New spectroscopic studies of the Comet–Tail (A2Πi–X2Σ+) system of the CO+ molecule

Kępa, R.; Kocan, A.; Ostrowska-Kopeć, Małgorzata; Piotrowska-Domagała, I.; Zachwieja, M.

doi:10.1016/j.jms.2004.06.014

Cited by 38 publications

(4 citation statements)

References 30 publications

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“…X = (505379.0094 ± 0.0034) amu MHz Å 2 is a conversion factor, and μ is the charge corrected reduced mass. The small difference between B e and Y 01 could not be determined with confidence for the present parameters plus those of the A – X electronic spectrum, mainly because of the large uncertainty in Y 20 , so we used Y 01 = B e . In the case of the Born–Oppenheimer approximation, the bond distance has been calculated as r e = ( X /( U 01 )) 1/2 , and is independent of the isotopic species.…”

Section: Discussionmentioning

confidence: 94%

Accurate High-N Rest Frequencies for CO⁺, an Ideal Tracer of Photon-Dominated Regions

et al. 2013

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The submillimeter-wave rotational spectra of CO(+), (13)CO(+) and C(18)O(+) in the v = 0 and 1 vibrational states were measured through a hollow cathode dc discharge in a cryogenic cell cooled to liquid nitrogen temperature. In addition, a few transitions of the main isotopic species have been measured between 1.1 and 1.3 THz. An updated isotopically invariant fit, including Born-Oppenheimer breakdown corrections, is presented: the derived set of independent molecular parameters, valid for all the isotopologues of the molecule included in the fit, allows to predict the rotational spectrum with calculated 1σ uncertainty of 280 kHz at 2 THz.

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Section: Discussionmentioning

confidence: 94%

Accurate High-N Rest Frequencies for CO⁺, an Ideal Tracer of Photon-Dominated Regions

et al. 2013

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“…p is the total pressure of plasma. Q (1,1) is the first-order collision integral given by Equation (25). μij is the reduced mass, and the expression is…”

Section: Diffusion Coefficientsmentioning

confidence: 99%

“…When differential cross-section data are available, transport cross-sections can be directly calculated using Equation (25). Table 4 lists the calculation methods of collision integrals between electrons and different neutral particles, which are directly quoted in this study.…”

Section: Electron-neutral Interactionsmentioning

confidence: 99%

Study on Thermophysical Properties of Arc Plasma for Melting Magnesium Oxide Crystals at Atmospheric Pressure

2022

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The thermodynamic and transport properties of magnesium oxide crystal arc plasma have been researched under local thermodynamic equilibrium in this paper. The pure CO2 plasma in the arc initiation stage and Mg-CO mixtures plasma in the stable melting stage were selected. The parameter-variation method combined with Levenberg–Marquardt algorithm (PVM-LMA) is used to solve the plasma equilibrium compositions model established by mass action law from higher to lower temperature in sequence. Taking Mg50%-CO50% plasma as an example, the plasma number density of 7500 K is calculated according to 8000 K. The results show that the PVM-LMA algorithm has the advantages of fast and high precision The comparisons to the results of pure CO2 in previous literature are displayed and our work shows better agreement with theirs. The results of Mg-CO mixtures indicate that the chemical properties of Mg atoms are more active and easier to ionize, which can effectively improve the electrical conductivity and thermal conductivity of plasma and reduce its viscosity.

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“…The current state of knowledge is listed in Table 4. Some of the most complete examinations for the spectral classification of CO + are from observations of cometary ion tails (Vujisić & Pesić 1988;Haridass et al 2000;Kepa et al 2004) and from quantum chemical explorations (Lavendy et al 1993;Xing et al 2018). A very recent laboratory-based Fourier-transform emission spectral examination of this simple molecule has revealed an extensive trove of rovibronic data for the A 2 Π i → X 2 Σ + transition (Hakalla et al 2019).…”

Section: Co +mentioning

confidence: 99%

Knowledge Gaps in the Cometary Spectra of Oxygen-Bearing Molecular Cations

Fortenberry,

Bodewits,

Pierce

2021

Preprint

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Molecular cations are present in various astronomical environments, most notably in cometary atmospheres and tails where sunlight produces exceptionally bright near-UV to visible transitions. Such cations typically have longer-wavelength and brighter electronic emission than their corresponding neutrals. A robust understanding of their near-UV to visible properties would allow these cations to be used as tools for probing the local plasma environments or as tracers of neutral gas in cometary environments. However, full spectral models are not possible for characterization of small, oxygen containing molecular cations given the body of molecular data currently available. The five simplest such species (H 2 O + , CO + 2 , CO + , OH + , and O + 2 ) are well characterized in some spectral regions but are lacking robust reference data in others. Such knowledge gaps hinder fully quantitative models of cometary spectra, specifically, hindering accurate estimates of physical-chemical processes originating with the most common molecules in comets. Herein the existing spectral data are collected for these molecules and highlight the places where future work is needed, specifically where the lack of such data would greatly enhance the understanding of cometary evolution.

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New spectroscopic studies of the Comet–Tail (A2Πi–X2Σ+) system of the CO+ molecule

Cited by 38 publications

References 30 publications

Accurate High-N Rest Frequencies for CO⁺, an Ideal Tracer of Photon-Dominated Regions

Accurate High-N Rest Frequencies for CO⁺, an Ideal Tracer of Photon-Dominated Regions

Study on Thermophysical Properties of Arc Plasma for Melting Magnesium Oxide Crystals at Atmospheric Pressure

Knowledge Gaps in the Cometary Spectra of Oxygen-Bearing Molecular Cations

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New spectroscopic studies of the Comet–Tail (A2Πi–X2Σ+) system of the CO+ molecule

Cited by 38 publications

References 30 publications

Accurate High-N Rest Frequencies for CO+, an Ideal Tracer of Photon-Dominated Regions

Accurate High-N Rest Frequencies for CO+, an Ideal Tracer of Photon-Dominated Regions

Study on Thermophysical Properties of Arc Plasma for Melting Magnesium Oxide Crystals at Atmospheric Pressure

Knowledge Gaps in the Cometary Spectra of Oxygen-Bearing Molecular Cations

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Product

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Accurate High-N Rest Frequencies for CO⁺, an Ideal Tracer of Photon-Dominated Regions

Accurate High-N Rest Frequencies for CO⁺, an Ideal Tracer of Photon-Dominated Regions