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Third Gravitational Wave Detected From Black-Hole Merger 3 Billion Light Years Away (bbc.com)
sycodon quotes a report from The New York Times (Warning: may be paywalled; alternate source): Astronomers said Thursday that they had felt space-time vibrations known as gravitational waves from the merger of a pair of mammoth black holes resulting in a pit of infinitely deep darkness weighing as much as 49 suns, some 3 billion light-years from here. This is the third black-hole smashup that astronomers have detected since they started keeping watch on the cosmos back in September 2015, with LIGO, the Laser Interferometer Gravitational-Wave Observatory. All of them are more massive than the black holes that astronomers had previously identified as the remnants of dead stars. The latest detection was made at 10:11 GMT on January 4, and is described in a paper accepted for publication in the journal Physical Review Letters. "The analysis suggests the two black holes that coalesced had starting masses that were just over 31 times and 19 times that of our Sun," reports BBC. "And when they finally came together, they produced a single object of a little under 49 solar masses. It means the unison radiated a simply colossal quantity of pure energy."
and a long long time ago.
They have credibility. Rigorous scientists. Who the fuck are you? Exactly.
I do not want your cheap brainburning drugs. They are useless for work. And I am a working man today.
The instrument is called a laser interferometer, you dopey cunt.
I do not want your cheap brainburning drugs. They are useless for work. And I am a working man today.
What they "detected" was random noise. Nothing to see here.
They have two detectors now, one in Washington and the other in Louisiana. If they both trigger at nearly the same time, it's not random noise. This summer they'll add a third station in Pisa, Italy, which should not only help to collaborate the results, but also allow to triangulate the source.
How triangulation works for objects 3 bill. lightyears away. Wouldn't any triangle on Earth seem like a single dot for such a distance?
Patents Drive Free Software as Hurricanes Drive Construction Industry
That https://journals.aps.org/prl/a... was one hard read, here's one from LIGO explaining gravity waves and their detection http://ligo.org/science/Public...
The second LIGO detector is like 20 miles away, so when a gravity wave comes by I know I felt it :)
The difference in distance to the event that caused the waves on different places on Earth is indeed much smaller than the measurement uncertainty of the distance, but the detectors are receiving the same waves with different delays, so the relative distance can be measured very precisely. In addition, the detectors are not equally sensitive to signals from all directions, so the relative amplitudes measured by different detectors provides some information too.
The waves travel at light speed. The earth is sufficiently big to give noticeable delta in detection times, which allows you to find the place in the sky where the source of the waves is, no matter how far the object.
One solar mass of energy.
http://michaelsmith.id.au
It works because the speed of light delay in the signal changes the phase of the gravity waves, between different detectors.
http://michaelsmith.id.au
What makes you think the experiment depends on the gravitational constant being stable? What makes you think the folk at LIGO are waiting for you to explain the correlation/causation fallacy to them? What makes you think that gravitational waves are somehow linked to "electrical activity"? What makes you think that scientific projects with no immediate utility can survive without grants? What makes you think the entire purpose of science is to avoid doubt?
I have a lot of questions.
... to which satan added that it was a hell of a moth.
Nae king! Nae laird! Nae yurrupiean pressedent! We willna be fooled again!
"The analysis suggests the two black holes that coalesced had starting masses that were just over 31 times and 19 times that of our Sun," And when they finally came together, they produced a single object of a little under 49 solar masses
So, as a non-physicist, I have to ask what happened to the one remaining unit of solar mass since you started off with just over 50 units? I'd appreciate a serious answer, but I'm grabbing popcorn in anticipation of the normal /. replies.
Just another day in Paradise
It's the phase shift between receivers. You can't tell distance of course (unless you deduce it somehow from the signal itself) but you can tell the direction. The math should actually be slightly easier for an almost-flat wavefront.
Ezekiel 23:20
Using the time delta with only two detectors means the source "location" is defined by a cone.
That's why they're adding a 3rd detector.
BTW, I have a question: how close would you need to be to actually *feel* this black hole collision. Would you feel something rattling your bones if you were close enough ?
Non-Linux Penguins ?
Can someone explain to me how a non-direction, non-distance sensing device determined the direction and distance of a black hole merger that caused the waves because that sounds like absolute nonsense. A more accurate reading from it would be that they sensed gravitational waves but they could have been from absolutely anything anywhere and pinning down the source is impossible.
Not sure, but you will find it on the Organic Aisle and it will cost twice as much as regular energy.
When Fascism comes to America, it will call itself Anti-Fascism, and tell you to give up your guns.
Be sure to watch Veritasium's latest video on this.
Sdelat' Ameriku velikoy Snova!
Second detection
Date: December 26, 2015
Mass of first black hole: 14.2 solar masses
Mass of second black hole: 7.5 solar masses
Merged mass: 20.8 solar masses
Third detection
Date: January 4, 2017
Mass of first black hole: 31.2 solar masses
Mass of second black hole: 19.4 solar masses
Merged mass: 48.7 solar masses
LIGO snags another set of gravitational waves
If it's such an insane miracle to get hitched in the first place, it couldn't conceivably happen again.
I can't even get my head around what "weight" actually means in the context of a black hole, but assuming it even has weight, it seems to me that 49 suns must be a massive underestimate for a supermassive black hole given that both black holes that formed it have already been vaccuming up stars, suns and everything else for millions if not billions of years.
Astronomers said Thursday that they had felt space-time vibrations known as gravitational waves from the merger of a pair of mammoth black holes resulting in a pit of infinitely deep darkness weighing as much as 49 suns, some 3 billion light-years from here.
Pit of infinitely deep darkness, huh? There's some serious hyperbole.
Wrong too But why let facts get in the way of over the top hyperbole.
Sounds just like my ex-wife's soul! Ba dump dump spish!
Anyway just laughing a bit of the creative description... How is it any more of "pit of infinitely deep darkness" than one black hole. Infinity x 2 bitches! Sounds like something you say as a kid to one up your friend who just said shotgun times infinity to get the front seat....
"The analysis suggests the two black holes that coalesced had starting masses that were just over 31 times and 19 times that of our Sun," reports BBC. "And when they finally came together, they produced a single object of a little under 49 solar masses. It means the unison radiated a simply colossal quantity of pure energy."
I'm calling bullshit that Superman can hold one of these in his hand.
(-1: Post disagrees with my already-settled worldview) is not a valid mod option.
The likelihood of random noise creating a chirp consistent with a BH merger is very close to nil. The fact that two separate stations recorded the same chirp at the same time make this explanation very unlikely indeed.
The electrical activity part was alluding to how inventions often utilize zeitgeist as efficacy without much proof. But to answer your out-of-context question, electromagnetic waves can show-up by tugging of massive bodies the same way that gravitational waves are produced. However, gravitational waves are ridiculously weaker than electromagnetism, so it does not surprise me if there are confounding variables between Earth and 3 BILLION LIGHT YEARS away. But, it's okay because I've learned that AC's typically don't know anything and if they did or cared enough to back up what they say, they'd log in. Otherwise, thanks for stopping by to demonstrate your ability to disguise ad hominem in question form.
By the way, feel free to moderate this anyway you want but until there's an intelligent counter argument, have the decency to hold off for other's to say something. I'd moderate it back up myself, but I have too much integrity and not enough F's to give. People have proven to me a long time ago their inability to think for themselves, and I don't care if I'm right or wrong about anything just as long as there's a platform for insightful discussion.
No one cares what an AC thinks. For your sake, oh wait you're an AC so you are safe, I hope those scientists, if they even read this, aren't feminists. At least I have a good feeling what "cunt"ry you are from. I'm sorry if my 7.5 years of college education confuses you into thinking I'm using a thesaurus. But assuming this is the same AC from before, it's kind of sad how you're keeping tabs on this and only capable of responding in a way to as to defend yourself rather than the work of a field you clearly have yet to demonstrate any knowledge about. But if you want to blindly accept everything because it has the the word "scientist" attached to it, go ahead. And you are right, scientists are PEOPLE with feelings, emphasis on people, aka human-beings, aka subject to error like anyone else, and pardon me if I'm not buying everything they are selling. I'll say it again, 3 BILLION LIGHT YEARS.
Yes they do, but you are not supposed to. "Correlation does not imply causation" is a maxim taught in introductory statistics and without statistics, there's no backbone for the observed patterns that create sound theories. My favorite related quote though: âoeThe complexities of cause and effect defy analysis.â -- Douglas Adams.
But like I said before, I am more than happy for anyone to shed light with a counter-argument. I'm still waiting. I hope one of them does read this and explains things because it seems to me that people are terrified at questioning research right now because of current stereotypes associated with those in politics. It's becoming the new "You must be a racist because..." or "If you're not with us, you're against us." If people really cared about science and research like they claim, then they need to stop letting their beliefs dichotomize everything. Independent thinking has become a lost cause.