J/ApJ/799/115 Absorption spectrum of SO up to 2.5THz (Martin-Drumel+, 2015)
A complete spectroscopic characterization of SO and its isotopologues up to
the terahertz domain.
Martin-Drumel M.A., Hindle F., Mouret G., Cuisset A., Cernicharo J.
<Astrophys. J., 799, 115 (2015)>
=2015ApJ...799..115M 2015ApJ...799..115M
ADC_Keywords: Atomic physics
Keywords: ISM: lines and bands; ISM: molecules; line: identification;
molecular data
Abstract:
In order to obtain accurate terahertz center frequencies for SO and
its isotopologues, we have studied the absorption spectrum of SO,
34SO, and 33SO up to 2.5THz using continuous-wave terahertz
photomixing based on a frequency comb providing an accuracy down to
10kHz. Sulfur monoxide was produced in a radio frequency discharge of
air in a cell containing pure sulfur. Together with the strong
absorption signal of the main isotopologue, transitions of 34SO
(34S: 4.21%) and 33SO (33S: 0.75%) were observed in natural
abundance. The newly observed transitions constitute an extension of
the observed rotational quantum numbers of the molecule toward higher
N values, allowing an improvement of the molecular parameters for the
three species. An isotopically invariant fit has been performed based
on pure rotational and ro-vibrational transitions of all SO
isotopologues, enabling their accurate line position prediction at
higher frequencies. Thanks to this new set of parameters, it is now
possible to predict with very high accuracy the frequencies of the
ro-vibrational lines. This should enable the research of SO in the
mid-IR using ground-based IR telescopes, space-based telescope
archives (Infrared Space Observatory, Spitzer), and future space
missions such as the James Webb Space Telescope. This set of
parameters is particularly well adapted for the detection of SO lines
in O-rich evolved stars or in molecular clouds in absorption against
bright IR sources.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6.dat 81 1766 Pure rotation and ro-vibration transitions of SO
included in the isotopically invariant fit
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See also:
J/A+A/563/L3 : NGC1333-IRAS2A CALYPSO IRAM-PdBI SiO & SO maps (Codella+, 2014)
J/A+A/531/A103 : Collisional excitation of sulfur dioxide (Cernicharo+, 2011)
J/A+A/475/549 : AFGL 2591 maps in CS, SO and HCN lines (Benz+, 2007)
J/A+A/358/257 : Molecular clouds SO and CS obs. II. (Nilsson+, 2000)
J/A+A/305/960 : Interstellar S isotopes (Chin+, 1996)
http://www.astro.uni-koeln.de/cdms : CDMS home page
Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- AS [32/36] Sulfur isotope (1)
3 A1 --- --- [S]
4- 5 I2 --- AO [16/18] Oxygen isotope (1)
6 A1 --- --- [O]
8- 9 I2 --- N' [0/65] Ro-vibrational upper level N quantum number
11- 12 I2 --- J' [0/66] Ro-vibrational upper level J quantum number
14- 15 I2 --- v' [0/33] Upper level vibrational state
17- 18 I2 --- N" [0/64] Ro-vibrational lower level N quantum number
20- 21 I2 --- J" [0/65] Ro-vibrational lower level J quantum number
23- 24 I2 --- v" [0/33] Lower level vibrational state
26- 29 A4 --- x_nuObs Unit of nuObs (MHz or cm-1)
31- 44 F14.6 --- nuObs [44.3/2511991] Observed frequency (in cm-1 or MHz)
46- 51 F6.5 --- e_nuObs [0/0.5] Uncertainty on nuObs
53- 71 A19 --- BibCode ADS bibcode if any
73- 81 A9 --- Ref Other reference (2)
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Note (1): the original table contained values 1 to 4 for the S isotope,
and 5 to 7 for the O isotope; these codes have been replaced by the
actual values at CDS.
Note (2): Other reference as follows:
This work = this paper: 2015ApJ...799..115M 2015ApJ...799..115M
2013EAS = 2013, Martin-Drumel et al., EAS Publications Series, 58, 279-282
CDMS = Cologne Database for Molecular Spectroscopy (CDMS) website;
Muller et al. 2001A&A...370L..49M 2001A&A...370L..49M
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 16-Jun-2015