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You are correct brian. While we have no evidence that gravitons exist, both General relativity, and particle physics indicate that they do not travel faster than light, In fact, because they are a massless particle they must travel at the speed of light, the same as photons. This means that they cannot travel faster than light, nor slower than light, but at exactly the speed of light.

Your last question is indeed interesting, and one that should hopefully be answered if and when we ever get a working theory of quantum gravity. As best I understand, gravitons are the quantised vibration of gravitational fields, hence they are coupled to objects that have mass (just like photons are coupled to particles with electric charge), and so interactions between particles with mass would be through the exchange of gravitons. Therefore, gravitons may have a degree of coupling with mass giving fields.

Jonny

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Subject Views Written By Posted
gravity waves "detected" 1561 laughin 11-Feb-16 16:34
Re: gravity waves "detected" 570 Susan Doris 11-Feb-16 17:44
Re: gravity waves "detected" 459 Sirius7237 11-Feb-16 18:30
Re: gravity waves "detected" 561 laughin 11-Feb-16 21:20
Re: gravity waves "detected" 479 JonnyMcA 12-Feb-16 14:23
Re: gravity waves "detected" 519 laughin 12-Feb-16 15:51
Re: gravity waves "detected" 360 JonnyMcA 12-Feb-16 16:31
Re: gravity waves "detected" 466 laughin 13-Feb-16 18:26
Re: gravity waves "detected" 516 JonnyMcA 13-Feb-16 18:41
Re: gravity waves "detected" 582 Me 15-Feb-16 15:57
Re: gravity waves "detected" 434 laughin 15-Feb-16 20:17
Re: gravity waves "detected" 470 carolb 13-Feb-16 21:53
Re: gravity waves "detected" 368 D-Archer 14-Feb-16 11:16
Re: gravity waves "detected" 383 carolb 14-Feb-16 14:54
Re: gravity waves "detected" 381 Sirius7237 14-Feb-16 20:08
Re: gravity waves "detected" 482 carolb 14-Feb-16 22:31
Re: gravity waves "detected" 494 Aine 15-Feb-16 16:20
Re: gravity waves "detected" 419 D-Archer 15-Feb-16 09:59
Re: gravity waves "detected" 394 JonnyMcA 12-Feb-16 14:31
Re: gravity waves "detected" 435 carolb 13-Feb-16 21:29
Re: gravity waves "detected" 347 laughin 14-Feb-16 15:19
Re: gravity waves "detected" 288 skakos 15-Feb-16 14:07
Re: gravity waves "detected" 380 Pete Vanderzwet 11-Feb-16 21:06
Re: gravity waves "detected" 502 JonnyMcA 12-Feb-16 14:38
Onto Dark Energy waves! 441 Eddie Larry 11-Feb-16 21:34
It took 100 years to discover what Einstein already knew 296 David L 12-Feb-16 12:50
Re: It took 100 years to discover what Einstein already knew 386 Spiros 12-Feb-16 17:09
Re: It took 100 years to discover what Einstein already knew 450 D-Archer 15-Feb-16 12:47
Re: It took 100 years to discover what Einstein already knew 461 Aine 15-Feb-16 16:15
Re: It took 100 years to discover what Einstein already knew 411 D-Archer 15-Feb-16 18:53
Re: It took 100 years to discover what Einstein already knew 433 laughin 15-Feb-16 20:39
Re: It took 100 years to discover what Einstein already knew 371 Aine 16-Feb-16 01:48
Re: gravity waves "detected" 499 dong 12-Feb-16 18:36
Re: gravity waves "detected" 493 laughin 13-Feb-16 03:26
Re: gravity waves "detected" 414 dong 16-Feb-16 07:41
Liego 409 laughin 15-Feb-16 04:17
Gravity Waves of Propaganda the Sequel 403 D-Archer 15-Feb-16 09:48
Re: gravity waves "detected" 485 skakos 15-Feb-16 12:58
Re: gravity waves "detected" 449 Aine 15-Feb-16 22:31
Re: gravity waves "detected" 320 carolb 16-Feb-16 00:57
Re: gravity waves "detected" 397 D-Archer 16-Feb-16 11:47
Re: gravity waves "detected" 536 carolb 16-Feb-16 12:32
Re: gravity waves "detected" 352 D-Archer 16-Feb-16 14:13
Re: gravity waves "detected" 367 carolb 16-Feb-16 14:42
Re: gravity waves "detected" 339 D-Archer 16-Feb-16 15:17
Re: gravity waves "detected" 469 carolb 16-Feb-16 16:27
Re: gravity waves "detected" 478 D-Archer 17-Feb-16 14:08
Really? 367 Sirfiroth 17-Feb-16 15:11
Re: Really? 475 JonnyMcA 17-Feb-16 15:32
Re: Really? 465 D-Archer 17-Feb-16 15:42
Re: gravity waves "detected" 466 carolb 17-Feb-16 18:05
mods! 420 D-Archer 18-Feb-16 11:13
Re: mods! 503 carolb 18-Feb-16 14:14
Re: mods! 500 D-Archer 18-Feb-16 16:02
Re: gravity waves "detected" 581 Sirfiroth 17-Feb-16 01:06
Re: gravity waves "detected" 401 Aine 17-Feb-16 14:48
Re: gravity waves "detected" 443 JonnyMcA 17-Feb-16 15:19
Re: gravity waves "detected" 333 Sirfiroth 17-Feb-16 15:39
Re: gravity waves "detected" 409 JonnyMcA 17-Feb-16 17:37
Re: gravity waves "detected" 495 Aine 17-Feb-16 18:49
Re: gravity waves "detected" 441 laughin 16-Feb-16 20:24
Re: gravity waves "detected" 289 D-Archer 17-Feb-16 16:23
Gravy Waves 605 D-Archer 20-Feb-16 11:39
Playing devil’s advocate on the discovery of gravitational waves 550 laughin 02-Mar-16 18:23
Scientists: we're 100% convinced 374 laughin 07-Mar-16 17:13
Black holes and big bangs can't co-exist 474 laughin 13-Mar-16 04:52
Re: gravity waves "detected" 411 brett z 20-Apr-16 23:42
Re: gravity waves "detected" 419 laughin 21-Apr-16 14:02
Re: gravity waves "detected" 337 OCaptain 10-May-16 12:45
Re: gravity waves "detected" 318 laughin 10-May-16 13:16
Re: gravity waves "detected" 355 OCaptain 10-May-16 13:21
Re: gravity waves "detected" 401 laughin 10-May-16 19:25
Re: gravity waves "detected" 512 OCaptain 10-May-16 22:56
Re: gravity waves "detected" 412 laughin 11-May-16 15:32
Re: gravity waves "detected" 512 JonnyMcA 11-May-16 16:53
Re: gravity waves "detected" 514 laughin 12-May-16 16:26
pompousness "detected" 452 laughin 18-May-16 15:25
bump- 2 weeks 552 laughin 27-May-16 15:02
Re: bump- 3 weeks 492 laughin 02-Jun-16 23:20
Re: bump- 4 weeks and why isn't Carolb patrolling the threads 483 laughin 10-Jun-16 15:42
Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 465 laughin 04-May-16 13:15
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 473 D-Archer 09-May-16 19:05
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 290 OCaptain 10-May-16 12:46
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 503 laughin 10-May-16 13:27
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 342 OCaptain 10-May-16 16:39
Re: Gravitational Waves from Black Hole Megamergers Are Weaker Than Predicted 397 laughin 10-May-16 19:10
how many times can you change the rules and still get a black hole 390 laughin 08-Jun-16 14:00
LIGO press conf, June 15 431 brett z 15-Jun-16 11:53
Re: LIGO press conf, June 15 415 D-Archer 15-Jun-16 14:48


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