5 minute LIGO discovery overview [The 1 hour You Tube NSF announcement]

https://www.black-holes.org/gw150914 seems to be best single site with
the best collection of some short videos

[suggestive black hole collision
animation: g-lens image; warped spacetime animation; undulating grid animation,
etc]

[explore this website by going
to the Home button and entering!]

https://gravitational_waves.ihes.fr/

French group of effective one
body (EOB) approach (like reduced mass in binary problem: reduced spacetime)
couple with post-Newtonian perturbation expansion (some friends of bob are
pictured here); there is a complicated interaction between analytical
approximation techniques, numerical relativity, and general theory.

When a GW wave passes, the effects on a ring of nearby particles follow these
patterns for linear and circular polarizations.

lecture given 1 year ago: colliding black holes, G-electric and G-magnetic field lines
generating GW waves 18 in, 26 min

The GR gravitational field potentials are the coefficients of the spacetime
metric, and the curvature fields analogous to the tidal Newtonian field which is
the gradient of the Newtonian gravitational force field also come in electric
and magnetic parts like the electromagnetic field, but here they are instead
symmetric tracefree 3x3 matrix fields. These have 3 real eigenvector
directions, so one can visualize these by their field lines, which are mutually
orthogonal (any symmetric matrix has orthogonal eigenvectors!), so there are 3
sets of mutually orthogonal electric like (tidal) field lines, and 3 sets of
magnetic like (frame dragging) field lines that help us visualize the
gravitational field in GR. Thorne explains all this with nice slides. Thorne is
the consultant behind the visuals of the black hole in the recent movie
Interstellar [google].

--- bob

my webpage

http://www.nasa.gov/vision/universe/starsgalaxies/gwave.html [2006 announcement about black hole simulation advances]

https://www.youtube.com/watch?v=xVgPplOgB1g suggestive black hole collision animation 2006

https://www.sciencenews.org/article/gravitational-waves-explained