J/A+A/540/A2 Refractive index of hydrocarbon solids (Jones, 2012)
Variations on a theme - the evolution of hydrocarbon solids.
II. Optical property modelling - the optEC(s) model.
Jones A.
<Astron. Astrophys. 540, A2 (2012)>
=2012A&A...540A...2J 2012A&A...540A...2J
ADC_Keywords: Interstellar medium ; Models
Keywords: dust, extinction - ISM: general
Abstract:
The properties of hydrogenated amorphous carbon (a-C:H) dust are known
to evolve in response to the local conditions.
We present an adaptable model for the determination of the optical
properties of low-temperature, interstellar a-C:H grains that is based
on the fundamental physics of their composition.
Description:
The imaginary part of the complex refractive index m(n,k), k, for
a-C:H materials, from 50eV to cm wavelengths, is derived and the real
part, n, of the complex refractive index m(n,k) is then calculated
using the Kramers-Kronig relations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
optecsn.dat 159 1000 *Real part of the refractive index data
optecsk.dat 159 1000 *Imaginary part of the refractive index data
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Note on *.dat: for a suite of a-C:H materials predicted by the optEC(s) model
as a function of wavelength [micron], energy E [eV] and band gap Eg [eV].
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See also:
J/A+A/542/A98 : Hydrocarbon solids. optEC(s) model. II. (Jones, 2012)
Byte-by-byte Description of file: optecsn.dat
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Bytes Format Units Label Explanations
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1- 9 E9.4 um lambda Wavelength
11- 19 E9.4 eV E Energy equivalent to wavelength
21- 29 E9.4 --- n0 Real part of m(n,k) Eg = -0.1 eV (Eg-)
31- 39 E9.4 --- n1 Real part of m(n,k) Eg = 0.0 eV
41- 49 E9.4 --- n2 Real part of m(n,k) Eg = 0.1 eV
51- 59 E9.4 --- n3 Real part of m(n,k) Eg = 0.25 eV
61- 69 E9.4 --- n4 Real part of m(n,k) Eg = 0.5 eV
71- 79 E9.4 --- n5 Real part of m(n,k) Eg = 0.75 eV
81- 89 E9.4 --- n6 Real part of m(n,k) Eg = 1.0 eV
91- 99 E9.4 --- n7 Real part of m(n,k) Eg = 1.5 eV
101-109 E9.4 --- n8 Real part of m(n,k) Eg = 1.15 eV
111-119 E9.4 --- n9 Real part of m(n,k) Eg = 1.75 eV
121-129 E9.4 --- n10 Real part of m(n,k) Eg = 2.0 eV
131-139 E9.4 --- n11 Real part of m(n,k) Eg = 2.25 eV
141-149 E9.4 --- n12 Real part of m(n,k) Eg = 2.5 eV
151-159 E9.4 --- n13 Real part of m(n,k) Eg = 2.67 eV (Eg+)
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Byte-by-byte Description of file: optecsk.dat
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Bytes Format Units Label Explanations
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1- 9 E9.4 um lambda Wavelength
11- 19 E9.4 eV E Energy equivalent to wavelength
21- 29 E9.4 --- k0 Imaginary part of m(n,k) Eg = -0.1 eV (Eg-)
31- 39 E9.4 --- k1 Imaginary part of m(n,k) Eg = 0.0 eV
41- 49 E9.4 --- k2 Imaginary part of m(n,k) Eg = 0.1 eV
51- 59 E9.4 --- k3 Imaginary part of m(n,k) Eg = 0.25 eV
61- 69 E9.4 --- k4 Imaginary part of m(n,k) Eg = 0.5 eV
71- 79 E9.4 --- k5 Imaginary part of m(n,k) Eg = 0.75 eV
81- 89 E9.4 --- k6 Imaginary part of m(n,k) Eg = 1.0 eV
91- 99 E9.4 --- k7 Imaginary part of m(n,k) Eg = 1.5 eV
101-109 E9.4 --- k8 Imaginary part of m(n,k) Eg = 1.15 eV
111-119 E9.4 --- k9 Imaginary part of m(n,k) Eg = 1.75 eV
121-129 E9.4 --- k10 Imaginary part of m(n,k) Eg = 2.0 eV
131-139 E9.4 --- k11 Imaginary part of m(n,k) Eg = 2.25 eV
141-149 E9.4 --- k12 Imaginary part of m(n,k) Eg = 2.5 eV
151-159 E9.4 --- k13 Imaginary part of m(n,k) Eg = 2.67 eV (Eg+)
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History:
* 13-Mar-2012: First version
* 15-Aug-2012: Corrected version, from author
Acknowledgements:
Anthony Jones, Anthony.Jones(at)ias.u-psud.fr
References:
Jones, Paper I, 2012A&A...540A...1J 2012A&A...540A...1J
Jones, Paper III, 2012A&A...542A..98J 2012A&A...542A..98J, Cat. J/A+A/542/A98
(End) Anthony Jones [IAS], Patricia Vannier [CDS] 16-Feb-2012