Transcript Presentation

Cosmo-chemistry
(LOW ENERGY) COSMIC RAYS
W. R. Webber
ApJ 1998
GAS-ION CHEMISTRY
TURBULENT HEATING (CH+)
The CH+ Abundance in Turbulent, Di ffuse Molecular Clouds
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F i gu r e 1. L ogarit hm of t he t ot al column densit y H t hrough t he comput at ional domain along t he direct ion. T he simulat ion dat a
has been scaled such t hat t he mean H is 1 83 1021 cm 2 . T he size of t he box is indicat ed on t he and axes.
isothermal
The CH+ Abundance in Turbulent, Di ffuse Molecular Clouds
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F i gu r e 7. L eft - t he color scale shows t he fract ion of t he t ot al mass in each logarit hmi cally-spaced
d bin. T he black cont ours show
t he region of phase space in which 99, 90, 50, 10, and 1 percent of t he CH + is found. M iddle - same, but for
H . Right - same, but
for d
H.