J/MNRAS/494/1724ivo://CDS.VizieR/J/MNRAS/494/1724doi:10.26093/cds/vizier.74941724CDSJian M.Taniguchi D.Matsunaga N.Kobayashi N.Ikeda Y.Yasui C.,Kondo S.Sameshima H.Hamano S.Fukue K.Arai A.Otsubo S.,Kawakita H.2024-08-21T20:13:58Z2023-07-28T13:58:09ZCDS support team

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

cds-question@unistra.frdwarf-starsgiant-starssupergiant-starseffective-temperaturemetallicityinfrared-astronomyspectroscopyA line-depth ratio (LDR) of two spectral lines with different excitation potentials is expected to be correlated with the effective temperature (T_eff_). It is possible to determine T_eff_ of a star with a precision of tens of Kelvin if dozens or hundreds of tight LDR-T_eff_ relations can be used. Most of the previous studies on the LDR method were limited to optical wavelengths, but Taniguchi and collaborators reported 81 LDR relations in the YJ band, 0.97-1.32{mu}m, in 2018. However, with their sample of only 10 giants, it was impossible to account for the effects of surface gravity and metallicity on the LDRs well. Here, we investigate the gravity effect based on YJ-band spectra of 63 stars including dwarfs, giants, and supergiants observed with the WINERED spectrograph. We found that some LDR-T_eff_ relations show clear offsets between the sequence of dwarfs and those of giants/supergiants. The difference between the ionization potentials of the elements considered in each line pair and the corresponding difference in the depths can, at least partly, explain the dependency of the LDR on the surface gravity. In order to expand the stellar parameter ranges that the LDR method can cover with high precision, we obtained new sets of LDR-T_eff_ relations for solar-metal G0-K4 dwarfs and F7-K5 supergiants, respectively. The typical precision that can be achieved with our relations is 10-30K for both dwarfs and supergiants.2020MNRAS.494.1724Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/494/1724CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/411/559 : Effective temperature for 181 F-K dwarfs (Kovtyukh+, 2003)J/A+A/427/933 : Precise temperature of F-K field dwarfs (Kovtyukh+, 2004)J/AJ/141/90 : SEGUE stellar parameter pipeline. V. (Lee+, 2011)J/ApJ/785/94 : Lithium abundances of a large sample of red giantsJ/A+A/531/A165 : MILES atmospheric parameters (Prugniel+, 2011)J/A+A/580/A24 : Abundances in dwarfs, subgiants, and giants (da Silva+, 2015)J/AJ/147/137 : Atmospheric parameters in luminous stars (Luck, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/494/1724https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/494/1724http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/494/1724https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/494/1724https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/494/1724http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/494/1724GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/494/1724/table1 (Stellar parameters of the dwarfs in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/494/1724/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/494/1724/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/494/1724/table1?GETtext/xml+votable180.050000true348.320728957.16835670.005555555555555556Cone search capability for table J/MNRAS/494/1724/table2 (Stellar parameters of the giants in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/494/1724/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/494/1724/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/494/1724/table2?GETtext/xml+votable180.050000true28.38890423.18753250.005555555555555556Cone search capability for table J/MNRAS/494/1724/table3 (Stellar parameters of the supergiants in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/494/1724/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/494/1724/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/494/1724/table3?GETtext/xml+votable180.050000true305.557091140.25667920.0055555555555555566/341 377 428 684 1249 1341 1749 2025 2598 2828 3102 3616 4118 4969 5059 5109 5230 5522 6166 6203 7177 7763 9072 9403 9753 10055 10375 11473 11806 12544 13158 14278 14690 15263 15364 15597 17852 18978 21612 21768 22040 23533 23538-23539 23547 23822 23880 24048 24151 24262 24497 26521 26552 26575 26975 27088 27374 28487 28605 31087 31478 32554 40885https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/494/1724?format=asciiInfrareddefaultJ/MNRAS/494/1724/table1Stellar parameters of the dwarfs in our sampleNameStar name (HDNNNNNN)meta.id;meta.maincharSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTeffEffective temperatureKphys.temperature.effectiveinte_TeffError on TeffKstat.error;phys.temperature.effectivefloatr_TeffReference for Teff (1)meta.ref;pos.frameint[Fe/H]Fe/H abundance ratiophys.abund.Fe;arith.ratiofloatloggSurface gravitylog(cm.s**-2)phys.gravityfloatRefReference for [Fe/H] and logg (1)meta.ref;pos.frameintS/NoSignal to noise ratio of the objectstat.snrintS/NtSignal to noise ratio of the telluric standardstat.snrintDateObservation datetime.epoch;obsnullable_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/MNRAS/494/1724/table2Stellar parameters of the giants in our sampleSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (HDNNNNNN)meta.id;meta.maincharTeffEffective temperatureKphys.temperature.effectiveinte_TeffError on TeffKstat.error;phys.temperature.effectivefloat[Fe/H]Fe/H abundance ratiophys.abund.Fe;arith.ratiofloatloggSurface gravitylog(cm.s**-2)phys.gravityfloatRef[1/4] Reference for [Fe/H] and logg (1)meta.ref;pos.frameintS/NoSignal to noise ratio of the objectstat.snrintS/NtSignal to noise ratio of the telluric standardstat.snrintDateObservation datetime.epoch;obsnullable_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/MNRAS/494/1724/table3Stellar parameters of the supergiants in our sampleSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (HDNNNNNN)meta.id;meta.maincharTeffEffective temperatureKphys.temperature.effectiveinte_TeffError on TeffKstat.error;phys.temperature.effectivefloat[Fe/H]Fe/H abundance ratiophys.abund.Fe;arith.ratiofloatloggSurface gravitylog(cm.s**-2)phys.gravityfloatRef[1/3] Reference for [Fe/H] and logg (1)meta.ref;pos.frameintS/NoSignal to noise ratio of the objectstat.snrintS/NtSignal to noise ratio of the telluric standardstat.snrintDateObservation datetime.epoch;obsnullable_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/MNRAS/494/1724/table4The offsets, {Delta}logLDR, between the LDR-T_eff_ relations of the dwarf-supergiant, dwarf-giant, and giant-supergiant pairse_DlogLDRdg? Error on DlogLDRdgstat.errordoublenullableDlogLDRgs? Offset between the LDR-Teff relations of the giant-supergiant pair (3)stat.fit.paramdoublenullablee_DlogLDRgs? Error on DlogLDRgsstat.errordoublenullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDLine pair ID (1)meta.id;meta.maincharXlowLow excitation linemeta.id;spect.linecharXhighHigh excitation linemeta.id;spect.linecharDXDifference of the ionization potentialseVphys.energy;arith.diffdoubleDlogLDRds? Offset between the LDR-Teff relations of the dwarf-supergiant pair (2)stat.fit.paramdoublenullablee_DlogLDRds? Error on DlogLDRdsstat.errordoublenullableDlogLDRdg? Offset between the LDR-Teff relations of the dwarf-giant pair (2)stat.fit.paramdoublenullableJ/MNRAS/494/1724/table6Line pairs and their LDR-T_eff_ relations for dwarfsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDLine pair ID from our set of dwarf LDR-Teff relationsmeta.id;meta.maincharOrderSpectral orderstat.variance;instr.orderintNXlowAtomic number of the low excitation linephys.atmol.numberintXlowLow excitation linemeta.id;spect.linecharlambdalowWavelenght of the low-excitation line0.1nmem.wldoubleEPlowExcitation potential of the low-excitation lineeVphys.atmol.excitation;spect.linefloatNXhighAtomic number of the high excitation linephys.atmol.numberintXhighHigh excitation linemeta.id;spect.linecharlambdahighWavelenght of the high-excitation line0.1nmem.wldoubleEPhighExcitation potential of the high-excitation lineeVphys.atmol.excitation;spect.linefloataSlope of the LDR-Teff relation (Teff=alogr+b)Kstat.fit.paramdoublebIntercept of the LDR-Teff relation (Teff=alogr+b)Kstat.fit.paramdoublesigmaResidual of the fitted LDR-Teff relationKstat.fit.paramdoubleNNumber of stars used for calibrating the relationmeta.numberintlogLDRminLogLDR range used for calibrating the relation (minimum value)stat.fit.paramdoublelogLDRmaxLogLDR range used for calibrating the relation (maximum value)stat.fit.paramdoubleJ/MNRAS/494/1724/table7Line pairs and their LDR-T_eff_ relations for supergiantsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDLine pair ID from our set of dwarf LDR-Teff relationsmeta.id;meta.maincharOrderSpectral orderstat.variance;instr.orderintNXlowAtomic number of the low excitation linephys.atmol.numberintXlowLow excitation linemeta.id;spect.linecharlambdalowWavelenght of the low-excitation line0.1nmem.wldoubleEPlowExcitation potential of the low-excitation lineeVphys.atmol.excitation;spect.linefloatNXhighAtomic number of the high excitation linephys.atmol.numberintXhighHigh excitation linemeta.id;spect.linecharlambdahighWavelenght of the high-excitation line0.1nmem.wldoubleEPhighExcitation potential of the high-excitation lineeVphys.atmol.excitation;spect.linefloataSlope of the LDR-Teff relation (Teff=alogr+b)Kstat.fit.paramdoublebIntercept of the LDR-Teff relation (Teff=alogr+b)Kstat.fit.paramdoublesigmaResidual of the fitted LDR-Teff relationKstat.fit.paramdoubleNNumber of stars used for calibrating the relationmeta.numberintlogLDRminLogLDR range used for calibrating the relation (minimum value)stat.fit.paramdoublelogLDRmaxLogLDR range used for calibrating the relation (maximum value)stat.fit.paramdouble