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J/A+A/358/257       Molecular clouds SO and CS obs. II.      (Nilsson+, 2000)

SO and CS observations of molecular clouds. II. Analysis and modelling of the abundance ratios - probing O2/CO with SO/CS? Nilsson A., Hjalmarson A., Bergman P., Millar T.J. <Astron. Astrophys. 358, 257 (2000)> =2000A&A...358..257N
ADC_Keywords: Abundances ; Interstellar medium ; Radio sources Keywords: ISM: clouds - ISM: molecules - ISM: abundances - ISM: structure Abstract: We here analyse the observational SO and CS data presented in Nilsson et al. (2000A&AS..144..441N). The SO/CS integrated intensity ratio maps are presented for 19 molecular clouds, together with tables of relevant ratios at strategic positions, where w e have also observed 34SO and/or C34S. Description: In the article we present a comparison between observations and chemical models. The modelled observations are presented in the article and the images for the time-dependent chemical modelling results are presented here. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 02 25 30.9 +62 06 21 W3(IRS4) 02 27 04.1 +61 52 22 W3(OH) 03 29 02.0 +31 20 54 NGC 1333 05 35 17.4 -05 23 28 Orion A 05 35 27 -05 10 06 OMC 2 05 45 15 -05 00 18 OMC 3 05 41 37.9 -02 15 52 NGC 2023 05 41 43.5 -01 54 17 NGC 2024 05 46 46.7 +00 00 50 NGC 2068 05 47 04.4 +00 21 19 NGC 2071 06 07 46.3 -06 23 09 Mon R2 06 41 09.7 +09 29 36 NGC 2264 IR 18 53 18.5 +01 14 57 G 34.3+0.2 19 10 13.2 +09 06 12 W 49N 19 23 40.0 +14 30 51 W 51N 20 39 00.9 +42 22 38 DR 21(OH) 21 40 42.4 +58 16 10 IRAS 21391+5802 22 19 18.1 +63 18 49 S 140 23 13 45.3 +61 28 10 NGC 7538 (IRS 1) ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.ps 132 105 SIMBAD objects and sign captions as displayed in the ratio maps, Figs. 1a-v table2.dat 77 22 Maxima and minima of SO/CS integrated intensity ratios table3.dat 80 92 Integrated intensity ratios (A-E) and estimated abundance ratios (F) at certain positions tab2-3.tex 79 247 LaTeX version of tables 2 & 3 fig4.ps 96 1088 Species abundances vs time (O/C+ = 2.4) fig5.ps 96 566 SO/CS abundance ratio vs time (O/C+ = 2.4) fig6.ps 96 918 SO/CS abundance ratio vs time for different O/C+ ratios fig7.ps 96 614 O2/SO abundance ratio vs time (O/C+ = 2.4) fig8.ps 96 566 O2/CO abundance ratio vs time (O/C+ = 2.4) fig9.ps 96 918 O2/CO abundance ratio vs time for different O/C+ ratios fig10.ps 96 831 SO/CS abundance ratio vs time for different cloud densities fig11.ps 96 918 SO/CS abundance ratio vs time for different ionization rate scaling factors F, F = 1 for standard C.R. flux fig12.ps 96 918 SO/CS abundance ratio vs time for different initial S+ abundances fig13.ps 96 831 O2/CO abundance ratio vs time for different cloud densities fig14.ps 96 918 O2/CO abundance ratio vs time for different ionization rate scaling factors F, F = 1 for standard C.R. flux fig15.ps 96 918 O2/CO abundance ratio vs time for different initial S+ abundances fig16.ps 96 1002 H3+ fractional abundance vs time for different ionization rate scaling factors F, F=1 for standard C.R. flux fig17.ps 96 1002 C fractional abundance vs time for different ionization rate scaling factors F fig18.ps 96 948 CS fractional abundance vs time for different ionization rate scaling factors F fig19.ps 96 918 OH fractional abundance vs time for different ionization rate scaling factors F fig20.ps 96 1020 C+ fractional abundance vs time for different ionization rate scaling factors F fig21.ps 96 966 h2O fractional abundance vs time for different ionization rate scaling factors F all.ps 132 16324 table 1 and figures 4 to 21
See also: J/A+AS/144/441 : Molecular clouds SO and CS obs. I. (Nilsson+, 2000) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 15 A15 --- Source Source name 17- 27 A11 ---- n_Source Note (isotopomers or Residual) 29- 30 I2 h RAh Right ascension (J2000.0) 32- 33 I2 min RAm Right ascension (J2000.0) 35- 38 F4.1 s RAs Right ascension (J2000.0) 40 A1 --- DE- Declination sign (J2000.0) 41- 42 I2 deg DEd Declination (J2000.0) 44- 45 I2 arcmin DEm Declination (J2000.0) 47- 48 I2 arcsec DEs Declination (J2000.0) 50- 53 I4 arcsec ORAMax Maximum offset in right ascension 55- 58 I4 arcsec ODEMax Maximum offset in declination 60- 63 F4.2 --- RatioMax Maximum ratio of SO/CS 65- 67 I3 arcsec ORAMin Minimum offset in right ascension 69- 72 I4 arcsec ODEMin Minimum offset in declination 74- 77 F4.2 --- RatioMin Minimum ratio of SO/CS
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 15 A15 --- Source Source name 18- 21 I4 arcsec ORA Offset in right ascension from source 23- 26 I4 arcsec ODE Offset in declination from source 28- 31 F4.1 --- RatioA ? SO(32-21)/34SO(32-21) ratio 33- 35 F3.1 --- e_RatioA ? rms uncertainty on RatioA (1) 37- 40 F4.1 --- RatioB ? CS(2-1)/C34S(2-1) ratio 42- 44 F3.1 --- e_RatioB ? rms uncertainty on RatioB (1) 46- 49 F4.2 --- RatioC ? SO(32-21)/CS(2-1) ratio 51- 54 F4.2 --- e_RatioC ? rms uncertainty on RatioC (1) 56- 59 F4.2 --- RatioD ? 34SO(32-21)/C34S(2-1) ratio 61- 64 F4.2 --- e_RatioD ? rms uncertainty on RatioD (1) 66- 69 F4.2 --- RatioE ? Adopted SO/CS ratio (2) 71- 74 F4.2 --- e_RatioE ? rms uncertainty on RatioE (1) 76 A1 --- Note [abcd] Note (3) 78- 80 F3.1 --- RadioF Ratio [SO]/[CS]
Note (1): An error of (0.00) means 1σ error <0.005 Note (2): Adopted SO/CS ratio, calculated for optically thin lines, Tex=20K (see text). Note (3): Explanations of the adopted SO/CS ratio: a: 34SO(32-21)/C34S(2-1) b: SO(32-21)/(22 x C34S(2-1)) c: 22 x 34SO(32-21)/CS(2-1) d: SO(32-21)/CS(2-1)
Acknowledgements: Per Bergman
(End) Patricia Bauer [CDS] 22-Jun-2000
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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