1nmstat.errorfloatR5780GRatio EW5780G/e_EW5780G, Galactic in LMC directionstat.fit.goodnessfloatEW5797G5797{AA} DIB equivalent width, Galactic in LMC direction0.1nmspect.line.eqWidthfloate_EW5797Grms uncertainty on EW5797G, Galactic in LMC direction0.1nmstat.errorfloatR5797GRatio EW5797/e_EW5797, Galactic in LMC directionstat.fit.goodnessfloatEWNaID2GNaID2 equivalent width, Galactic in LMC direction0.1nmspect.line.eqWidthfloatEWNaID1GNaID1 equivalent width, Galactic in LMC direction0.1nmspect.line.eqWidthfloate_EWNaID2Grms uncertainty on NaID2, Galactic in LMC direction0.1nmstat.errorfloate_EWNaID1Grms uncertainty on EWNaID1G, Galactic in LMC direction0.1nmstat.errorfloatRNaID2GRatio EWNaID2G/e_EWNaID2G, Galactic in LMC directionstat.fit.goodnessfloatRNaID1GRatio EWNaID1G/e_EWNaID1G, Galactic in LMC directionstat.fit.goodnessfloatfCaIIKbG[0/1] Detection flag for CaIIKbG, Galactic in LMC direction (G1)meta.codeintf5780G[0/1] Detection flag for 5780, Galactic in LMC direction (G1)meta.codeintf5797G[0/1] Detection flag for 5797, Galactic in LMC direction (G1)meta.codeintfNaIDG[0/1] Detection flag for NaID, Galactic in LMC direction (G1)meta.codeint