J/A+A/549/A38 Millimetre and infrared spectrum of DC4H (Tamassia+, 2013)
Accurate ro-vibrational rest frequencies of DC4H at infrared and millimetre
wavelengths.
Tamassia F., Bizzocchi L., Degli Esposti C., Dore L., Di Lauro M.,
Fusina L., Villa M., Cane E.
<Astron. Astrophys. 549, A38 (2013)>
=2013A&A...549A..38T 2013A&A...549A..38T
ADC_Keywords: Atomic physics
Keywords: ISM: molecules - line: identification - molecular data -
molecular processes - infrared: ISM
Abstract:
Diacetylene, C4H2, has been identified in several astronomical
environments through its infrared spectrum. In contrast,
monodeuterated diacetylene (DC4H) has not been detected in space so
far owing to the low isotopic abundance of deuterated species but also
to the rather poor laboratory spectroscopic characterisation of this
molecule.
The aim of this work is to provide accurate spectroscopic parameters
for DC4H to achieve reliable predictions for both its spectra at
millimetre and infrared wavelengths.
We studied the rotational spectrum of DC4H in the range 85-615GHz by
millimetre-wave spectroscopy and the infrared spectrum below 1000cm-1
by high-resolution, Fourier-transform spectroscopy. Several pure
rotational transitions were recorded in the ground state and in
excited vibrational bending states. The three fundamental bands v6,
v7, and v8 have been identified and assigned in the infrared spectrum.
Description:
The table contains the measured and predicted line positions, quantum
numbers, estimated 1σ uncertainties, and line strengths for
millimetre and infrared transitions of DC4H.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 99 2147 Measured and predicted line positions
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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2- 4 I3 --- J' [1/120] Upper level J quantum number
8- 9 I2 --- l' [0/1] Upper level l quantum number
14 A1 --- p' [ef] Upper level e(-)/f(+) parity
18- 19 I2 --- v' [0/9] Upper level v quantum number
21- 23 I3 --- J [0/120] Lower level J quantum number
27- 28 I2 --- l [0/1] Lower level l quantum number
33 A1 --- p [ef] Lower level e(-)/f(+) parity
37- 38 I2 --- v [0/9] Lower level v quantum number
42- 52 F11.4 --- RFmeas ?=- Measured line position (in rest frame) (2)
54- 58 F5.4 --- e_RFmeas ? Assumed uncertainties (2)
61- 73 F13.6 --- RFpred Predicted line position (in rest frame) (2)
77- 83 E7.5 --- e_RFpred Estimated 1σ level error (2)
86- 89 A4 --- x_RF Units for RFmeas, RFunc, RFpred and sigma (2)
91- 99 F9.3 --- S Transition strength
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Note (2): the line positions are
* either wavenumbers expressed in cm-1 (when x_RF="cm-1")
* or frequencies expressed in MHz (when x_RF="MHz")
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Acknowledgements:
Filippo Tamassia, filippo.tamassia(at)unibo.it
(End) Patricia Vannier [CDS] 14-Nov-2012