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J/A+AS/119/111     Molecular abundances in dense interstellar clouds (Lee+ 1996)
Fractional abundances of molecules in dense interstellar clouds: a
compendium of recent model results
     Lee H.-H., Bettens R.P.A., Herbst E.
    <Astron. Astrophys. Suppl. Ser. 119, 111 (1996)>
    =1996A&AS..119..111L
ADC_Keywords: Interstellar medium ; Abundances

Keywords: ISM: clouds - ISM: abundances - ISM: molecules - molecular processes


Abstract:
    In this paper we present calculated fractional abundances in dense
    interstellar clouds for selected atomic and molecular species using
    three different homogeneous, pseudo-time-dependent models discussed by
    Bettens, Lee, & Herbst (1995): the new standard model, the new
    neutral-neutral model, and model 4. We have run each model with 3
    different hydrogen densities - 1,000; 10,000; and 100,000cm-3 - and
    two temperatures - 10K and 50K. "Low metal" elemental abundances
    have been used for all three models; the new standard model has also
    been run with "high metal" abundances.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
tables.tex       129     5043   All tables in latex
table2a.dat       48      280   New standard model: n=10+3 cm-3,T=10K
table2b.dat       48      280   New standard model: n=10+3 cm-3,T=50K
table3a.dat       48      280   New standard model: n=10+4 cm-3,T=10K
table3b.dat       48      280   New standard model: n=10+4 cm-3,T=50K
table4a.dat       48      280   New standard model: n=10+5 cm-3,T=10K
table4b.dat       48      280   New standard model: n=10+5 cm-3,T=50K
table5a.dat       48      280   New neutral-neutral model: n=10+3 cm-3,T=10K
table5b.dat       48      280   New neutral-neutral model: n=10+3 cm-3,T=50K
table6a.dat       48      280   New neutral-neutral model: n=10+4 cm-3,T=10K
table6b.dat       48      280   New neutral-neutral model: n=10+4 cm-3,T=50K
table7a.dat       48      280   New neutral-neutral model: n=10+5 cm-3,T=10K
table7b.dat       48      280   New neutral-neutral model: n=10+5 cm-3,T=50K
table8a.dat       48      280   Model 4: n=10+3 cm-3,T=10K
table8b.dat       48      280   Model 4: n=10+3 cm-3,T=50K
table9a.dat       48      280   Model 4: n=10+4 cm-3,T=10K
table9b.dat       48      280   Model 4: n=10+4 cm-3,T=50K
table10a.dat      48      280   Model 4: n=10+5 cm-3,T=10K
table10b.dat      48      280   Model 4: n=10+5 cm-3,T=50K
table11a.dat      48      280   New standard model(high metal): n=10+3 cm-3,T=10K
table11b.dat      48      280   New standard model(high metal): n=10+3 cm-3,T=50K
table12a.dat      48      280   New standard model(high metal): n=10+4 cm-3,T=10K
table12b.dat      48      280   New standard model(high metal): n=10+4 cm-3,T=50K
table13a.dat      48      280   New standard model(high metal): n=10+5 cm-3,T=10K
table13b.dat      48      280   New standard model(high metal): n=10+5 cm-3,T=50K
standard.dat      56     1680   New standard model (tables 2,3,4)
neu_neu.dat       56     1680   New neutral-neutral model (tables 5,6,7)
model4.dat        56     1680   Model4 (Bettens 1995ApJ...443..664B) tables 8,9,10
high_met.dat      56     1680   New standard model(high metal) (tables 11,12,13)


Byte-by-byte Description of file: table*.dat

   Bytes Format  Units   Label    Explanations

   1-  8  A8     ---     Species  Species name
  11- 18  E8.3   ---     A4.5     Fractional abundances at 10+4.5 years
  21- 28  E8.3   ---     A5       Fractional abundances at 10+5 years
  31- 38  E8.3   ---     A5.5     Fractional abundances at 10+5.5 years
  41- 48  E8.3   ---     Asts     Fractional abundances at steady state


Byte-by-byte Description of file: standard.dat neu_neu.dat
Byte-by-byte Description of file: model4.dat high_met.dat

   Bytes Format Units   Label     Explanations

   1-  4  E4.1  cm-3    nH        [1.e3,1.e5] Density
   6-  7  I2    K       T         [10,50] Cloud temperature
   9- 16  A8    ---     Species   Species name
  19- 26  E8.3  ---     A4.5      Fractional abundances at 10+4.5 years
  29- 36  E8.3  ---     A5        Fractional abundances at 10+5 years
  39- 46  E8.3  ---     A5.5      Fractional abundances at 10+5.5 years
  49- 56  E8.3  ---     Asts      Fractional abundances at steady state


References:
   Bettens, Lee, & Herbst, 1995, ApJ 443, 664       =1995ApJ...443..664B

Courtesy: H.H. Lee 


History:
  * 23-Aug-2004: addition of files grouped by model
    (standard.dat neu_neu.dat file: model4.dat highmetal.dat)
(End)                                                          [CDS] 15-Feb-1996