J/ApJ/783/36 Linelists for C3H- from CALPGM (McGuire+, 2014)
An observational investigation of the identity of B11244 (l-C3H+/C3H-).
McGuire B.A., Carroll P.B., Gratier P., Guzman V., Pety J., Roueff E.,
Gerin M., Blake G.A., Remijan A.J.
<Astrophys. J., 783, 36 (2014)>
=2014ApJ...783...36M 2014ApJ...783...36M (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium ; Atomic physics ; Spectroscopy
Keywords: astrochemistry - ISM: clouds - ISM: molecules -
ISM: individual (Sagittarius B2(N), TMC-1, Horsehead PDR, IRC+10216)
Abstract:
Pety et al. have reported the detection of eight transitions of a
closed-shell, linear molecule (B11244) in observations toward the
Horsehead photodissociation region (PDR), which they attribute to the
l-C3H+ cation. Recent high-level ab initio calculations have
called this assignment into question; the anionic C3H- molecule
has been suggested as a more likely candidate. Here, we examine
observations of the Horsehead PDR, Sgr B2(N), TMC-1, and IRC+10216 in
the context of both l-C3H+ and C3H-. We find no observational
evidence of Ka=1 lines, which should be present were the carrier
indeed C3H-. Additionally, we find a strong anticorrelation
between the presence of known molecular anions and B11244 in these
regions. Finally, we discuss the formation and destruction chemistry
of C3H- in the context of the physical conditions in the regions.
Based on these results, we conclude there is little evidence to
support the claim that the carrier is C3H-.
Description:
A catalog for anionic C3H- molecule to 2THz from the CALPGM suite
of programs is provided in Table2.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 92 597 CALPGM catalog simulation of C3H- format
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See also:
J/A+A/587/L4 : Methyl isocyanate in Orion (Cernicharo+, 2016)
J/A+A/562/A56 : CH2CN- and its deuterated derivatives (Majumdar+, 2014)
J/ApJ/688/L83 : Detection of C5N- in IRC +10216 (Cernicharo+, 2008)
J/A+A/449/855 : Linelists for ammonia NH3, NH2D, ND2H, and ND3 (Coudert+, 2006)
http://spec.jpl.nasa.gov/ : Jet Propulsion Laboratory
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 F13.4 MHz Freq [51/2e+06] Line frequency (1)
15- 22 F8.4 MHz e_Freq [0.005/1000] Error in Freq
24- 31 F8.4 [nm2/MHz] logI [-11/-1] Log of integrated intensity at 300K
33 I1 --- DOF [3] Degrees of freedom in rotational
partition function (0=atoms, 2=linear
molecule, 3=nonlinear molecule)
35- 43 F9.4 cm-1 ELow [0/3795] Lower state energy (2)
45- 46 I2 --- GUp [3/41] Upper state degeneracy
48- 52 I5 --- Species [60006] Species tag or molecular
identifier (60006) (3)
54- 56 I3 --- QnF [303/303] Quantum number format identifier (4)
58- 59 I2 --- Q1up [1/20] First quantum number upper state (5)
61- 62 I2 --- Q2up [0/15] Second quantum number upper state (5)
64- 65 I2 --- Q3up [0/20] Third quantum number upper state (5)
67- 68 I2 --- Q4up ? Fourth quantum number upper state (5)
70- 71 I2 --- Q5up ? Fifth quantum number upper state (5)
73- 74 I2 --- Q6up ? Sixth quantum number upper state (5)
76- 77 I2 --- Q1low [0/20] First quantum number lower state (5)
79- 80 I2 --- Q2low [0/15] Second quantum number lower state (5)
82- 83 I2 --- Q3low [0/20] Third quantum number lower state (5)
85- 86 I2 --- Q4low ? Fourth quantum number lower state (5)
88- 89 I2 --- Q5low ? Fifth quantum number lower state (5)
91- 92 I2 --- Q6low ? Sixth quantum number lower state (5)
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Note (1): One line entry per spectral line in the CALPGM catalog format. Go
to http://spec.jpl.nasa.gov/ for more details.
Note (2): Relative to the lowest energy spin, rotation level in ground vibronic
state.
Note (3): A negative value flags that the line frequency has been measured in
the laboratory. The absolute value of Species is then the species tag and
e_Freq is the reported experimental error. The three most significant
digits of the species tag are coded as the mass number of the species.
Note (4): Identifies the format of the quantum numbers given in the fields QN.
These quantum number formats are given in Section 5 and are different from
those in the first two editions of the catalog.
Note (5): According to QnF.
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History:
From electronic version of the journal
(End) Prepared by [AAS]; Sylvain Guehenneux [CDS] 13-Apr-2016