J/A+A/376/333 Einstein A-coefficients for C3H4 (Sharma+, 2001)
Suggestions for an interstellar cyclopropene search.
Sharma A.K., Chandra S.
<Astron. Astrophys. 376, 333 (2001)>
=2001A&A...376..333S 2001A&A...376..333S
ADC_Keywords: Atomic physics
Keywords: ISM: molecules - molecular data
Abstract:
Following tentative detection of cyclopropene (C3H4) in Sgr B2
through its transition 322-221, several attempts to confirm the
presence of cyclopropene in astronomical objects (including Sgr B2
itself) have been made. We suggest that cyclopropene may be observed
in astronomical objects through its transition 220-221 at
3.67218GHz, in absorption, even against the cosmic 2.7K background, in
a region having low density and low kinetic temperature.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1a.dat 41 201 Ortho-C3H4 Einstein A-coefficient, transition,
and frequency of the transition
table1b.dat 41 217 Para-C3H4 Einstein A-coefficient, transition,
and frequency of the transition
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See also:
J/A+AS/114/175 : Einstein A-coefficients in CS transitions (Chandra+ 1995)
J/A+AS/117/557 : Einstein coefficients for CO transitions (Chandra+ 1996)
J/A+AS/131/137 : Einstein A-Coefficients in SiC2 transitions (Chandra+ 1998)
J/A+AS/142/113 : C3H2 and SiC2 collisional rates (Chandra+, 2000)
J/A+A/376/356 : Diatomic molecules collisional rates (Chandra+, 2001)
Byte-by-byte Description of file: table1[ab].dat
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Bytes Format Units Label Explanations
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1- 8 E8.2 s-1 A Einstein A-coefficient
11- 31 A21 --- Trans Transition
34- 41 F8.3 GHz Freq Frequency of transition
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Acknowledgements: S. Chandra <chandrasuresh@123india.com>
(End) Patricia Bauer [CDS] 27-Aug-2001