J/A+A/489/1271ivo://CDS.VizieR/J/A+A/489/1271doi:10.26093/cds/vizier.34891271CDSTsuji T.2017-10-09T13:33:51Z2008-11-23T17:57:50ZCDS support team

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

cds-question@unistra.frgiant-starsinfrared-astronomyspectroscopychemical-abundancesBased on the high resolution infrared spectra observed with the Fourier Transform Spectrometer (FTS) at the 4m telescope of the Kitt Peak National Observatory (KPNO), ro-vibrational lines of ^12^C^16^O, ^13^C^16^O, ^12^C^17^O, and ^16^OH were measured. Some details of the observed spectra including the resolution, S/N ratio, and data of observation are given in table2. The spectroscopic and equivalent width data are given in table3 for 23 red giant stars. The resulting data are used to investigate the nature of the infrared spectra of K-M giant stars. It is found that only the weak lines (log(W/nu)<-4.75) carry the information on the photosphere and hence can be used to extract the nature of the photosphere such as the stellar abundances. The intermediate-strength (-4.75<log(W/nu)<-4.40) as well as the strong (log(W/nu)>-4.4) lines are badly disturbed by the lines of non-photospheric origin. In other words, most lines dominating the infrared spectra, except for the weak lines, are actually hybrid of at least two different kinds of lines originating in the photosphere and in an extra molecular layers outside of photosphere. The nature of the extra layers is not known well, but it may be related to the molecular envelope producing H_2_O lines, not only in late M but also in early M giants as well. Also, the intermediate-strength lines include those with LEP as high as 2eV and hence the extra molecular layer should be quite warm. For the reason outlined above, we determine C, O, and their isotopic abundances using only the weak lines, but we listed the measured data not only of the weak lines but also of the stronger lines as well in table3, with the hope that these data can be of some use to clarify the nature of the warm extra molecular layers.2008A&A...489.1271Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/489/1271CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/489/1271https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/489/1271http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/489/1271https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/489/1271https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/489/1271http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/489/1271GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/489/1271/table2 (Observed spectra of the 23 program stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/489/1271/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/489/1271/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/489/1271/table2?GETtext/xml+votable180.050000true68.980161116.50930140.0055555555555555566/15 254 1015 4365 8926 9589 9813 11519 11874 13392 14878 14907 14968 18547 20940 23540 23996 26180 26320 27694 28799 30958 32271 36233 44248https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/489/1271?format=asciiInfrareddefaultJ/A+A/489/1271/table2Observed spectra of the 23 program starsObs.DateDate of observationtime.epoch;obsnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarIdentification of program starmeta.id;meta.maincharprimarySpRegSpectral region defined by the filter bandinstr.bandwidth;instr.filtercharRResolution of the spectrum (1)dam**-1spect.resolutionfloatS/N? Signal-to-noise ratio of the spectrumstat.snrintnullableSpPlot the spectrum from FTS filemeta.ref.urlcharFileNameName of the FTS spectra file in subdirectory ftsdatameta.id;meta.filecharSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/A+A/489/1271/table3*Equivalent width data of CO and OHrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarIdentification of program starmeta.id;meta.maincharIonIdentification of the isotopic species (1)meta.idcharv'Quantum number of the upper vibrational levelphys.atmol.qn;phys.mol.vibrationintv"Quantum number of the lower vibrational levelphys.atmol.qn;phys.mol.vibrationintTransIdentification of the rotational transitionmeta.idcharnuWave number of the linecm**-1em.wavenumber;spect.linedoubleloggfLogarithm of the gf-valuephys.absorption.coefffloatLEPLower excitation potentialcm**-1phys.atmol.excitation;stat.mindoublelog(W/nu)Logarithm of the equivalent width to wavenumber ratio (2)meta.notefloatSpPlot the line from its spectrum from FTS filemeta.ref.urlchar