Speculation rife that Einstein’s greatest prediction — gravitational waves — have been found.

“EINSTEIN’S greatest prediction may have been correct: The titanic forces unleashed by two colliding black holes has reportedly exposed the fabric of space-time itself through long-elusive gravitational waves.

The physics community has been abuzz with speculation ever since excited researchers affiliated with — but not directly involved in — the project spilt the beans on Twitter.

The US National Science Foundation and the Laser Interferometer Gravitational-Wave Observatory experiment (LIGO) has now announced a press conference for 10.30am ET Thursday (2.30am AEDT Friday) in Washington DC to coincide the publication of a report in the science journal Nature. The event will be broadcast live.

The international collaboration includes researchers from Australian National University, Monash University, The University of Melbourne, University of Adelaide and University of Western Australia.”

http://www.heraldsun.com.au/technology/speculation-rife-that-einsteins-greatest-prediction—gravitational-waves—have-been-found/news-story/6e4d346ea3af9785957f90490603ba9a#load-story-comments

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macx

Exciting, ta macx.

Hey macx. Long time no read.

*Waves *

…even our very own “astrologer”(!!) has hit the airwaves…

Geraint Lewis is a professor of astrophysics at the University of Sydney.

“The rumours have been building for a long time,” he said. “With good news emerging from LIGO after a recent upgrade in technology and with Friday’s press conference, everyone is expecting that they will announce they’ve detected something,” he said.

http://www.theage.com.au/technology/sci-tech/gravitational-waves-discovery-would-open-up-new-world-of-science-20160210-gmqysz.html

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Greetings Rule… (and Cusp should you be lurking!)

:)

macx

macx said:

…even our very own “astrologer”(!!) has hit the airwaves…

Geraint Lewis is a professor of astrophysics at the University of Sydney.

“The rumours have been building for a long time,” he said. “With good news emerging from LIGO after a recent upgrade in technology and with Friday’s press conference, everyone is expecting that they will announce they’ve detected something,” he said.

http://www.theage.com.au/technology/sci-tech/gravitational-waves-discovery-would-open-up-new-world-of-science-20160210-gmqysz.html

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Greetings Rule… (and Cusp should you be lurking!)

:)

macx

What are you doing here?

Boris…an interloper!

:)

Greetings Sibeen.

“What are you doing here?”

“Boris…an interloper!”

:)

Just making sure y’all are playing nicely.

macx

Here’s a recent interview with Cusp about Stephen Hawking (rather painful at times on account of the not-terribly-bright interviewer):

http://www.abc.net.au/overnights/stories/s4358346.htm

..and I see cusp has a book out

sibeen said:

..and I see cusp has a book out

!http://1.bp.blogspot.com/-8u8kYHcpgzU/VmyZ8l1qXlI/AAAAAAAADpE/xA1QzcKJ1rA/s1600/Cover0.png

Not available until the middle of the year. But being a Cambridge publication it probably won’t be cheap :)

Bubblecar said:

sibeen said:

..and I see cusp has a book out

!http://1.bp.blogspot.com/-8u8kYHcpgzU/VmyZ8l1qXlI/AAAAAAAADpE/xA1QzcKJ1rA/s1600/Cover0.png

Not available until the middle of the year. But being a Cambridge publication it probably won’t be cheap :)

Read it for nothing at Letters to Nature.

(At least the non-cusp part of it).

more on the story

Gravitational waves discovery would open up new world of science

macx said:

Speculation rife that Einstein’s greatest prediction — gravitational waves — have been found.

“EINSTEIN’S greatest prediction may have been correct: The titanic forces unleashed by two colliding black holes has reportedly exposed the fabric of space-time itself through long-elusive gravitational waves.

The physics community has been abuzz with speculation ever since excited researchers affiliated with — but not directly involved in — the project spilt the beans on Twitter.

The US National Science Foundation and the Laser Interferometer Gravitational-Wave Observatory experiment (LIGO) has now announced a press conference for 10.30am ET Thursday (2.30am AEDT Friday) in Washington DC to coincide the publication of a report in the science journal Nature. The event will be broadcast live.

The international collaboration includes researchers from Australian National University, Monash University, The University of Melbourne, University of Adelaide and University of Western Australia.”

http://www.heraldsun.com.au/technology/speculation-rife-that-einsteins-greatest-prediction—gravitational-waves—have-been-found/news-story/6e4d346ea3af9785957f90490603ba9a#load-story-comments

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macx

Nice, where’s the best place to catch that press conference?

mollwollfumble said:

macx said:

Speculation rife that Einstein’s greatest prediction — gravitational waves — have been found.

“EINSTEIN’S greatest prediction may have been correct: The titanic forces unleashed by two colliding black holes has reportedly exposed the fabric of space-time itself through long-elusive gravitational waves.

The physics community has been abuzz with speculation ever since excited researchers affiliated with — but not directly involved in — the project spilt the beans on Twitter.

The US National Science Foundation and the Laser Interferometer Gravitational-Wave Observatory experiment (LIGO) has now announced a press conference for 10.30am ET Thursday (2.30am AEDT Friday) in Washington DC to coincide the publication of a report in the science journal Nature. The event will be broadcast live.

The international collaboration includes researchers from Australian National University, Monash University, The University of Melbourne, University of Adelaide and University of Western Australia.”

http://www.heraldsun.com.au/technology/speculation-rife-that-einsteins-greatest-prediction—gravitational-waves—have-been-found/news-story/6e4d346ea3af9785957f90490603ba9a#load-story-comments

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macx

Nice, where’s the best place to catch that press conference?

ligo media advisory

CrazyNeutrino said:

mollwollfumble said:

macx said:

Speculation rife that Einstein’s greatest prediction — gravitational waves — have been found.

“EINSTEIN’S greatest prediction may have been correct: The titanic forces unleashed by two colliding black holes has reportedly exposed the fabric of space-time itself through long-elusive gravitational waves.

The physics community has been abuzz with speculation ever since excited researchers affiliated with — but not directly involved in — the project spilt the beans on Twitter.

The US National Science Foundation and the Laser Interferometer Gravitational-Wave Observatory experiment (LIGO) has now announced a press conference for 10.30am ET Thursday (2.30am AEDT Friday) in Washington DC to coincide the publication of a report in the science journal Nature. The event will be broadcast live.

The international collaboration includes researchers from Australian National University, Monash University, The University of Melbourne, University of Adelaide and University of Western Australia.”

http://www.heraldsun.com.au/technology/speculation-rife-that-einsteins-greatest-prediction—gravitational-waves—have-been-found/news-story/6e4d346ea3af9785957f90490603ba9a#load-story-comments

<><><><><>

macx

Nice, where’s the best place to catch that press conference?

ligo media advisory

“LIVE WEBCAST:
For press not based in the Washington, D.C. area, this event will be simulcast live online, and we will try to answer some questions submitted remotely. For details about how to participate remotely, please contact anyone listed below.

MEDIA CONTACTS:”

And then you have to call or email someone…

I wondered about that

maybe they will put up a link when it happens

CrazyNeutrino said:

I wondered about that

maybe they will put up a link when it happens

The BBC did a radio doco on this several months ago.
It wasn’t a Wow journalist doco, they went to the site, they interviewd the righ people, they asked knowledgeable questions.
I came away thinking that this experiment could confirm gravity waves but it wont disprove them.

Big Albert does it again.

Cop that!

They turned it on at the wall last September and immediatly got a hit but nothing since apparently.
I try turning it off and on at the wall again.

It’s been confirmed.

Gravitational waves observed for the first time, proving Albert Einstein right 100 years on

http://www.smh.com.au/technology/sci-tech/albert-einstein-was-right—100-years-on-20160211-gmr9ja.html

Good stuff! Well done!

http://www.abc.net.au/news/2016-02-12/first-direct-evidence-of-gravitational-waves-detected/7140750

I wouldn’t recognise a gravitational wave if I fell over one.

Divine Angel said:

I wouldn’t recognise a gravitational wave if I fell over one.

No need to fall over them, they go right through you.

Looks like the next LIGO will be built in India. Australia had a chance but wasn’t willing to cough up the money.

They are still grappling with dark matter though, makes up 70% of matter apparently.
Maybe this development may be useful in understanding it, or not.

Clever guy, that Albert.

Well done to the Team.

With its astonishing accuracy how did scientists filter out all the groans and tidal tremors of the earth?

https://www.advancedligo.mit.edu/overview.html

technical.

and the

“Advanced LIGO subsystems”

down the side gives details …

AwesomeO said:

With its astonishing accuracy how did scientists filter out all the groans and tidal tremors of the earth?

My understanding is that Black holes colliding produce a greater wave bigger than anything on Earth can produce

the instruments are tuned to detect that wave and to ignore Earthly vibrations

that wave is still moving through space time

From my reading the two instruments reacted at an interval that related to the speed of light indicating an event propogating at that speed. So faster and different to earthquakes and tidal tremors.

yes, though those extraneous noises have to be dampened because they are far bigger than what is being measured. the arms of the intrument, what the lasers are shot down, are distorted when a gravity wave passes through them. this affects the distance between the laser source and the mirrors at the ends of the arms. this is what is being measured. so any vibration will make the mirrors/lasers wobble and also affect the distances.

Gravitational wave detection ‘changes everything’

Gravitational Wave Detectors: How They Work

AwesomeO said:

From my reading the two instruments reacted at an interval that related to the speed of light indicating an event propogating at that speed. So faster and different to earthquakes and tidal tremors.

Non-elastic energy continuity disruption……..

Postpocelipse said:

Non-elastic energy continuity disruption……..

Show your workings please.

Boris said:

i think you forgot to carry the 1

Boris said:

What a beautiful mind.

mine

Boris said:

mine

Hahahahahahahahahahahaha! :)

Boris said:

mine

:)

Boris said:

mine

!http://us.123rf.com/450wm/soesoe/soesoe0607/soesoe060700293/478392-string-theory.jpg

mine…

mine

With 58 scientists working on the project here in Australia.

We have enough people to warrant building a gravity wave detector here .

CrazyNeutrino said:

With 58 scientists working on the project here in Australia.

We have enough people to warrant building a gravity wave detector here .

The government isn’t interested. It apparently isn’t a bear market.

Does anyone here know details?

For instance, I know they were looking for a signal technically known as a chirrup, a periodic signal where the frequency increases with time. For example this is produced when black holes spiral in together, rather than simply orbiting a la kepler. Doing this rules out the many extraneous noises that produce strictly periodic signals. Is that what they found? At what signal strength? How does the signal strength compare with detection limits of other detectors?

mollwollfumble said:

Does anyone here know details?

For instance, I know they were looking for a signal technically known as a chirrup, a periodic signal where the frequency increases with time. For example this is produced when black holes spiral in together, rather than simply orbiting a la kepler. Doing this rules out the many extraneous noises that produce strictly periodic signals. Is that what they found? At what signal strength? How does the signal strength compare with detection limits of other detectors?

Aha. The details do exist.

September 14, 2015 at 09:50:45 UTC the two detectors of the Laser Interferometer Gravitational-Wave Observatory simultaneously observed a transient gravitational-wave signal. The signal sweeps upwards in frequency from 35 to 250 Hz with a peak gravitational-wave strain of 1.0×10−21. It matches the waveform predicted by general relativity for the inspiral and merger of a pair of black holes and the ringdown of the resulting single black hole. The signal was observed with a matched-filter signal-to-noise ratio of 24 and a false alarm rate estimated to be less than 1 event per 203 000 years, equivalent to a significance greater than 5.1σ. The source lies at a luminosity distance of 410+160−180  Mpc corresponding to a redshift z=0.09+0.03−0.04. In the source frame, the initial black hole masses are 36+5−4M⊙ and 29+4−4M⊙, and the final black hole mass is 62+4−4M⊙, with 3.0+0.5−0.5M⊙c2 radiated in gravitational waves.

mollwollfumble said:

mollwollfumble said:

Does anyone here know details?

For instance, I know they were looking for a signal technically known as a chirrup, a periodic signal where the frequency increases with time. For example this is produced when black holes spiral in together, rather than simply orbiting a la kepler. Doing this rules out the many extraneous noises that produce strictly periodic signals. Is that what they found? At what signal strength? How does the signal strength compare with detection limits of other detectors?

Aha. The details do exist.

September 14, 2015 at 09:50:45 UTC the two detectors of the Laser Interferometer Gravitational-Wave Observatory simultaneously observed a transient gravitational-wave signal. The signal sweeps upwards in frequency from 35 to 250 Hz with a peak gravitational-wave strain of 1.0×10−21. It matches the waveform predicted by general relativity for the inspiral and merger of a pair of black holes and the ringdown of the resulting single black hole. The signal was observed with a matched-filter signal-to-noise ratio of 24 and a false alarm rate estimated to be less than 1 event per 203 000 years, equivalent to a significance greater than 5.1σ. The source lies at a luminosity distance of 410+160−180  Mpc corresponding to a redshift z=0.09+0.03−0.04. In the source frame, the initial black hole masses are 36+5−4M⊙ and 29+4−4M⊙, and the final black hole mass is 62+4−4M⊙, with 3.0+0.5−0.5M⊙c2 radiated in gravitational waves.

10^-21 is strong enough for every major gravitational wave detector to see. So expect to see independent confirmation soon.

Note the energy, though. The entire energy contained in three Suns. With E=mc^2 that’s one hell of a lot of energy. Plug 6*10^30 kg into that gives 5.4*10^38 gigajoules. Enough to power our modern civilization for …

mollwollfumble said:

mollwollfumble said:

Does anyone here know details?

For instance, I know they were looking for a signal technically known as a chirrup, a periodic signal where the frequency increases with time. For example this is produced when black holes spiral in together, rather than simply orbiting a la kepler. Doing this rules out the many extraneous noises that produce strictly periodic signals. Is that what they found? At what signal strength? How does the signal strength compare with detection limits of other detectors?

Aha. The details do exist.

September 14, 2015 at 09:50:45 UTC the two detectors of the Laser Interferometer Gravitational-Wave Observatory simultaneously observed a transient gravitational-wave signal. The signal sweeps upwards in frequency from 35 to 250 Hz with a peak gravitational-wave strain of 1.0×10−21. It matches the waveform predicted by general relativity for the inspiral and merger of a pair of black holes and the ringdown of the resulting single black hole. The signal was observed with a matched-filter signal-to-noise ratio of 24 and a false alarm rate estimated to be less than 1 event per 203 000 years, equivalent to a significance greater than 5.1σ. The source lies at a luminosity distance of 410+160−180  Mpc corresponding to a redshift z=0.09+0.03−0.04. In the source frame, the initial black hole masses are 36+5−4M⊙ and 29+4−4M⊙, and the final black hole mass is 62+4−4M⊙, with 3.0+0.5−0.5M⊙c2 radiated in gravitational waves.

My gosh! What a huge amount of energy!

Oh, I see you’ve already pointed to the large amount of energy. My apologies.

In the last second before the black holes merged, they released 50 times more energy than all the stars in all the galaxies in the universe were releasing, combined.

National Geographic

?

Kittamaru said: ↑
I read somewhere that this event apparently “gave off more energy than the rest of the universe combined”… which makes sense in a way – the high-speed collision of two bodies of super-high (could one claim near-infinite?) mass… I mean, damn!

Janus58 answer
It had more power than the output of the rest of the universe. Due to it’s brief nature, the energy was the equivalent of converting the mass of 3 Suns into energy.

http://www.sciforums.com/threads/gravitational-waves-from-black-hole-merger.155284/

So what caused the unusual ripple? was it the energy released when the two masses collided or was it the sudden increase in mass as the two masses merged?

Peak Warming Man said:

So what caused the unusual ripple? was it the energy released when the two masses collided or was it the sudden increase in mass as the two masses merged?

The first…….

more on the story

Gravitational Waves: What Their Discovery Means for Science and Humanity

how big is this graviton?

smaller than a photon?

CrazyNeutrino said:

more on the story

Gravitational Waves: What Their Discovery Means for Science and Humanity

how big is this graviton?

smaller than a photon?

It might be the particle Hawking describes as a zero energy IR photon and occupy infinite volume……….

This Einstein fellow should have stuck with his study of electrical engineering. It would have been way more lucrative in the long run.

sibeen said:

This Einstein fellow should have stuck with his study of electrical engineering. It would have been way more lucrative in the long run.

Some of us just have to know. Circumstances become inconsequential…….

doesn’t make a real lot of sense saying how “big” quantum particles are rather how much mass/energy they possess.

CrazyNeutrino said:

With 58 scientists working on the project here in Australia.

We have enough people to warrant building a gravity wave detector here .

use the NBN

we have a gravity wave detector here, in wa.

AIGO

Boris said:

we have a gravity wave detector here, in wa.

AIGO

We sure do. It had severe finance troubles not too long ago. I assume that it survived?

The actual wave form of the detected gravitational wave – or a rigged demo? From apod.