ASTR300B Collisions 2017 - University of...
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3/26/17 1 Maxwell Boltzmann Distribu:on Number of Par:cles Reduced mass of par:cles with rela:ve speeds v Example Neutral (H or H 2 ) Collision Rates Spitzer Physical Processes in the ISM
Transcript of ASTR300B Collisions 2017 - University of...
3/26/17
1
Maxwell Boltzmann Distribu:on Num
ber o
f Par:cles Reduced mass of par:cles
with rela:ve speeds v
Example Neutral (H or H2) Collision Rates
Spitzer -‐ Physical Processes in the ISM
3/26/17
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Table of Collision Strengths with e-‐
Spitzer -‐ Physical Processes in the ISM
Leiden Collision Rate Database
3/26/17
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Table of Ion Cri:cal Densi:es with e-‐
Cri:cal Densi:es for Molecules Op#cally thin cri#cal density for collisions with H2 (Shirley 2015)