Table A.1:
Full capabilities of the PDR model codes participating in the Leiden comparison study.
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GEOMETRY |
spherical |
x |
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x |
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plane-parallel, finite |
x |
|
x |
|
x |
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|
x |
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|
plane-parallel, semi-infinite |
x |
|
x |
x |
x |
|
x |
x |
x |
x |
x |
circumstellar disc |
x |
x |
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|
x |
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|
ensemble of clouds |
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|
x |
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DENSITY |
homogeneous |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
density-law |
x |
x |
x |
x |
|
x |
x |
x |
x |
x |
|
time dependent |
x |
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|
x |
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velocity field |
x |
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x |
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v = const |
x |
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x |
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v= v(r,...) |
x |
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RADIATION |
isotropic radiation field |
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|
x |
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x |
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uni-directional radiation field |
x |
x |
x |
x |
x |
|
x |
x |
x |
x |
x |
combination of isotropic+illuminating star |
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x |
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Habing field |
x |
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|
x |
x |
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x |
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|
x |
Draine field |
x |
x |
x |
|
x |
x |
|
x |
|
x |
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optional star |
x |
|
x |
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x |
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detailed SED |
x |
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x |
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other |
x |
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x |
x |
x |
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|
external radiation source |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
internal radiation source |
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CHEMISTRY |
stationary chemistry |
x |
x |
x |
|
x |
x |
|
x |
|
x |
x |
time-dependent chemistry |
x |
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|
x |
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|
x |
|
x |
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advection flow |
x |
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UMIST95 |
x |
|
x |
x |
|
x |
|
x |
|
x |
x |
UMIST99 |
x |
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|
x |
x |
x |
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|
x |
x |
NSM |
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|
x |
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|
x |
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x |
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other database |
x |
x |
x |
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|
x |
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x |
|
x |
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fixed number of species |
x |
x |
|
x |
x |
|
x |
|
x |
x |
|
variable number of species |
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|
x |
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|
x |
|
x |
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|
x |
number of species |
96 |
48 |
|
128 |
46 |
|
577 |
|
419 |
78 |
|
PAH's included |
x |
|
x |
|
x |
x |
|
x |
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|
x |
freeze-out on grains included |
x |
x |
x |
x |
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|
x |
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H2 formation on grains |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
formation of other molecules on grains |
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|
x |
x |
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x |
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desorption mechanisms included |
|
x |
x |
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x |
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thermal desorption |
x |
x |
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x |
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photoevaporation |
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x |
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CR spot heating |
x |
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x |
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x |
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grain-grain collisions |
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x |
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metallicity included |
x |
x |
x |
x |
x |
x |
|
x |
|
x |
x |
ISOTOPOMERS |
13C |
x |
|
x |
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|
x |
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x |
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x |
17O |
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18O |
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x |
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x |
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x |
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D |
x |
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x |
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x |
x |
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THERMAL BALANCE |
fixed temperature |
x |
x |
x |
x |
|
x |
|
x |
x |
x |
x |
temperature determined from energy balance |
x |
x |
x |
x |
x |
x |
x |
x |
|
x |
x |
COOLING |
gas-grain cooling |
x |
x |
x |
x |
x |
x |
x |
x |
|
x |
x |
radiative recombination |
x |
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x |
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x |
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x |
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chemical balance |
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x |
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[OI] lines |
x |
x |
x |
x |
x |
x |
x |
x |
|
x |
x |
12CO rotational lines |
x |
x |
x |
x |
x |
x |
x |
x |
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x |
13CO rotational lines |
x |
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x |
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x |
x |
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x |
[CII] line |
x |
x |
x |
x |
x |
x |
x |
x |
|
x |
x |
[CI] lines |
x |
x |
x |
x |
x |
x |
x |
x |
|
x |
x |
[SiII] lines |
x |
|
x |
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x |
x |
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x |
x |
OH rotational lines |
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x |
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x |
x |
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x |
x |
H2O rotational lines |
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x |
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x |
x |
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x |
x |
H2 rotational lines |
x |
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x |
x |
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x |
x |
HD rotational lines |
x |
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x |
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[OI] 6300
metastable lines |
x |
x |
x |
x |
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x |
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x |
x |
CH rotational lines |
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x |
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x |
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Ly
metastable lines |
x |
x |
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x |
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x |
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x |
Fe(24 ,34 ), [FeII](26 ,35.4 ) |
x |
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x |
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x |
x |
H2 (rot-vib) |
x |
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x |
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x |
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x |
x |
HEATING |
H2 vibrational deexcitation |
x |
x |
x |
x |
x |
x |
x |
x |
|
x |
x |
single line approx. |
x |
x |
|
x |
x |
|
x |
x |
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|
x |
only n-levels, but no J |
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x |
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x |
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full rot-vib treatment |
x |
|
x |
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x |
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H2 dissociation |
x |
x |
x |
x |
x |
x |
x |
x |
|
x |
x |
H2 formation |
x |
x |
x |
x |
x |
x |
|
x |
|
x |
x |
CR heating |
x |
x |
x |
x |
x |
x |
x |
x |
|
x |
x |
PE heating |
x |
x |
x |
x |
x |
x |
x |
x |
|
x |
x |
XR heating |
x |
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|
x |
x |
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|
x |
PAH heating |
x |
|
x |
x |
x |
x |
|
x |
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|
x |
photoionization |
x |
x |
x |
x |
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|
x |
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|
x |
carbon ionization heating |
x |
x |
x |
x |
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|
x |
|
x |
x |
other species (Si, etc.) |
x |
|
x |
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gas-grain collisions |
x |
x |
x |
x |
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x |
|
x |
x |
turbulence heating |
x |
|
x |
x |
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chemical balance |
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|
x |
x |
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x |
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UV TRANSFER |
solved self-consistently |
x |
x |
x |
x |
x |
x |
|
x |
|
x |
x |
simple exponential attenuation |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
bi-exponential attenuation |
|
x |
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|
x |
|
full RT in lines |
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|
x |
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x |
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DUST |
treatment of rad. transfer |
x |
|
x |
|
x |
x |
|
x |
|
x |
x |
grain size distribution |
x |
|
x |
x |
|
x |
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extinction/scattering law |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
|
albedo |
x |
|
x |
x |
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|
x |
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|
x |
scattering law |
x |
|
x |
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|
x |
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H2 SHIELDING |
shielding factors |
x |
x |
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|
x |
|
x |
|
x |
x |
x |
single line |
x |
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|
x |
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|
x |
detailed solution |
x |
|
x |
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|
x |
|
x |
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CO SHIELDING |
shielding factors |
x |
x |
|
x |
x |
x |
x |
x |
x |
x |
x |
single line |
x |
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|
x |
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|
x |
detailed solution |
|
|
x |
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|
x |
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|
isotope selective photodissociation |
|
|
x |
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|
x |
|
x |
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|
x |
UV PROFILE FUNCTION |
Gaussian |
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|
x |
x |
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Voigt |
x |
|
x |
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x |
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x |
x |
Box |
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other |
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RADIATIVE TRANSFER IN COOLING LINES |
escape probability |
x |
x |
x |
x |
x |
x |
x |
x |
|
x |
x |
other |
|
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|
IR pumping |
x |
x |
|
|
x |
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|
x |
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|
x |
OBSERVATIONAL LINES |
self-consistent treatment with cooling |
x |
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|
x |
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escape probability |
x |
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|
x |
|
x |
x |
x |
|
x |
x |
other |
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|
x |
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|
x |
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|
H2 |
x |
|
x |
|
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|
x |
|
x |
|
HD |
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|
x |
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|
x |
|
x |
|
12CO |
x |
|
x |
x |
x |
x |
x |
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|
x |
13CO |
x |
|
x |
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|
x |
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|
x |
C18O |
|
|
x |
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|
x |
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|
13C18O |
|
|
x |
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|
x |
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[OI] |
x |
|
x |
x |
x |
x |
x |
x |
|
x |
x |
[CII] |
x |
|
x |
x |
x |
x |
x |
x |
|
x |
x |
[CI] |
x |
|
x |
x |
x |
x |
x |
x |
|
x |
x |
Si+ |
x |
|
x |
|
x |
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|
x |
CS |
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|
x |
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|
x |
H2O |
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|
x |
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H218O |
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HCO+ |
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|
x |
|
x |
x |
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|
x |
OH |
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|
x |
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[SiI] |
x |
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x |
x |
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[SI],[SII] |
x |
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|
x |
x |
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|
x |
[FeI], [FeII] |
x |
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|
x |
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|
x |
COMPUTED LINE PROPERTIES |
resolved line profile |
|
|
x |
|
x |
x |
|
x |
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|
|
continuum rad./rad transfer in UV |
x |
|
x |
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|
line center intensities |
x |
|
x |
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|
x |
|
x |
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|
line integrated intensities |
x |
|
x |
x |
x |
x |
|
x |
|
|
x |
optical depths |
x |
|
x |
x |
x |
x |
|
x |
|
|
x |
Gaussian line profile |
x |
|
x |
|
x |
x |
|
x |
|
|
x |
box line profile |
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|
turbulence included |
x |
|
x |
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|
x |
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|
x |
COLLISIONS |
H-H |
x |
|
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|
x |
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|
x |
|
H2-H |
x |
|
x |
x |
x |
|
|
x |
|
x |
x |
H2 - H+ |
x |
|
x |
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|
x |
|
H2 - e |
x |
|
x |
|
x |
|
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|
x |
|
H2 - H2 |
x |
|
x |
|
x |
|
|
x |
|
x |
x |
CO-H |
x |
x |
x |
x |
x |
|
|
x |
|
|
x |
CO-H2 |
x |
x |
x |
x |
x |
x |
|
x |
|
|
x |
CO-e |
x |
x |
|
x |
|
x |
|
|
|
|
x |
CO - He |
|
|
x |
x |
|
|
|
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|
x |
C-H |
x |
x |
x |
x |
x |
x |
|
x |
|
x |
x |
C-H2 |
x |
x |
x |
x |
x |
x |
|
x |
|
|
x |
C-e |
x |
|
x |
x |
|
|
|
|
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|
x |
C - He |
x |
|
x |
x |
|
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|
|
C - H2O |
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|
C+ - H |
x |
x |
x |
x |
x |
|
|
x |
|
|
x |
C+ - H2 |
x |
x |
x |
x |
x |
x |
|
x |
|
|
x |
C+ - e |
x |
x |
|
x |
x |
x |
|
x |
|
|
x |
O - H |
x |
x |
x |
x |
x |
x |
|
x |
|
x |
x |
O - H2 |
x |
x |
x |
x |
x |
x |
|
x |
|
x |
x |
O - H+ |
x |
|
x |
x |
|
|
|
x |
|
|
|
O - e |
x |
x |
x |
x |
x |
|
|
|
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|
|
O - He |
x |
|
x |
x |
|
|
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|
|
OH - H |
|
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|
OH - He |
|
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|
OH - H2 |
|
|
|
|
x |
x |
|
|
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|
|
H- - H |
x |
|
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|
H2O - e |
|
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|
H2O - H |
|
|
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|
|
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|
x |
H2O - H2 |
|
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|
x |
|
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|
|
x |
H2O - O |
|
|
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|
|
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|
|
dust - H/H2 |
x |
|
|
|
x |
|
|
|
|
|
|
dust-any |
x |
|
|
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|
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|
|
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|
|
Si+ - H |
x |
|
x |
|
|
x |
|
|
|
|
|
HD - H |
|
|
x |
|
|
|
|
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|
HD - H2 |
|
|
x |
|
|
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|
|
PAH-any |
x |
|
|
|
x |
|
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|
|
OUTPUT |
abundance profile over (AV/depth) |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
x |
column density over (AV/depth) |
x |
x |
x |
x |
|
x |
|
|
|
x |
x |
temperature profile over (AV/depth) |
x |
x |
x |
x |
x |
x |
x |
x |
|
x |
x |
emitted intensities |
x |
|
x |
x |
x |
x |
|
x |
|
x |
x |
opacities at line center |
|
|
x |
|
x |
x |
|
x |
|
x |
x |
heating and cooling rates over (AV/depth) |
x |
|
x |
x |
|
x |
|
x |
|
x |
x |
chemical rates over (AV/depth) |
|
|
x |
x |
|
x |
|
x |
|
x |
x |
excitation diagram of H2 |
x |
|
x |
|
|
|
|
x |
|
x |
|