J/A+AS/117/557      Einstein coefficients for CO transitions (Chandra+ 1996)
Einstein A-coefficients for vib-rotational transitions in CO
     Chandra S., Maheshwari V.U., Sharma A.K.
    <Astron. Astrophys. Suppl. Ser. 117, 557 (1996)>
    =1996A&AS..117..557C 1996A&AS..117..557C      (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: ISM: molecules - molecular data

Description:
    Einstein A-coefficients for vib-rotational transitions in CO
    isotopomers, for vibrational quantum number v up to 20, rotational
    quantum number J up to 140, and {DELTA}v up to 4, are calculated. The
    change in J is governed by the selection rules {DELTA}J=±1. These
    coefficients play an important role in astronomy, as CO is the most
    abundant molecule after H2, and has been observed in almost all
    the astronomical objects.

File Summary:
--------------------------------------------------------------------------------
  FileName      Lrecl  Records   Explanations
--------------------------------------------------------------------------------
ReadMe             80        .   This file
table2a            49    23660    Einstein A-coefficient, energy of lower level,
                                   and frequency of transition for C12O16
table2b            49    23660    Einstein A-coefficient, energy of lower level,
                                   and frequency of transition for C12O17
table2c            49    23660    Einstein A-coefficient, energy of lower level,
                                   and frequency of transition for C12O18
table2d            49    23660    Einstein A-coefficient, energy of lower level,
                                   and frequency of transition for C13O16
--------------------------------------------------------------------------------

See also:
    J/A+AS/114/175 : Einstein A-coefficient for vibrational transitions in CS
    J/A+AS/131/137 : Einstein A-Coefficients in SiC2 transitions (Chandra+ 1998)

Byte-by-byte Description of file: table2a table2b table2c table2d
--------------------------------------------------------------------------------
   Bytes Format Units   Label     Explanations
--------------------------------------------------------------------------------
   2-  3  I2    ---     Vlow      Vibrational quantum number of the lower level
   5-  7  I3    ---     Jlow      Rotational quantum number of the lower level
   9- 10  I2    ---     Vup       Vibrational quantum number of the upper level
  12- 14  I3    ---     Jup       Rotational quantum number of the upper level
  18- 25  D8.2  s-1     A         Einstein A-coefficient
  28- 37  F10.4 cm-1    Elow      Energy of the lower level of the transition
  41- 49  F9.4  cm-1    Freq      Frequency of the transition
--------------------------------------------------------------------------------

Courtesy: Suresh Chandra  
(End)                                        Patricia Bauer  [CDS]   08-Dec-1995


  
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