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Originally Posted by Ken G
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Interesting paper, and a brief one, finally.
It appears they argue for a mfp of 0.9 mm average, which is considerably less than the references that used averages ranging from 5 to 10 mm. As a result, these older values yield erroneous random walk times from 3,000 to 30,000 years.
Their result, as you said, is 170,000 years, which is the time from the center of the core to the top of the radiative zone. The short time through the convective zone is considered negligible.
I'm curious if it might be possible to measure the diffusion rate someday when separate regions of varibable star disks are observable. If the He
- zone location is known, then there should be a time dealy in the light pulse due to the CLV. Since we could see deeper into the central region of the disk, the light pulse would appear slightly sooner. [Just some loose thinking.] [Added: and some very loose sentence structure.
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