TY - JOUR
T1 - Atlas of new and revised high-resolution spectroscopy of six CO isotopologues in the 101-115 nm range
T2 - Transition energies of the v ′ = 0, 1, 2, and 3 to v ′′ = 0 bands of the B 1 σ+, C1σ+, and E1 II to X1 σ+ states, related term values, and molecular constants
AU - Lemaire, J. L.
AU - Heays, A. N.
AU - Eidelsberg, M.
AU - Gavilan, L.
AU - Stark, G.
AU - Federman, S. R.
AU - Lyons, James
AU - De Oliveira, N.
N1 - Funding Information:
research was supported by NASA (grants NNG 06-GG70G and NNX10AD80G to the Univ. of Toledo and NNX09AC5GG to Wellesley College). J. R. L. and G. S. thank the NASA Origins of Solar System program (Grant NNX14AD49G) for funding. A. H., while in the Amsterdam team, acknowledges support from the Dutch astrochemistry network (DAN) from the Netherlands Organisation for Scientific Research (NWO) under grant 648.000.002 and the research fellowship program of PSL Research University Paris. J. L. L. thanks the ISMO-CNRS (Institut des Sciences Moléculaires d’Orsay at Université Paris-Sud) for hosting him as visiting researcher.
Publisher Copyright:
© 2018 ESO.
PY - 2018/6/1
Y1 - 2018/6/1
N2 - Our knowledge of astronomical environments containing CO depends on accurate molecular data to reproduce and interpret observed spectra. The recent and future improvements of ultraviolet space instrumentation, both in sensitivity and resolution, require increasingly detailed laboratory molecular spectroscopy as a reference. As part of a long-term experimental campaign at the SOLEIL Synchrotron facility, we have acquired gas-phase absorption spectra of six CO isotopologues in the vacuum ultraviolet. These spectra are recorded using the Fourier-transform spectrometer installed on the DESIRS beamline, providing a unique resolving power up to 106 in the 8-13 eV range. We have used resolutions in the 300 000-450 000 range for this campaign, which enable the analysis of individual line positions. We report new measurements on neighboring Rydberg states in the 101-115 nm range that could also be used as f-value calibrators, namely B1Σ+, C1Σ+, and E1Π, for six CO isotopologues. This range encompasses the absorption transitions B(v′ = 0, 1, and 2), C(v′ = 0, 1, 2, and 3), and E(v′ = 0, 1, 2, and 3) from X1Σ+(v′′ = 0). Higher resolution laser-based measurements of CO isotopologues from the literature are used to improve the absolute calibration and accuracy of our data. The overall uncertainty of the great majority of the line positions presented in this atlas is estimated to be 0.01 cm-1. In addition, some of the data derived from transition energies measurements, such as term values and molecular constants, are obtained for the first time, and others are improvements on previous sparser or lower spectral resolution datasets.
AB - Our knowledge of astronomical environments containing CO depends on accurate molecular data to reproduce and interpret observed spectra. The recent and future improvements of ultraviolet space instrumentation, both in sensitivity and resolution, require increasingly detailed laboratory molecular spectroscopy as a reference. As part of a long-term experimental campaign at the SOLEIL Synchrotron facility, we have acquired gas-phase absorption spectra of six CO isotopologues in the vacuum ultraviolet. These spectra are recorded using the Fourier-transform spectrometer installed on the DESIRS beamline, providing a unique resolving power up to 106 in the 8-13 eV range. We have used resolutions in the 300 000-450 000 range for this campaign, which enable the analysis of individual line positions. We report new measurements on neighboring Rydberg states in the 101-115 nm range that could also be used as f-value calibrators, namely B1Σ+, C1Σ+, and E1Π, for six CO isotopologues. This range encompasses the absorption transitions B(v′ = 0, 1, and 2), C(v′ = 0, 1, 2, and 3), and E(v′ = 0, 1, 2, and 3) from X1Σ+(v′′ = 0). Higher resolution laser-based measurements of CO isotopologues from the literature are used to improve the absolute calibration and accuracy of our data. The overall uncertainty of the great majority of the line positions presented in this atlas is estimated to be 0.01 cm-1. In addition, some of the data derived from transition energies measurements, such as term values and molecular constants, are obtained for the first time, and others are improvements on previous sparser or lower spectral resolution datasets.
KW - Methods: laboratory: molecular
KW - Molecular data
KW - Techniques: interferometric
KW - Techniques: spectroscopic
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U2 - 10.1051/0004-6361/201732114
DO - 10.1051/0004-6361/201732114
M3 - Article
AN - SCOPUS:85049598030
SN - 0004-6361
VL - 614
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - A114
ER -