Replies: 2 comments
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From: rc***@kn*** (Ryan Challener) Yes, my understanding is that since CIAs are based on the collisions between two molecules, it is dependent on the density of both molecules, hence the square. But as you say the methane opacity is linear with density. The cross-section/CIA reader takes the molecule names from the header (1 for cross-section, 2 for CIAs) and multiplies the interpolated values by the densities of the molecule(s) from the header. So it is able to handle both the square scaling and linear scaling with density. Correct me if I'm wrong, Patricio and Jasmina. -Ryan From: BART-devel <ba***@ph***> on behalf of Joe Harrington <jh***@ph***> Em pointed out in the CIA writeup we're iterating on that CIA optical Is this accounted for in transit? If so, using the same mechanism for --jh-- BART-devel mailing list |
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From: pc***@fu*** (Patricio Cubillos) yup, it does. On Aug 8, 2015, at 12:01 AM, Joe Harrington <jh***@ph***> wrote:
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The following is an archived message from the BART-devel mailing list, which has now closed.
From: jh***@ph*** (Joe Harrington)
Date: Sat, 08 Aug 2015 00:01:28 -0400
Subject: [BART-devel] CIA
Em pointed out in the CIA writeup we're iterating on that CIA optical
depth scales with the square (usually) of density, rather than linearly,
since they're a collision process and the number of collisions is
proportional to the nth power of density, where n is the number of
participants in a collision.
Is this accounted for in transit? If so, using the same mechanism for
calculating the CIA opacity and the methane opacity might not work.
--jh--
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