J/ApJS/191/96ivo://CDS.VizieR/J/ApJS/191/96doi:10.26093/cds/vizier.21910096CDSMoore M.H.Ferrante R.F.Moore W.J.Hudson R.2011-02-13T04:24:50Z2011-01-25T12:19:23ZCDS support team

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

cds-question@unistra.frinfrared-astronomyspectroscopysolar-system-planetsSpectra and optical constants of nitrile ices known or suspected to be in Titan's atmosphere are presented from 2.0 to 333.3um (~5000-30/cm). These results are relevant to the ongoing modeling of Cassini CIRS observations of Titan's winter pole. Ices studied are: HCN, hydrogen cyanide; C2N2, cyanogen; CH3CN, acetonitrile; C2H5CN, propionitrile; and HC3N, cyanoacetylene. For each of these molecules, we also report new cryogenic measurements of the real refractive index, n, determined in both the amorphous and crystalline phases at 670nm. These new values have been incorporated into our optical constant calculations. Spectra were measured and optical constants were calculated for each nitrile at a variety of temperatures, including, but not limited to, 20, 35, 50, 75, 95, and 110K, in both the amorphous phase and the crystalline phase. This laboratory effort used a dedicated FTIR spectrometer to record transmission spectra of thin-film ice samples. Laser interference was used to measure film thickness during condensation onto a transparent cold window attached to the tail section of a closed-cycle helium cryostat. Optical constants, real (n) and imaginary (k) refractive indices, were determined using Kramers-Kronig analysis. Our calculation reproduces the complete spectrum, including all interference effects.2010ApJS..191...96Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/191/96CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJS/86/713 : IR spectroscopy of ices (Hudgins+, 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/191/96https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/191/96http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/191/96https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/191/96https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/191/96http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/191/96GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/ApJS/191/96/hc3ncrHC3N crystalline phase, real index of refraction n (table 5e) and extinction coefficient k (table 6e)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWavenumber[30,5000] Frequencycm**-1em.freqfloatn(20K)Real index of refraction at 20Kphys.refractIndexdoublen(35K)Real index of refraction at 35Kphys.refractIndexdoublen(50K)Real index of refraction at 50Kphys.refractIndexdoublen(75K)Real index of refraction at 75Kphys.refractIndexdoublen(95K)Real index of refraction at 95Kphys.refractIndexdoublen(110K)Real index of refraction at 110Kphys.refractIndexdoublek(20K)Extinction coefficient at 20Kobs.atmos.extinctiondoublek(35K)Extinction coefficient at 35Kobs.atmos.extinctiondoublek(50K)Extinction coefficient at 50Kobs.atmos.extinctiondoublek(75K)Extinction coefficient at 75Kobs.atmos.extinctiondoublek(95K)Extinction coefficient at 95Kobs.atmos.extinctiondoublek(110K)Extinction coefficient at 110Kobs.atmos.extinctiondoubleJ/ApJS/191/96/hcnamHCN amorphous phase, real index of refraction n (table 3) and extinction coefficient k (table 4)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWavenumber[30,5000] Frequencycm**-1em.freqfloatn(50K)Real index of refraction at 50Kphys.refractIndexdoublen(75K)Real index of refraction at 75Kphys.refractIndexdoublen(95K)Real index of refraction at 95Kphys.refractIndexdoublen(110K)Real index of refraction at 110Kphys.refractIndexdoublek(50K)Extinction coefficient at 50Kobs.atmos.extinctiondoublek(75K)Extinction coefficient at 75Kobs.atmos.extinctiondoublek(95K)Extinction coefficient at 95Kobs.atmos.extinctiondoublek(110K)Extinction coefficient at 100Kobs.atmos.extinctiondoubleJ/ApJS/191/96/c2n2amC2N2 amorphous phase, real index of refraction n (table 3b) and extinction coefficient k (table 4b)n(50K)Real index of refraction at 50Kphys.refractIndexdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWavenumber[30,5000] Frequencycm**-1em.freqfloatn(20K)Real index of refraction at 20Kphys.refractIndexdoublen(35K)Real index of refraction at 35Kphys.refractIndexdoublen(75K)Real index of refraction at 75Kphys.refractIndexdoublek(20K)Extinction coefficient at 20Kobs.atmos.extinctiondoublek(35K)Extinction coefficient at 35Kobs.atmos.extinctiondoublek(50K)Extinction coefficient at 50Kobs.atmos.extinctiondoublek(75K)Extinction coefficient at 75Kobs.atmos.extinctiondoubleJ/ApJS/191/96/ch3cnamCH3CN amorphous phase, real index of refraction n (table 3c) and extinction coefficient k (table 4c)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWavenumber[30,5000] Frequencycm**-1em.freqfloatn(50K)Real index of refraction at 50Kphys.refractIndexdoublen(75K)Real index of refraction at 75Kphys.refractIndexdoublen(95K)Real index of refraction at 95Kphys.refractIndexdoublen(110K)Real index of refraction at 110Kphys.refractIndexdoublek(50K)Extinction coefficient at 50Kobs.atmos.extinctiondoublek(75K)Extinction coefficient at 75Kobs.atmos.extinctiondoublek(95K)Extinction coefficient at 95Kobs.atmos.extinctiondoublek(110K)Extinction coefficient at 110Kobs.atmos.extinctiondoubleJ/ApJS/191/96/c2h5cnamC2H5CN amorphous phase, real index of refraction n (table 3d) and extinction coefficient k (table 4d)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWavenumber[30,5000] Frequencycm**-1em.freqfloatn(50K)Real index of refraction at 50Kphys.refractIndexdoublen(75K)Real index of refraction at 75Kphys.refractIndexdoublen(95K)Real index of refraction at 95Kphys.refractIndexdoublen(110K)? Real index of refraction at 110Kphys.refractIndexdoublenullablek(50K)Extinction coefficient at 50Kobs.atmos.extinctiondoublek(75K)Extinction coefficient at 75Kobs.atmos.extinctiondoublek(95K)Extinction coefficient at 95Kobs.atmos.extinctiondoublek(110K)? Extinction coefficient at 110Kobs.atmos.extinctiondoublenullableJ/ApJS/191/96/hc3namHC3N amorphous phase, real index of refraction n (table 3e) and extinction coefficient k (table 4e)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWavenumber[30,5000] Frequencycm**-1em.freqfloatn(50K)Real index of refraction at 50Kphys.refractIndexdoublen(75K)Real index of refraction at 75Kphys.refractIndexdoublen(95K)Real index of refraction at 95Kphys.refractIndexdoublek(50K)Extinction coefficient at 50Kobs.atmos.extinctiondoublek(75K)Extinction coefficient at 75Kobs.atmos.extinctiondoublek(95K)Extinction coefficient at 95Kobs.atmos.extinctiondoubleJ/ApJS/191/96/hcncrHCN crystalline phase, real index of refraction n (table 5) and extinction coefficient k (table 6)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWavenumber[30,5000] Frequencycm**-1em.freqfloatn(20K)Real index of refraction at 20Kphys.refractIndexdoublen(35K)Real index of refraction at 35Kphys.refractIndexdoublen(50K)Real index of refraction at 50Kphys.refractIndexdoublen(75K)Real index of refraction at 75Kphys.refractIndexdoublen(95K)Real index of refraction at 95Kphys.refractIndexdoublen(110K)Real index of refraction at 110Kphys.refractIndexdoublen(120K)Real index of refraction at 120Kphys.refractIndexdoublek(20K)Extinction coefficient at 20Kobs.atmos.extinctiondoublek(35K)Extinction coefficient at 35Kobs.atmos.extinctiondoublek(50K)Extinction coefficient at 50Kobs.atmos.extinctiondoublek(75K)Extinction coefficient at 75Kobs.atmos.extinctiondoublek(95K)Extinction coefficient at 95Kobs.atmos.extinctiondoublek(110)Extinction coefficient at 110Kobs.atmos.extinctiondoublek(120K)Extinction coefficient at 120Kobs.atmos.extinctiondoubleJ/ApJS/191/96/c2n2crC2N2 crystalline phase, real index of refraction n (table 5b) and extinction coefficient k (table 6b)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWavenumber[30,5000] Frequencycm**-1em.freqfloatn(20K)Real index of refraction at 20Kphys.refractIndexdoublen(35K)Real index of refraction at 35Kphys.refractIndexdoublen(50K)Real index of refraction at 50Kphys.refractIndexdoublen(75K)Real index of refraction at 75Kphys.refractIndexdoublen(95K)Real index of refraction at 95Kphys.refractIndexdoublek(20K)Extinction coefficient at 20Kobs.atmos.extinctiondoublek(35K)Extinction coefficient at 25Kobs.atmos.extinctiondoublek(50K)Extinction coefficient at 50Kobs.atmos.extinctiondoublek(75K)Extinction coefficient at 75Kobs.atmos.extinctiondoublek(95K)Extinction coefficient at 95Kobs.atmos.extinctiondoubleJ/ApJS/191/96/ch3cncrCH3CN crystalline phase, real index of refraction n (table 5c) and extinction coefficient k (table 6c)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWavenumber[30,5000] Frequencycm**-1em.freqfloatn(20K)? Real index of refraction at 20Kphys.refractIndexdoublenullablen(35K)Real index of refraction at 35Kphys.refractIndexdoublen(50K)Real index of refraction at 50Kphys.refractIndexdoublen(75K)Real index of refraction at 75Kphys.refractIndexdoublen(95K)Real index of refraction at 95Kphys.refractIndexdoublen(110K)Real index of refraction at 110Kphys.refractIndexdoublen(130K)Real index of refraction at 130Kphys.refractIndexdoublek(20K)? Extinction coefficient at 20Kobs.atmos.extinctiondoublenullablek(35K)Extinction coefficient at 35Kobs.atmos.extinctiondoublek(50K)Extinction coefficient at 50Kobs.atmos.extinctiondoublek(75K)Extinction coefficient at 75Kobs.atmos.extinctiondoublek(95K)Extinction coefficient at 95Kobs.atmos.extinctiondoublek(110K)Extinction coefficient at 110Kobs.atmos.extinctiondoublek(130K)Extinction coefficient at 130Kobs.atmos.extinctiondoubleJ/ApJS/191/96/c2h5cncrC2H5CN crystalline phase, real index of refraction n (table 5d) and extinction coefficient k (table 6d)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWavenumber[30,5000] Frequencycm**-1em.freqfloatn(20K)Real index of refraction at 20Kphys.refractIndexdoublen(35K)Real index of refraction at 35Kphys.refractIndexdoublen(50K)Real index of refraction at 50Kphys.refractIndexdoublen(75K)Real index of refraction at 75Kphys.refractIndexdoublen(95K)Real index of refraction at 95Kphys.refractIndexdoublen(110K)Real index of refraction at 110Kphys.refractIndexdoublen(140K)Real index of refraction at 140Kphys.refractIndexdoublek(20K)Extinction coefficient at 20Kobs.atmos.extinctiondoublek(35K)Extinction coefficient at 35Kobs.atmos.extinctiondoublek(50K)Extinction coefficient at 50Kobs.atmos.extinctiondoublek(75K)Extinction coefficient at 75Kobs.atmos.extinctiondoublek(95K)Extinction coefficient at 95Kobs.atmos.extinctiondoublek(110K)Extinction coefficient at 110Kobs.atmos.extinctiondoublek(140K)Extinction coefficient at 140Kobs.atmos.extinctiondouble