J/ApJ/855/21 Improved A3Π-X3Σ- transitions of OH+ (Hodges+, 2018)
Improved ultraviolet and infrared oscillator strengths for OH+.
Hodges J.N., Bittner D.M., Bernath P.F.
<Astrophys. J., 855, 21 (2018)>
=2018ApJ...855...21H 2018ApJ...855...21H
ADC_Keywords: Atomic physics; Molecular data
Keywords: astrochemistry ; methods: laboratory: molecular ; molecular data
Abstract:
Molecular ions are key reaction intermediates in the interstellar
medium. OH+ plays a central role in the formation of more complex
chemical species and for estimating the cosmic ray ionization rate in
astrophysical environments. Here, we use a recent analysis of a
laboratory spectrum in conjunction with ab initio methods to calculate
infrared and ultraviolet oscillator strengths. These new oscillator
strengths include branch dependent intensity corrections, arising from
the Herman-Wallis effect, that have not been included before. We
estimate 10% total uncertainty in the UV and 6% total uncertainty in
the IR for the oscillator strengths.
Description:
Following the procedure delineated in Section 2 and incorporating the
constants reported by Hodges & Bernath (2017, J/ApJ/840/81), an
updated line list was generated for the A3Π-X3Σ-
rovibronic transition (hereafter A-X) in the ultraviolet and the
rovibrational transitions of the X3Σ- ground state in the
infrared (hereafter X-X). The calculated line list includes all
experimentally observed vibrational levels (A, v=0, 1; X, v=0, 1, 2,
3, 4) up to J0=30.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 17 145 Dipole moments for the X-X and A-X transitions as a
function of bond length
table3.dat 97 12044 A portion of the linelist with positions,
oscillator strengths, lower state energy, and
Einstein A coefficents
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See also:
J/ApJS/216/22 : 3060-3700Å spectra analysis of early-type stars
(Bhatt+, 2015)
J/ApJ/840/81 : A3Π-X3Σ- transitions of OH+ (Hodges+, 2017)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 F4.2 0.1nm Length [0.7/2.2] Bond length in Angstrom
6- 10 F5.3 D XXDipole [1.6/5.3] Dipole moment for X-X transitions
in Debye
12- 17 F6.3 D AXDipole [-0.6/0.08]? Dipole moment for A-X transitions
in Debye
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 1 A1 --- Eta1 [AX] Upper electronic state
3- 5 A3 --- v1 Upper vibrational quantum number
("v=0" to "v=4")
7- 8 I2 --- J1 [0/30] Upper J quantum number
10- 11 I2 --- N1 [0/31] Upper N quantum number
13- 15 A3 --- Fn1e/f Upper F quantum number and parity
17- 17 A1 --- Eta0 [X] Lower electronic state
19- 21 A3 --- v0 Lower vibrational quantum number
("v=0" to "v=4")
23- 24 I2 --- J0 [0/30] Lower J quantum number
26- 27 I2 --- N0 [0/31] Lower N quantum number
29- 31 A3 --- Fn0e/f Lower F quantum number and parity
33- 40 A8 --- Branch Rovibrational branch label
42- 51 F10.4 cm-1 WaveNum [9.5/30373.3] Line position in wavenumber
53- 66 F14.5 0.1nm lambda [3291.4/1.1e+07] Line position in wavelength (1)
68- 76 E9.3 --- f [1.6e-18/0.0011] Oscillator strength
78- 87 F10.4 cm-1 Elo [-0.05/22862] Lower state energy
89- 97 A9 s-1 A Einstein A coefficient
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Note (1): Wavelengths in standard air for A-X transitions and
in vacuum for X-X transitions.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 15-Nov-2018