Observation of OH Meinel (7,4) P( N″=13) transitions in the night airglow

Pendleton, W. R.; Espy, P. J.; Baker, Doran J.; Steed, Allan J.; Fetrow, Matthew P.; Henriksen, K.

doi:10.1029/ja094ia01p00505

Cited by 43 publications

(43 citation statements)

References 26 publications

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“…For the case of OH, a 200 K rotational distribution only approximates the actual population distribution in the lower rotational levels [ Cosby and Slanger , 2006]; however, this approximation is sufficiently accurate for confident identification of the OH lines. As noted by Pendleton et al [1989] and by Dodd et al [1993], the population distribution in higher rotational levels of OH ( J ′ ≥ 7.5) is much hotter. We follow the population distributions given by Cosby and Slanger [2006] to model these high levels for the identifications.…”

Section: Identification Proceduresmentioning

confidence: 80%

High‐resolution terrestrial nightglow emission line atlas from UVES/VLT: Positions, intensities, and identifications for 2808 lines at 314–1043 nm

et al. 2006

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[1] The atlas of terrestrial nightglow emission lines from spectra of the night sky obtained from the Ultraviolet and Visual Echelle Spectrograph (UVES) on the 8.2-m UT2 telescope at the Very Large Telescope (VLT), European Southern Observatory, Cerro Paranal, Chile, consists of 2808 line positions, line widths, and intensities over the 314-1043 nm spectral range (Hanuschik, 2003). These lines have been absolute intensity calibrated and measured at a spectral resolution (l/Dl) of $43,000-45,000. Presented here are spectroscopic identifications for 98% of the lines in the atlas, made primarily through comparisons with synthetic spectra of prominent OH and O 2 nightglow emission systems. The ability to simulate these systems successfully has shown that there are many additional lines that could be added to the atlas. We believe that all the O 2 and OH lines in the measured region can now be successfully modeled with an accuracy better than the instrumental spectral resolution.

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Section: Identification Proceduresmentioning

confidence: 80%

High‐resolution terrestrial nightglow emission line atlas from UVES/VLT: Positions, intensities, and identifications for 2808 lines at 314–1043 nm

et al. 2006

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“…for the near infrared portion of the visible spectrum [Sharp, 1986;Broadfoot and Kendall, 1968] Caution in analyzing these temperature results should be applied in view of the recent results obtained by Pendleton et al [1989]. This work demonstrated conclusively that departures from thermal equilibrium may be observed for rotational levels greater than the quantum number N = 5.…”

Section: Figures 2a and 2b Present The Terrestrial Airglow Spectrummentioning

confidence: 99%

A review of the photochemistry of selected nightglow emissions from the mesopause

Meriwether¹

1989

J. Geophys. Res.

100

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The substantial research activity of recent years on the photochemistry of the hydrogen‐oxygen family has improved our understanding of the production of nightglow emissions in the mesopause region of the atmosphere between 80 and 100 km; this work is reviewed with specific attention paid to the emissions of OH, the 557.7‐nm emission of O, and the atmospheric bands of O2(b 1Sg). These emissions are closely related to the O atom concentration profile and would provide a wealth of useful photochemical data in studies of noctilucent cloud displays. Ground‐based and rocket measurements of the OH nightglow show that the kinetics are well represented by the combination of the production reaction, H + O3 → OH(v′) + O2, with significant collisional deactivation by N2 and O2 for the higher vibrational levels of OH. In contrast, the perhydroxyl radical, HO2, plays a negligible role in the vibrational excitation of OH and the production of OH optical emission in the mesopause region. Atomic oxygen quenching is important for the lower vibrational states of OH(v′). Improved experimental determination of the electric dipole moment function of OH has resulted in a new set of transition probabilities that agrees well with the theoretical set published by Mies for low v rovibrational transitions of OH. The Mies values for the higher overtone transitions do not agree well with the empirical results derived from airglow intensities. Recent papers on the results of the sounding rocket campaign called Energy Transfer in the Oxygen Nightglow (ETON) have demonstrated the substantial progress made once the consequences of mesospheric dynamics are decoupled from the photochemistry of the mesopause region by in situ measurements of the atomic oxygen concentration. The work of recent years utilizing this approach has produced strong evidence for the deduction that the major source of several important oxygen metastable energy states is an intermediate metastable state formed in the first step of a two step reaction chain (known as the Barth process). Energy transfer and quenching reactions involving these metastable states complicate the analysis of the measurements. Continued progress requires laboratory experiments designed to explore the relationship of energy transfer processes to the vibrational development of the precursor species. The production of global maps of atomic oxygen concentration profiles becomes feasible once the details of the mesopause photochemical processes are fully understood.

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“…However, many works on the airglow radiation of the OH Meinel bands have established that the rotational distribution over the lower rotational levels of a vibrational state is closely Boltzmann (for example, Sivjee and Hamwey, 1987). Pendleton et al (1989) reported the unexpected intense transitions from the rotational level larger than K= 5. In the present work, the rotational quantum numbers K' -1, 2 and 3 in the upper vibrational level v' -3 are used to derive the rotational temperature.…”

Section: Rotational Temperaturementioning

confidence: 99%

“…From the ground measurement of the OH(7-4) band, Pendleton et al (1989) revealed that there is unexpectedly high OH nightglow emission intensity originating from the higher rotational states. Figure 3 in their paper shows that the populations in higher rotational states K > 5, are dramatically departed from those expected under the thermal equilibrium condition.…”

Section: Introductionmentioning

confidence: 99%

Ground-Based Measurement System of the OH Rotational Temperature.

Yamamoto

Kawakami

Sekiguchi

et al. 1995

J. geomagn. geoelec

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The ground-based airglow radiometer to measure the OH rotational temperature has been built. It consists of a rotating disc with eight interference filters in the near infrared wavelength region. To derive the rotational temperature it measures the zenith intensity of the 2P1, 3P1 and 4P1 branches of the OH(3-1) band as well as the background radiation around 1510 nm. It also measures the zenith intensities of the OH(3-l) Q branches, the OH(4-2) Q branches, and the 02 infrared atmospheric (0,0) band as well as the background radiation around 1245 nm. The error due to the detector noise corresponds to be within about 5 K for one data set obtained for 40 sec. A few observational results of the nocturnal variations of the rotational temperature are also presented.

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Observation of OH Meinel (7,4) P( N″=13) transitions in the night airglow

Cited by 43 publications

References 26 publications

High‐resolution terrestrial nightglow emission line atlas from UVES/VLT: Positions, intensities, and identifications for 2808 lines at 314–1043 nm

High‐resolution terrestrial nightglow emission line atlas from UVES/VLT: Positions, intensities, and identifications for 2808 lines at 314–1043 nm

A review of the photochemistry of selected nightglow emissions from the mesopause

Ground-Based Measurement System of the OH Rotational Temperature.

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