J/ApJ/840/81 A3Π-X3Σ- transitions of OH+ (Hodges+, 2017)
Fourier transform spectroscopy of the A3Π-X3Σ transition of OH+.
Hodges J.N., Bernath P.F.
<Astrophys. J., 840, 81 (2017)>
=2017ApJ...840...81H 2017ApJ...840...81H
ADC_Keywords: Atomic physics ; Spectra, ultraviolet
Keywords: astrochemistry ; methods: laboratory: molecular ; molecular data
Abstract:
The OH+ ion is of critical importance to the chemistry in the
interstellar medium and is a prerequisite for the generation of more
complex chemical species. Submillimeter and ultraviolet observations
rely on high quality laboratory spectra. Recent measurements of the
fundamental vibrational band and previously unanalyzed Fourier
transform spectra of the near-ultraviolet A3Π-X3Σ-
electronic spectrum, acquired at the National Solar Observatory (NSO)
at Kitt Peak in 1989, provide an excellent opportunity to perform a
global fit of the available data. These new optical data are
approximately four times more precise as compared to the previous
values. The fit to the new data provides updated molecular constants,
which are necessary to predict the OH+ transition frequencies
accurately to support future observations. These new constants are the
first published using the modern effective Hamiltonian for a linear
molecule. These new molecular constants allow for easy simulation of
transition frequencies and spectra using the PGOPHER program. The new
constants improve simulations of higher J-value infrared transitions,
and represent an improvement of an order of magnitude for some
constants pertaining to the optical transitions.
Description:
Near-UV data were collected by the 1m Fourier transform spectrometer
at Kitt Peak in 1989 by J. W. Brault and R. Engleman and published in
1994 (Stark+ 1994JOSAB..11....3S 1994JOSAB..11....3S).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 63 1009 Line list used in fit including all relevant
transitions and fit residuals
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See also:
J/ApJS/216/22 : 3060-3700Å spectra analysis of early-type stars (Bhatt+,
2015)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 1 A1 --- eS1 [AXc] Upper electronic state
3- 4 A2 --- --- [v=]
5 I1 --- v1 [0/4] Upper vibrational quantum number
7- 8 I2 --- J1 [0/23] Upper J quantum number
10- 11 I2 --- S1 [0/22] Upper S quantum number
13- 15 A3 --- Fn1e/f Upper F number and parity
17- 17 A1 --- eS0 [Xab] Lower electronic state
19- 20 A2 --- --- [v=]
21 I1 --- v0 [0/4] Lower vibrational quantum number
23- 24 I2 --- J0 [0/23] Lower J quantum number
26- 27 I2 --- S0 [0/22] Lower S quantum number
29- 31 A3 --- Fn0e/f Lower F number and parity
33- 43 F11.5 cm-1 Freq [30.3/30015.3] Transition frequency
45- 52 E8.2 cm-1 O-C [-0.1/0.1] Fit residual as observed frequency
minus calculated frequency
54- 61 A8 --- Label Ro-vibrational branch label
63- 63 A1 --- r_Label [NRS] Source label of the data (1)
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Note (1): The sources labels are as follows:
S = Simulated rotational and vibrational from CDMS constants,
Endres et al. (2016JMoSp.327...95E 2016JMoSp.327...95E)
R = Data from Rodgers et al. (2007MolPh.105..849R 2007MolPh.105..849R)
N = New Data presented in this work.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 11-Dec-2017