J/ApJS/86/713 IR spectroscopy of ices (Hudgins+, 1993)
Mid- and far-infrared spectroscopy of ices: optical constants and integrated
absorbances
Hudgins D.M., Sandford S.A., Allamandola L.J., Tielens A.G.G.M.
<Astrophys. J. Suppl. Ser. 86, 713 (1993)>
=1993ApJS...86..713H 1993ApJS...86..713H
ADC_Keywords: Interstellar medium; Spectra, infrared
Keywords: line: identification - molecular data
Abstract:
Laboratory spectra through the mid-infrared (4000 to 500cm-1
[2.5-20 micron]) have been used to calculate the optical constants
(n and k) and integrated absorption coefficients (A) for a variety of
pure and mixed molecular ices of relevance to astrophysics. The ices
studied were H2O, CH3OH, CO2, OCS, CH4, CO2+CH4, CO2+OCS, CO+CH4,
CO+OCS, O2+CH4, O2+OCS, N2+CH4, N2+OCS, H2O+CH4, H2O+OCS, and
H2O+CH3OH+CO+NH3. In addition, the measurements have been extended
through the far-infrared (500 to 50cm1 [20-200 micron]) for the H2O,
CH3OH, and H2O+CH3OH+NH3 ices.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
summary.dat 22 77 Summary of spectra
fig2.dat 29 23178 H2O:CH3OH:CO:NH3 = 100:10:1:1 Ice Mixture
(Weak Interstellar Mix) percentage transmission
fig3.dat 29 23178 H2O:CH3OH:CO:NH3 = 100:50:1:1 Ice Mixture
(Strong Interstellar Mix) percentage transmission
fig4.dat 29 19548 Pure CH3OH Ice percentage transmission
fig5.dat 29 23175 Pure H2O Ice percentage transmission
fig6.dat 29 16797 Pure CH4 Ice percentage transmission
fig7.dat 29 14520 Pure CO2 Ice percentage transmission
fig8.dat 29 7467 Pure OCS Ice percentage transmission
fig9.dat 29 20736 CO:CH4 = 20:1 Ice Mixture percentage transmission
fig10.dat 29 3736 CO:OCS = 20:1 Ice Mixture percentage transmission
fig11.dat 29 34215 CO2:CH4= 20:1 Ice Mixture percentage transmission
fig12.dat 29 21774 CO2:OCS= 20:1 Ice Mixture percentage transmission
fig13.dat 29 22398 H2O:CH4= 20:1 Ice Mixture percentage transmission
fig14.dat 29 18150 H2O:OCS= 20:1 Ice Mixture percentage transmission
fig15.dat 29 21780 H2O:OCS= 2:1 Ice Mixture percentage transmission
fig16.dat 29 9954 N2:CH4 = 20:1 Ice Mixture percentage transmission
fig17.dat 29 9540 N2:OCS = 20:1 Ice Mixture percentage transmission
fig18.dat 29 14931 O2:CH4 = 20:1 Ice Mixture percentage transmission
fig19.dat 29 9538 O2:OCS = 20:1 Ice Mixture percentage transmission
table2.dat 35 23175 H2O:CH3OH:CO:NH3 = 100:10:1:1 Ice Mixture
(Weak Interstellar Mix) optical constants
table3.dat 35 23175 H2O:CH3OH:CO:NH3 = 100:50:1:1 Ice Mixture
(Strong Interstellar Mix) optical constants
table4.dat 35 19546 Pure CH3OH Ice optical constants
table5.dat 35 8868 Pure H2O Ice optical constants
table6.dat 35 13992 Pure CH4 Ice optical constants
table7.dat 35 14520 Pure CO2 Ice optical constants
table8.dat 35 7776 Pure OCS Ice optical constants
table9.dat 35 14092 CO:CH4 = 20:1 Ice Mixture optical constants
table10.dat 35 7468 CO:OCS = 20:1 Ice Mixture optical constants
table11.dat 45 21775 CO2:CH4 = 20:1 Ice Mixture optical constants
table12.dat 35 11873 CO2:OCS = 20:1 Ice Mixture optical constants
table13.dat 35 14520 H2O:CH4 = 20:1 Ice Mixture optical constants
table14.dat 35 12100 H2O:OCS = 20:1 Ice Mixture optical constants
table15.dat 35 21774 H2O:OCS = 2:1 Ice Mixture optical constants
table16.dat 35 7466 N2:CH4 = 20:1 Ice Mixture optical constants
table17.dat 35 9540 N2:OCS = 20:1 Ice Mixture optical constants
table18.dat 35 10890 O2:CH4 = 20:1 Ice Mixture optical constants
table19.dat 35 4770 O2:OCS = 20:1 Ice Mixture optical constants
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Byte-by-byte Description of file: summary.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Tno [2/19] Table/figure number (1)
5- 7 I3 K T [10/140] Temperature of the ice
9- 15 F7.2 cm-1 Smin Lower bound of the frequency
17- 22 F6.1 cm-1 Smax Upper bound of the frequency
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Note (1): the number corresponds to the composition of the ice as follows:
2 = H2O:CH3OH:CO:NH3 (100:10:1:1) weak interstellar mix
3 = H2O:CH3OH:CO:NH3 (100:50:1:1) strong interstellar mix
4 = CH3OH (methanol) ice
5 = H2O (water) ice
6 = CH4 (methane) ice
7 = CO2 (carbon dioxide) ice
8 = OCS (carbonyl sulfide) ice
9 = CO:CH4 (20:1) carbon monoxide + methane ice mixture
10 = CO:OCS (20:1) carbon monoxide + carbonyl sulfide ice mixture
11 = CO2:CH4 (20:1) carbon dioxide + methane ice mixture
12 = CO2:OCS (20:1) carbon dioxide + carbonyl sulfide ice mixture
13 = H2O:CH4 (20:1) water + methane ice mixture
14 = H2O:OCS (20:1) water + carbonyl sulfide ice mixture
15 = H2O:OCS (2:1) water + carbonyl sulfide ice mixture
16 = N2:CH4 (20:1) nitrogen + methane ice mixture
17 = N2:OCS (20:1) nitrogen + carbonyl sulfide ice mixture
18 = O2:CH4 (20:1) oxygen + methane ice mixture
19 = O2:OCS (20:1) oxygen + carbonyl sulfide ice mixture
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Byte-by-byte Description of file: fig*.dat
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Bytes Format Units Label Explanations
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2- 4 I3 K Temp [10/140] Temperature
8- 15 F8.3 cm-1 nu [50/4000] Frequency
23- 29 F7.3 % T Percentage of transmission
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Byte-by-byte Description of file: table?.dat table1[023456789].dat
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Bytes Format Units Label Explanations
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2- 4 I3 K Temp [10/140] Temperature
7- 14 F8.3 cm-1 nu [50/4000] Frequency
16- 24 F9.7 --- n Real part of the index of refraction (1)
25- 35 E11.8 --- k ? Imaginary part of the index of refraction
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Note (1): The index of refraction is the complex number n + ik
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
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1- 3 I3 K Temp [10/140] Temperature
5- 12 F8.3 cm-1 nu1 [50/4000] Frequency nu1
18- 24 F7.5 --- n(nu1) Real part of the index of refraction for
frequency nu1 (1)
27- 34 F8.3 cm-1 nu2 ? [50/4000] Frequency nu2
35- 45 E11.5 --- k(nu2) ? Imaginary part of the index of refraction
for frequency nu2
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Note (1): The index of refraction is the complex number n + ik
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History:
* 16-Sep-1994: Created from AAS CD-ROM#1
* 08-Oct-2011: ReadMe revisited, added file "summary.dat"
(End) Patricia Bauer, Francois Ochsenbein [CDS] 16-Sep-1994