Searching for gravitational waves
August 9, 2011 By Tammy Plotner
Two-dimensional representation of gravitational waves generated by two neutron stars surrounding each other. Credit: NASA
Colliding neutron stars and black holes, supernova events, rotating neutron stars and other cataclysmic cosmic events Einstein predicted they would all have something in common oscillations in the fabric of space-time. This summer European scientists have joined forces to prove Einstein was right and capture evidence of the existence of gravitational waves.
Europes two ground-based gravitational wave detectors GEO600 (a German/UK collaboration) and Virgo (a collaboration between Italy, France, the Netherlands, Poland and Hungary) are underway with a joint observation program which will continue over the summer, ending in September 2011. The detectors consist of a pair of joined arms placed in a horizontal L-shaped configuration. Laser beams are then passed down the arms. Suspended under vacuum at the ends of the arms is a mirror which returns the beam to a central photodetector. The detectors work by measuring tiny changes (less than the diameter of a proton), caused by a passing gravitational wave, in the lengths (hundreds or thousands of meters). The periodic stretching and shrinking of the arms is then recorded as interference patterns.
Much like our human ears are able to distinguish the direction of sound from being spaced apart, so having interferometers placed at different locations benefits the chances of picking up a gravitational wave signal. By placing receivers at a distance, this also helps to eliminate the chances of picking up a mimicking terrestrial signal, since it would be unlikely for it to have the same characteristics at two locations while a genuine signal would remain the same.
If you compare GEO600 and Virgo, you can see that both detectors have similar sensitivities at high frequencies, at around 600Hz and above, says Dr Hartmut Grote, a scientist at the Max Planck Institute for Gravitational Physics (Albert Einstein Institute/AEI) and the Leibniz University in Hannover, Germany. That makes it very interesting for us to search this band for possible gravitational waves associated with supernovae or gamma-ray bursts that are observed with conventional telescopes.
Of all phenomena, gamma-ray bursts are expected to be one of the strongest sources of gravitational waves. As the most luminous transient event in the known Universe, this collapse of a supermassive star core into a neutron star or black hole may be the most perfect starting point for the search. As of now, the frequencies will depend on the mass and may extend up to the kHz band. But dont get too excited, because the nature of gravitational wave signals is weak and chances of picking up on it is low. However, thanks to Virgos excellent sensitivity at low frequencies (below 100 Hz), it is a prime candidate for gathering signals from isolated pulsars where the gravitational wave signal frequency should be at around 22Hz.
And well be listening for the results
Source: Universe Today
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Aug 09, 2011
Rank: 1.4 / 5 (18)
Aug 09, 2011
Rank: 4.6 / 5 (21)
I suppose skeptical is good, Oliver is skeptical, the Aether folks are skeptical, the Electric Universe people are skeptical. It would really help your case if you could show where Einstein is wrong.
Somewhere.
Anywhere.
Alas, that is not the case.
Aug 09, 2011
Rank: 4.6 / 5 (18)
What is space? It's what you measure with a yardstick. It comes in three flavors, essentially "up-down", "front-back", and "sideways".
What is time? It's what you measure with a clock. It comes in one flavor, essentially "ticks".
What is space-time? It's time and space considered together because, as Einstein showed, they're not independent.
Aug 09, 2011
Rank: 4.8 / 5 (39)
The predictions of GR are inarguable, therefore your skepticism is irrational.
Space-time should not be interpreted as a physical substance in and of itself. It is the arena of possible events. It has a structure which limits what can and can't happen.
Aug 09, 2011
Rank: 1.2 / 5 (24)
The rest of our beautiful dynamic universe, including our very lives, are sustained by dynamic competition between neutron repulsion [1] and gravitational attraction [2] !
1. "Neutron Repulsion", The APEIRON Journal, in press, 19 pages (2011):
http://arxiv.org/...2.1499v1
2. "Is the Universe Expanding?", The Journal of Cosmology 13, 4187-4190 (2011):
http://journalofc...102.html
With kind regards,
Oliver K. Manuel
Aug 09, 2011
Rank: 1.8 / 5 (16)
http://www.physor...752.html
Aug 09, 2011
Rank: 4 / 5 (4)
Aug 09, 2011
Rank: 2.2 / 5 (16)
See my comment herein.
http://www.physor...sar.html
And of course, early structures becoming harder to explain.
http://www.physor...ter.html
http://www.physor...rse.html
Just getting harder to support this old theory. We need to look for alternatives, rather than patches.
Aug 09, 2011
Rank: 4.2 / 5 (5)
That latter deserves a bit of explanation. The matter we are familiar is made up of charged particles. (Even neutrons--they consist of three charged quarks.) String theory postulates that the universe has more than four dimensions, but that we live (and all EM stuff stays) in a "brane" of reduced dimensions.
The higher dimensions could be "rolled up", not expanded since the big bang. Or they could have a large extent, but be mostly empty since normal matter is restricted to one or more branes.
If gravity waves can travel outside our brane, they would fall off faster than the expected inverse square law. (Inverse cube or worse.) But this would also mean that most "dark" matter could be located in one or more other branes, and we can only see it through its gravitational effects.
Aug 09, 2011
Rank: 3 / 5 (2)
Aug 10, 2011
Rank: 1 / 5 (2)
Aug 10, 2011
Rank: 3.7 / 5 (9)
Maybe. But the Universe IS expanding and thus it must have been smaller in the past. Project back and you get the Big Bang or at least some kind of beginning to the expansion. With Brane theory there doesn't have to be a BB. There may be other explanations for the start of the expansion. BUT there must have been a start of some kind since the expansion is real.
Ethelred
Aug 10, 2011
Rank: not rated yet
Thanx.
Aug 10, 2011
Rank: 3 / 5 (2)
Aug 10, 2011
Rank: 5 / 5 (3)
Or could it be that the detection technology simply does not exist?
Aug 10, 2011
Rank: 4 / 5 (6)
Could be BUT none of the experiments are expected to find a gravity wave unless a major event should happen very near. The present experiments are mostly to learn how to make them work.
The next set of experiments, should they be funded, have a small chance of detecting something every now and then if the theory is correct.
And I think that covers Telekinetics post that showed up AFTER I refreshed and before I edited this post.
Ethelred
Aug 10, 2011
Rank: 1.8 / 5 (11)
Aug 10, 2011
Rank: 5 / 5 (1)
A study published May 27, 2011 in IOP Publishing's journal Classical and Quantum Gravity, Professor Bernard Schutz, of the Albert Einstein Institute, Germany, demonstrated that an additional detector would more than double the detection rate of gravitational waves and could double the amount of sky being covered.
It was estimated last year that by 2016 the existing network of four detectors would be able to detect, on average, 40 neutron-star merger events per year by monitoring the gravitational waves they produce. Using a computer analysis, this study showed that by performing optimal coherent data analysis, the network could theoretically detect 160 events per year.
Aug 10, 2011
Rank: 4.3 / 5 (6)
And yes it seems tricky to me.
No. You stop when you fail to meet your theorectical expectation with a reasonable degree of certainty.
Not that close. And I was remembering it as needing to be much closer than the actual expectations over the time available.
http://en.wikiped...>>
Aug 10, 2011
Rank: 4 / 5 (4)
What I wrote was heavily based on what WASN'T being said and what WAS said about future detectors. They never say they actually expect an unambiguous detection. Yet. With the present equipment.>>
Aug 10, 2011
Rank: 4 / 5 (4)
Which is why I said they were learning how to make it work.
Ethelred
Aug 10, 2011
Rank: 5 / 5 (1)
It is apples and oranges. The LHC is speeding particles to smash them for precise detections of the collision while the gravity wave detector is precisely measuring the distortions in laser emissions because of outside influences.
Aug 10, 2011
Rank: 1.5 / 5 (16)
Why?
Who cares if there are gravitational waves?
Is that more important than understanding gravity's role in the universe?
Whether or not there are gravitational waves, the opposing forces of gravitational attraction and neutron repulsion seem to sustain our dynamic universe, including our very lives.
Aug 10, 2011
Rank: 3.9 / 5 (7)
Far more people than care about your bogus ideas,
Ollie M -- there could hardly be less ... but does that bother you? Not in the slightest.
Aug 10, 2011
Rank: 4 / 5 (4)
Aug 10, 2011
Rank: 1.5 / 5 (15)
That is reality. That is "what is."
Gravitational waves?
Who knows?
Who cares?
Competition between gravitational attraction and neutron repulsion maintains our dynamic universe and our very lives.
Neutron repulsion is recorded in nuclear rest masses of every nucleus with two or more neutrons [1]. Let's address experimental data instead of speculating about the number of angels on the head of a pin or gravitational waves between Body A and Body B.
1. "Neutron Repulsion", The APEIRON Journal, in press, 19 pages (2011):
http://arxiv.org/...2.1499v1
Aug 10, 2011
Rank: 5 / 5 (6)
Except that better understanding how things work is how we are able to manipulate/simulate them for ourselves. It's the basis of all technology.
You think you'd even have a clue what a neutron was if people didn't keep trying to figure out what things are made of and keep going smaller and smaller?
Aug 10, 2011
Rank: 1.5 / 5 (11)
I would not have a clue about the neutron and the role it plays in astrophysics and cosmology without the earlier work of Albert Einstein, Francis William Aston, James Chadwick, Paul Kazuo Kuroda, John H. Reynolds, etc., etc.
All of my conclusions, however, came from experimental observations made in my lab and in hundreds of others worldwide.
Aug 10, 2011
Rank: 1.7 / 5 (6)
As Eddington pointed out already before many years, gravitational waves do not have a unique speed of propagation. The speed of the alleged waves is coordinate dependent. A different set of coordinates yields a different speed of propagation and such waves would propagate like noise.
The same result can be imagined easily with water surface model, where transverse waves are serving like analogy of waves of light and the gravitational waves are behaving like longitudinal sound waves, which are spreading through underwater. Because sound waves are spreading a way faster, then the surface waves, they would manifest like indeterministic noise at the water surface.
Aug 10, 2011
Rank: 1.7 / 5 (6)
Am I optimistic too much by now?
Aug 10, 2011
Rank: 1 / 5 (1)
Aug 10, 2011
Rank: 4.4 / 5 (7)
That is what the experiments are for. If we knew we wouldn't need them.
Lots of rational people. Many, unlike you, that understand GR.
No. What your Magic Table shows it the Pauli Exclusion Principle and there is no actual evidence for neutron repulsion. Do let us know when you are going show evidence for something other than the PEP.
I did. Its the PEP. Quit pretending this has not been pointed out many times. Deal with it.
Ethelred
Aug 10, 2011
Rank: 4.3 / 5 (6)
Anytime you want to be taken seriously you will need to stop using sockpuppets.
Ethelred
Aug 10, 2011
Rank: 1 / 5 (8)
What "Magic Table"?
Write up your supposed disproof of neutron repulsion and publish it.
Aug 10, 2011
Rank: 4.2 / 5 (5)
I have published my disproofs. Right here. You refuse to deal with them. Neither here nor anyone's anywhere else.
However I don't need to disprove it.
YOU need to prove it. By giving evidence that can distinguish it from the PEP. It is your theory. It is on YOU to support it.
Ethelred
Aug 10, 2011
Rank: 1 / 5 (8)
No, Ethnelred.
Credible research publications are published in peer-reviewed journals.
Aug 10, 2011
Rank: 3.8 / 5 (8)
Is that why your latest paper is published without a peer review in a journal that is popular with cranks. Like you.
This is just another of your obvious attempts to avoid dealing the utter failure of your theories. Excuse me, theory, singular. All the rest is based on one concept. There was a supernova at the beginning of our Solar System, no problem there, and it was OUR Sun that was the supernova. The rest exists to support that clearly silly idea.
Since it is so silly:
You attack scientists as greedy liars.
You spam one site after another with claims of support that always turn out to YOU or YOURS.>>
Aug 10, 2011
Rank: 3.8 / 5 (8)
Instead of answering reasonable questions you repost the stuff that is in question OR you attack the sincerity and competence of the questioner. Which is why people attack you as a person. You started that shit and done so on many sites. Talk about throwing stones in a glass house.
Again
What EVIDENCE separates neutron repulsion from the Pauli Exclusion Principle?
What evidence, real evidence not wild assed speculation based on your theory, is there for the Sun having a neutron star within it and and iron mantle so near the surface you claim we can see it in Sun Spots? Keep in mind that the Sun Spots do NOT have large amounts of iron. Indeed they have the traces expected by standard theory.>>
Aug 10, 2011
Rank: 4 / 5 (10)
You post here. That makes you liable to reasonable questions. HERE. If you stuck to competent journals you would not be here to question. Go away or start answering OR you will just have to live with me and others pointing out just how bad your science is.
If you want to me to stop mentioning your conviction you will have to stop attacking people. However I have no control over others despite the fairy stories you try to pass off as reality.
With no expectations of actual answers,
Ethelred Hardrede
Aug 10, 2011
Rank: 1 / 5 (2)
- http://www.astron...r-for-wa
I find it hard to accept building a detector network so as to determine the source direction of these hypothetical waves before even one has been detected.
They actually did/do expect unambiguous detection's. However it has not happened (yet) and money is already being requested to provide further data (source direction) prior to even confirming the waves existence.
Aug 10, 2011
Rank: 2 / 5 (8)
Ignore him. The verbal battle pollutes the comments even more so than his obsessive delusional notions. Just smile and wave. He is not worth the effort.
Aug 10, 2011
Rank: 4.2 / 5 (5)
I understand the ones you gave me, though I do disagree. I REALLY don't understand the FIVES you gave Kio.
Ethelred
Aug 10, 2011
Rank: 5 / 5 (2)
Aug 10, 2011
Rank: 2 / 5 (8)
However, the justification for a third detector (in Australia) is that "source direction" needs to be established. My objection is that it is premature to do so until a true positive detection is made in any detector. After all a couple of hundred million bucks goes a long way for health care (i know besides the point).
As for the ratings ... mistakes happen. Sometimes you are (for me) dismissive of others too quickly (said without any intended offence and i can be less reasonable than you at times!) and (although I don't recollect ranking Kio at all), I was probably laughing so hard (rather than getting angry) I could not see the screen properly through the tears. I'll be more careful if you value your ranking (I don't care about mine, being much more interested in the actual comments).
@jsdarkdestruction
Agreed. Incredible patience but in my view if we all engage Oliver then he wins by dominating the comment content.
Aug 10, 2011
Rank: 1.6 / 5 (7)
And I don't expect to be taken seriously at all in this moment. The search for gravitational waves is a big business, which feeds many people & private companies and where huge money are involved.
http://physicswor...ws/46027
These people will not stop with their activities, until some money are going. This is simply, how the contemporary science is working: every pretense for employment is good enough here. From the same - just the opposite - reason the cold fusion is ignored - now it's simply considered a too risky business from perspective of grant applications.
http://www.wired...._pr.html
You can believe me, nothing deeper is about it - just the fear of (lost of) money.
Aug 11, 2011
Rank: 5 / 5 (3)
Aug 11, 2011
Rank: 1 / 5 (2)
In addition, Dr. Manuels pisses me as a rather primitive e-mail spammer: from some unknown reason I've e-mail box full of his theories & meeting proposals, although I never claimed their support.
Aug 11, 2011
Rank: 4 / 5 (4)
Its not that important but it does have some value as long as the ranking system exists. Mostly with people that I don't see much. It is a tool for keeping track of the way people behave.
Ethelred
Aug 11, 2011
Rank: 1.7 / 5 (6)
oh but it is some of your money. You get to pay half the cost! 140 million dollars each.
Aug 11, 2011
Rank: 4 / 5 (4)
You were still posting under multiple names, rawa1 and Callippo in the same discussion, a few weeks ago. That is not a long time.
No. I don't believe you. You may be right about there being nothing to detect, though not on the money, but it will be an accident as you can no more do the math for GR than I.
How did he get your e-mail address?
Ethelred
Aug 11, 2011
Rank: 1 / 5 (2)
Kind of leaning toward Callippo and his comment on money and big business - only because it makes no sense to me to build a detector using the pretense of "source direction" before any detection has occurred.
Aug 11, 2011
Rank: 1 / 5 (3)
If simple logic doesn't fit, any advanced math can save the formal models. If the only formal math would count as an evidence, the Sherlock Holmes couldn't work without a calculator in his hand. For example, Galileo was able to refuse the geocentric model in such way: without math but with using of few indicias (you know, the order of Venus phases, Lunar crates shadows, etc.).
The paradigm of contemporary physics based on formal math helps physicists and mathematicians in their employment, because many theories could be possible to refuse already. But because their math is complex, it's not so easy to reveal it.
Aug 11, 2011
Rank: 1 / 5 (3)
After all, on the similar conceptual mistake the Higgs boson concept is based - we cannot observe the fluctuations of vacuum with vacuum fluctuations. If the relativistic equations would include all terms in consequential way, they would lead into insolvable fuzzy solution. Both concepts are artefacts of simplification of formal models for the sake of their resolvability in formal way. The math not only can have all answers, but its answers may be misleading at times.
Aug 11, 2011
Rank: 4.2 / 5 (5)
Really Zephyr.
You can't do diddly with Gravity waves without significant math. Any claim to the contrary is as true as when you claimed you gave up sockpuppets.
Let me know when you really stop. You are as bad as a cocaine addict. Always its just one last time. Till the next time.
I don't think the Betty Ford clinic deals with sockpuppet addiction but perhaps you could ask.
Ethelred
Aug 11, 2011
Rank: 5 / 5 (4)
"You're fighting with ghosts, as I'm not using sockpuppets at all: all my previous accounts are inactive already for long time."
"Maybe this week. And you have cut back before.
You were still posting under multiple names, rawa1 and Callippo in the same discussion, a few weeks ago. That is not a long time."
That is REALLY not a long time Callippo/rawa1/Zephyr......
Aug 11, 2011
Rank: 1 / 5 (5)
http://www.jstor..../2371768
Aug 11, 2011
Rank: 4 / 5 (4)
How does it have any meaning in regards to the real world?
For instance what experiment shows that it is more correct than GR?
None.
Ethelred
Aug 11, 2011
Rank: 1 / 5 (4)
Aug 12, 2011
Rank: 5 / 5 (1)
Aug 12, 2011
Rank: 4.2 / 5 (5)
I have exactly zero interest in debating with your multiple sockpuppets.
Piss off.
No you don't deserve respect. So again piss the hell off.
jsdarkdestruction
That was not a slip. He knows perfectly well he was lying about not using using sockpuppets and is deliberately switching. He has told that same lie before. He seems to think its funny. Its about his level of humor anyway, troll under the bridge level. Otherwise he seems short on humor.
Of course I could be wrong. He might really be that incompetent. He sure is incompetent with that claim about gravity waves. It was purest hope that the any equipment yet finished would ever find one.
Allegedly the next round should. Frequently. If not then there is a problem with the theory. But not yet.
Ethelred
Aug 13, 2011
Rank: not rated yet
Aug 13, 2011
Rank: 1 / 5 (2)
http://imagine.gs...LISA.jpg
Aug 14, 2011
Rank: 3.7 / 5 (3)
So yes they did exactly what you said they didn't. And the jpg agrees with me. Which is par for the course with you. Images that don't agree with your claims, as in this case or are crap you made yourself.
Piss off sockpupet.
Excuse me. I failed to the use the full and proper appellation.
Sockpuppet of a lying troll.
Ethelred
Aug 14, 2011
Rank: 1 / 5 (4)
http://physicswor...ws/32461
Everything else is just a giant waste of public money for the sake of safe life of few astronomers and theorists. IMO the ratio of these wastes per person involved is not so different from waste caused with some dictators over the world, because there is only few GW theorists and the price of these detectors is gigantic.
http://physicswor...ws/46027
You can compare the enthusiasm in search for GW with the twenty years standing ignorance of cold fusion results under the situation, we are facing global geopolitical and environmental crisis with burning of megatons of fossil fuels every day. The ignorance of physicists is harming human civilization in double manner.
Aug 14, 2011
Rank: 1 / 5 (5)
On 8 April 1967**: The editor of EPSL received a manuscript by my first PhD student and me reporting an inclusion in an iron meteorite is as old as the most primitive meteorites and contained a large excess of (radiogenic) xenon-129 from the decay of extinct iodine-129 [EPSL 2, 220- 224 (1967)]:
www.sciencedirect...6790132X
17-21 April 1967*: A group of influential scientists met at the Bilderberg Hotel and concluded Earths heat source the Sun is homogeneous and in hydrostatic equilibrium [Solar Physics 3, 5-25 (1968)]:
http://adsabs.har...oPh.3.5G
*That is the basis of false claims
a.) Our elements were made elsewhere and
b.) CO2 causes global climate change
[The Bilderberg Sun, etc (2011)]:
http://dl.dropbox...oots.pdf
** R-, p- and s-products reported in Mo isotopes of iron meteorites [Qi Lu, 1991 PhD, Tokyo U]
www.omatumr.com/D...Data.htm
Aug 14, 2011
Rank: 2.6 / 5 (5)
Aug 14, 2011
Rank: not rated yet
Aug 14, 2011
Rank: not rated yet
Aug 14, 2011
Rank: 5 / 5 (3)
Aug 16, 2011
Rank: 5 / 5 (1)
Luckily Oliver keeps on posting the same irrelevant nonsense which means that people like me who aren't physicists (I'm just an engineer) can build up a picture of his proposals and do the background research on his figures to see if the theory has potential. It didn't take too long to work out the flaws.
Weirdly, if he didn't post so much of it then those of us who are here to learn would probably more readily accept his theories.