From: Amara Graps (amara@amara.com)
Date: Fri Aug 16 2002 - 03:12:48 MDT
Anders Sandberg:
>Thanks. But what about finding the tangential component of the peculiar
>velocity?
Tangential with respect to what? To us? I had thought that your 'tangential'
was my 'peculiar' velocity, i.e. that caused by the gravitational
pull of their neighbor galaxy. I am assuming root-mean-square velocity
for the peculiar velocity, then.
Here:
http://nedwww.ipac.caltech.edu/level5/March01/Strauss/Strauss6.html
it says that 'only the radial component is what they can measure'.
This is a nice paper that should answer your question (I didn't
read further, it's a long......)
Full paper here:
http://nedwww.ipac.caltech.edu/level5/March01/Strauss/Strauss_contents.html
"The Density and Peculiar Velocity Fields of Nearby Galaxies"
Amara
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