[yt-users] Computing fields derived from projected quantities

Christopher Moody cemoody at ucsc.edu
Mon Nov 15 10:51:41 PST 2010


Howdy folks,
   I'd like to calculate the 'lambda' field parameter: <r|v|> / ( r
sqrt(v^2+sigma^2) )  (Emsellem et. al. http://arxiv.org/abs/astro-ph/0703531).
All of the quantities in question are viewed in projection - as an observer
would see. As a result, my lambda field depends on the 'camera location' and
requires the projected velocity and dispersion fields, as well as the
projected radius, to be computed.

  Is this possible, or rather, how much elbow grease do I have to put in to
calculate this stuff?

Thanks,
chris
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