Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-02-18
Astrophys.J.591:258-266,2003
Astronomy and Astrophysics
Astrophysics
13 pages, 5 figures, small revisions, accepted to ApJ
Scientific paper
10.1086/375344
The photoelectric heating is believed to be the main heating mechanism in cool HI clouds. The heating rate can be estimated through observations of the [CII] line emission, since this is the main coolant in regions where the photoelectric effect dominates the heating. Comparison of the [CII] emission with the far-infrared (FIR) emission allows to constrain the efficiency of the photoelectric heating, using model calculations that take into account the strength of the radiation field. Recent [CII] observations carried out with the ISO satellite have made this study possible. In this work we study the correlation between FUV absorption and FIR emission using three-dimensional models. The density distributions are obtained with numerical simulations of compressible magneto-hydrodynamic turbulence, with rms sonic Mach numbers 0.6
Jimenez Raul
Juvela Mika
Padoan Paolo
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