J/MNRAS/493/1109ivo://CDS.VizieR/J/MNRAS/493/1109doi:10.26093/cds/vizier.74931109CDSGunay B.Burton M.G.Afsar M.Schmidt T.W.2024-08-20T20:16:07Z2023-07-04T15:27:02ZCDS support team

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

cds-question@unistra.frinterstellar-mediummilky-way-galaxyinfrared-photometryastrometryIn the interstellar medium, the cosmic elemental carbon abundance includes the total carbon in both gas and solid phases. The aim of the study was to trial a new method for measuring the amount and distribution of aliphatic carbon within interstellar dust over wide fields of view of our Galaxy. This method is based on the measurement of the 3.4-{mu}m absorption feature from aliphatic carbonaceous matter. This can readily be achieved for single sources using infrared (IR) spectrometers. However, making such measurements over wide fields requires an imaging IR camera, equipped with narrow-band filters that are able to sample the spectrum. While this cannot produce as good a determination of the spectra, the technique can be applied to potentially tens to hundreds of sources simultaneously, over the field of view of the camera. We examined this method for a field in the centre of the Galaxy, and produced a map showing the variation of 3.4-{mu}m optical depth across it.2020MNRAS.493.1109Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/493/1109CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/493/1109https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/493/1109http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/493/1109https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/493/1109https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/493/1109http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/493/1109GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/493/1109/table8 (Celestial coordinates and the optical depths from the 3.4-{mu}m absorption feature along the line of sight of the Galactic Centre sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/493/1109/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/493/1109/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/493/1109/table8?GETtext/xml+votable180.050000true90.813272-57.8515040.0055555555555555566/39048 390505.517906024225661e-20 6.019532621045829e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/493/1109?format=asciiInfrareddefaultJ/MNRAS/493/1109/table7Calibrated fluxes of the Galactic Centre sources used for optical depth calculationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/200] Internal source identifier (G1)meta.id;meta.mainintS3.33.3{mu}m calibrated flux1e-18W.cm**-2.um**-1phot.flux;em.IR.3-4umfloatS3.43.4{mu}m calibrated flux1e-18W.cm**-2.um**-1phot.flux;em.IR.3-4umfloatS3.63.6{mu}m calibrated flux1e-18W.cm**-2.um**-1phot.flux;em.IR.3-4umfloatJ/MNRAS/493/1109/table8Celestial coordinates and the optical depths from the 3.4-{mu}m absorption feature along the line of sight of the Galactic Centre sources_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.raindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/200] Internal source identifier (G1)meta.id;meta.mainintGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.lattau3.4Optical depth from the 3.4{mu}m absorption featurephys.absorption.opticalDepthfloat