Mar
1
Gravitational Flexion, from Jeff Sasmor
March 1, 2011 |
Googling "Flexion" I came across some physiology references and also one astrophysical that seemed apropos:
Gravitational Flexion (pronounced "flecks-shun" for the uninitiated, and yes, it is a real word) is a new technique for measuring 2nd order gravitational lensing signals in background galaxies and radio lobes.
Unlike shear, flexion directly probes variations of the potential field.
Moreover, the information contained in flexion is orthogonal to what is found in the shear. Thus, we get the information "for free."
(some graphics at the site).
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