Why Gravitons?

[losfomot]

No they haven't. This is what advanced experiments such as LIGO[/url'] are trying to do.

 

So, LIGO has been operational for a few years now, and they haven't picked up a single gravitational wave? So it just sits there, running, until some huge event occurs close enough that LIGO might detect it?

 

Can't they make the arms longer, and thereby, more sensitive, so that it might pick up something from a nearby binary?

 

And shouldn't the facility have 3 arms to cover the 3 dimensions of space?

 

And (one more, sorry) shouldn't we be able to pick up gravitational waves from the moon? It's an accelerating mass, isn't it?

 

Probably should've started a new thread for this

[ydoaPs]

with gravitons, shouldn't there be an interference pattern? would that add more flux in the field than the uncertainty in energy?

[geistkiesel]

Gravitons: For gravitons to always attract (gravity never repels)[/i'], work over any distance and come in unlimited numbers they must be an even-spin (spin 2 in this case) boson with a rest mass of zero.

5614, Have you heard of the inflationary model of the BB? In the beginning gravity had to "push" to get the many orders of magnitude doubling in size in some 10^-34 seconds or so. Yes, soem claim that gravity uswd tro push, but that was in the olden days.

Geistkiesel

[geistkiesel]

No they haven't. This is what advanced experiments such as LIGO[/url'] are trying to do.

OOps, I need to apply a transfom to the "Now" word to make it (T)Now -> No.

 

Thanks Severian.

 

Any thouights on the Conservation of Angular Momentum as a repalcement for current gravity models?. We still start with 'noareobserved force' but the flavor of the possibilities we have to sctrutinize iis certainly full of interesting observable situations.

 

The general helical form of the solar system being "dragged" through space by the central body, the sun open up possibilities. I have seen papers claiming the sun is moving at 208 km/sec in the general direction of the north-south earth axis (to the south) . The earth-sun orbit velociy of 30 km/sec means th earth has moved 943, 477,796 km (or 946,755, 920 using 30 x 24x 3600x 365.26 seconds) in a year 6,564,160,512 km . The ratios of the distances are .14 earth orbit km/year wrt the sun distance traveled. The earth sun radius of 1.5 x 10^8 meters means the sun distance travled per year confines the earh helix to a very small tube, The combined velocity vectors of the earth: rotation, sun orbit and sun trajectory points the earth velocity vector confined to a narrow 1,3 degrees rotating 360 degress per year.

 

 

 

Geistkiesel

[CPL.Luke]

actually GR predicts that any region of space with negative pressure would possess gravity that pushes rather than pulls. (that is the inflationary model of the big bang)