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CO Excitation Workshop. PDR Benchmark Progress. Starting Point PDR-1 (n=10 3 , =10). Starting Point PDR-2 (n=10 3 , =10 5 ). Starting Point PDR-3 (n=10 5.5 , =10). Starting Point PDR-4 ( n=10 5.5 , =10 5 ). Starting Point PDR-5 ( n=10 7 , =10 ). PDR 4, high n, high FUV.

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Co excitation workshop

CO Excitation Workshop

PDR Benchmark Progress


Starting point pdr 1 n 10 3 10
Starting Point PDR-1 (n=103,=10)


Starting point pdr 2 n 10 3 10 5
Starting Point PDR-2 (n=103,=105)


Starting point pdr 3 n 10 5 5 10
Starting Point PDR-3 (n=105.5,=10)


Starting point pdr 4 n 10 5 5 10 5
Starting Point PDR-4 (n=105.5,=105)


Starting point pdr 5 n 10 7 10
Starting Point PDR-5 (n=107,=10)


Pdr 4 high n high fuv
PDR 4, high n, high FUV

Tgas n(CO)

Large modelscatterlooksscary, but modelassumptionswerevastly different.


Heating cooling
Heating/Cooling


Heating cooling1
Heating/Cooling


Pdr 4 high n high fuv1
PDR 4, high n, high FUV

Tgas n(CO)

Duringtheworkshopweconcentrate on the „true“ PDR case #4, andtrytounderstandthedifferences


Pdr 4 high n high fuv2
PDR 4, high n, high FUV

NEW

Tgas n(CO)

Duringtheworkshopweconcentrate on the „true“ PDR case #4, andtrytounderstandthedifferences


Pdr 4 high n high fuv3
PDR 4, high n, high FUV

PE Heating, H2formationheating

Dustcontent

NEW

Tgas n(CO)

Duringtheworkshopweconcentrate on the „true“ PDR case #4, andtrytounderstandthedifferences


Starting point pdr 4 n 10 5 5 10 51
Starting Point PDR-4 (n=105.5,=105)


Starting point pdr 4 n 10 5 5 10 52
Starting Point PDR-4 (n=105.5,=105)

NEW



Additional information1
Additional Information

  • Dusttemperaturesappearconsistent

  • Temperaturerangeforgrainsizedistributionscomparable

  • Relativelyhotdustthroughoutthewholecloud!


Additional information2
Additional Information

  • Major heatingthroughphoto-electricheating

  • NO PAHs !

  • Differencesremain(FUV field?, electrondensity, …)


Additional information3
Additional Information

Major coolants

[OI] gas-graincollisison


Additional information4
Additional Information

Major coolants

[OI] gas-graincollisison


Summary
Summary

  • Giventhecomplexity of thevariouscodesandthevagueness of thebenchmark (round 2) specificstheconvergence of theresultsis still remarkable.

  • Nonewmajorheating/coolingprocesscandidate

  • Major processesare :

    • Dustphysics

    • H2formation

    • FUV??

  • But theirdetailsremaintobeinvestigated


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