J/ApJ/833/L32 High-resolution infrared spectrum of HCl+ (Domenech+, 2016)
The high-resolution infrared spectrum of HCl+.
Domenech J.L., Drouin B.J., Cernicharo J., Herrero V.J., Tanarro I.
<Astrophys. J., 833, L32-L32 (2016)>
=2016ApJ...833L..32D 2016ApJ...833L..32D (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: ISM: molecules; methods: laboratory: molecular; molecular data;
techniques: spectroscopic
Abstract:
The chloroniumyl cation, HCl+, has been recently identified in space
from Herschel's spectra. A joint analysis of extensive vis-UV
spectroscopy emission data together with a few high-resolution and
high-accuracy millimeter-wave data provided the necessary rest
frequencies to support the astronomical identification. Nevertheless,
the analysis did not include any infrared (IR) vibration-rotation
data. Furthermore, with the end of the Herschel mission, IR
observations from the ground may be one of the few available means to
further study this ion in space. In this work, we provide a set of
accurate rovibrational transition wavenumbers, as well as a new and
improved global fit of vis-UV, IR, and millimeter-wave spectroscopy
laboratory data, that will aid in future studies of this molecule.
Description:
The apparatus used in this experiment is basically the same that has
been used recently for the investigation of the IR spectra of
NH3D+ and ArH+ ions (Domenech+ 2013ApJ...771L..11D 2013ApJ...771L..11D; Cueto+ 2014,
J/ApJ/783/L5).
We have provided accurate wavenumber measurements of 183
vibration-rotation lines of H35Cl+ and H37Cl+, measured with
an IR difference-frequency laser spectrometer in a hollow-cathode
discharge cell. See section 2 for the experimental details.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 59 183 Quantum number assignments, observed and calculated
wavenumbers and their differences for the v=1-0
band of HCl+ in the ground electronic state
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See also:
J/ApJ/783/L5 : Ro-vibration transitions of the protonated argon ion
(Cueto+, 2014)
http://spec.jpl.nasa.gov/ftp/pub/catalog/catdir.html : JPL molecular spectro.
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- A(Cl) [35/37] Chlorine mass number
4- 5 I2 --- Nup [1/11] Nup=Jup-Ω' (1)
7- 8 I2 --- Jup [1/11] Upper angular momentum excluding
nuclear spin +1/2
10- 10 I1 --- Fup [1/3]? Upper angular momentum including
nuclear spin +1/2
12- 13 I2 --- Nlo [1/10] Nlo=Jlo-Ω" (1)
15- 16 I2 --- Jlo [1/11] Lower angular momentum excluding
nuclear spin +1/2
18- 18 I1 --- Flo [1/3]? Lower angular momentum including
nuclear spin +1/2
20- 22 A3 --- P [ef-] Parity
24- 33 F10.5 cm-1 nuObs [2337.9/2734.5] Observed frequency
35- 37 I3 10+5cm-1 sigma [29/321] Experimental uncertainty
39- 39 A1 --- Flag [*] *: marks intensity weighted doublets (2)
41- 50 F10.5 cm-1 nuCalc [2337.9/2734.5] Calculated frequency
52- 59 F8.4 10+5cm-1 O-C [-75/85] Observed-calculated frequency
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Note (1): N=J-Ω. The e,f parity labelling follows the convention of
Brown et al. (1975JMoSp..55..500B 1975JMoSp..55..500B). Only transitions with resolved hfs have
F quantum numbers assigned.
Note (2): Wavenumbers with the same value and flagged with an asterisk
have been fitted as an intensity weighted doublet.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 16-May-2017