Gravity and information..

[Guest Pizer]

Just a quick question, something i've been wondering about...

 

Do gravity waves carry information? And if so, what information? Is it mass\size\density\distrance from observer\?

 

Also, how does this apply to the event horizons of black holes? Essentially don't you still receive gravity waves of objects beyond the event horizon, before they reach the singularity?

 

I'm probably an idiot and just rambling of things i have no grasp on though

[BlackHole]

This is much more advanced than CM but basically, just as oscillating electric charges give out electromagnetic waves, general relativity (if it's a correct theory of nature) predicts that oscillating gravitational masses, such as double stars (also called binary stars), should give out gravitational waves.

 

The discovery that the cosmos is accelerating (based on supernova Ia observations) has made things much more complicated.

 

According to superstring theory (a favorite candidate for QG) gravitons -- hypothetical elementary particles transmitting gravitational forces -- can escape to other dimensions. This would cause leaks in gravity over large cosmic distances, what could also account for cosmic acceleration. Gravitons (as photons) have no mass and no charge. Superstring theory is the greatest challenge to dark energy.

 

See also Physical review D and arXiv for much more technical information.

 

* Also recent examinations reveal that the 'event horizon' is not as sharply defined as ones thought to be. Computer simulations indicate that information CAN get out of black holes. Also superstring theory can solve the singularity problem in the center.