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gravity waves may have been detected
- Thread starter igrowone
- Start date
Genghis Kush
Active member
I bought a Hunter's Ear listening device years ago. It is so you could hear things in the woods at a distance. I actually bought it for my mother to listen to TV because she hated hearing aides. It worked good. However, if there were people talking or other close noises they would be super loud.
If the cosmic microphone could hear a soccer ball size object moving anywhere in the Milky Way wouldn't it be drowned out by the sound of traffic or people crunching Doritos on Earth?
If the cosmic microphone could hear a soccer ball size object moving anywhere in the Milky Way wouldn't it be drowned out by the sound of traffic or people crunching Doritos on Earth?
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it's 2 microphones(interferometers), that will allow for discrimination of many noise sources
but the fine points of this type of signal processing are not known to me
more reading for sure, this is going to be hot for a while
Joseph Taylor and Russell Hulse discovered this in 1974 via different means.
measuring pulsar periodicity.
just sayin'. not that it makes this less important.
http://www.astro.cardiff.ac.uk/research/gravity/tutorial/?page=3thehulsetaylor
measuring pulsar periodicity.
just sayin'. not that it makes this less important.
http://www.astro.cardiff.ac.uk/research/gravity/tutorial/?page=3thehulsetaylor
Joseph Taylor and Russell Hulse discovered this in 1974 via different means.
measuring pulsar periodicity.
just sayin'. not that it makes this less important.
http://www.astro.cardiff.ac.uk/research/gravity/tutorial/?page=3thehulsetaylor
i did see that, i think i also saw that there was conflicting evidence
wasn't a completely accepted observation, if i recall correctly
i'm quite curious what the new detection tells us about black holes
are they really black? as in quantum information destroying things
i'm skeptical of that, but science will march on
i think there are some problems with measuring something that happened a billion and a half years ago...
Newton formulated maths for gravity. Einstein used Galileo relativity to express his own, and science advances according to new observations and technologies....
i see a close resemblance to electromagnetism and it may well be differences in electric potential are the source of gravity...imo.
exceptionally interesting content, thankx for posting.
Newton formulated maths for gravity. Einstein used Galileo relativity to express his own, and science advances according to new observations and technologies....
i see a close resemblance to electromagnetism and it may well be differences in electric potential are the source of gravity...imo.
exceptionally interesting content, thankx for posting.
hossthehermit
Member
a pair of balls make a good clock and a gravity wave detector. some would call it win win...
I got 2 of em ..one has communication ability....can hear shit I never heard before when using em..also makes you quieter in the woods...yeehaw...my is walkers game ear....
Astronomer from Moscow detected a new source of intense gamma-radiation in the sky
Astronomer discovered a new source that confirmed the fact that binary systems with strong colliding stellar winds comprise a separate new population of high-energy gamma-ray sources
Lomonosov Moscow State University
Credit: NASA/C. Reed
Analyzing the data collected by the Fermi Gamma-ray Space Telescope Maxim Pshirkov (The Sternberg Astronomical Institute, MSU) discovered a new source that confirmed the fact that binary systems with strong colliding stellar winds comprise a separate new population of high-energy gamma-ray sources. His article was published in the latest issue of 'Monthly Notices of the Royal Astronomical Society Letters':http://dx.doi.org/10.1093/mnrasl/slv205
Massive binary star systems with highly luminous and hot Wolf-Rayet stars and massive (tens solar masses) OB companion generate strong stellar winds. Its percussion may lead to producing a fierce photon flux with an energetic potential of more than a hundred mega electronvolt (MEV), when a distance separating stars is relatively short. That phenomenon was considered as a possible source of gamma-radiation for a long while.
Though such radiation was detected only once, with the famous Eta Carinae, which was observed for more than four centuries (particularly intensively - after 1834, when one of its stars underwebt an explosion and for some time was the most luminous star in the sky) ). Eta Carinae is comparatively close to Earth - around 7,5 -- 8 thousand light years. The stars in this system weight 120 and (30-80) solar masses respectively, and shine brighter than millions of suns. If they were 10 parsec (30 light years) away from the Earth, they would be just as luminous as the Moon, while the Sun would be invisible on such distance. Naturally, Eta Carinae was the first candidate to consider and seven years ago high-energy radiation from this system was finally detected.
However, one example was not enough to confirm the model of binary stars emitting high-energy radiation, and the search for similar sources was continued, which turned out to be a tricky task.
"Recent calculations proved such star types as Eta Carinae to be incredibly rare - probably, one per a galaxy like we inhabit, or less,' said Maxim Pshirkov, my colleagues' research resulted in no certain findings. In 2013 an American-Austrian research team composed a list of seven stellar systems containing Wolf-Rayet stars, where a radiation could most probably appear. This research was based on two years of observations and lacked data, so it was only possible to set an upper limit on the HE radiation. I decided toutilize larger set of data seven years of Fermi-LAT observations. As the result - it was discovered that Gamma Velorum is the source of gamma-radiation at 6.σ. confidence level"
This system contains two stars with masses of 30 and 10 solar masses. Their orbital parameters are well-studied and they are separated by about the same distance as Earth and Sun. The luminosity of this binary system is about 200 thousand times higher than of the Sun and strong stellar winds have very high mass loss rate: hundred-thousandth and two ten-millionth of the solar mass every year . Though these figures seem to be small, actually this amount is huge, particularly comparing to the solar wind which only amounts to 10-14 solar mass per annum As the stellar winds in the Gamma Velorum system collide on a speed exceeding 1000 kilometers per second, particles are accelerated in the shock. Though an exact mechanism of this acceleration is still unknown, it definitely leads to a high energy photon radiation that turned out to be detected by Fermi LAT.
An attentive reader who followed the process of searching for Higgs boson in the Large Hadron Collider has probably faced the standard deviation that Pshirkov mentions and remembered that in physics a hypothesis is proved on a statistical accuracy higher than 5σ. That means it is confirmed with a probability higher than 99,999%. In other words Pshirkov's discovery with its six standard deviations is definitely reliable, though it's still not far away from the threshold. According to the article, it was partly a pure luck that helped the researcher.
"Searching for similar sources in the very galactic plane is much more complicated, since it is a powerful gamma-ray source itself, and detecting small photon excess coming from colliding stellar winds becomes much more difficult with this background," says the scientist. "But the Gamma Velorum system lies above the plane surface and it is comparatively close to us. The discovery would not probably happen, if it was further away or closer to the plane."
https://mnrasl.oxfordjournals.org/content/457/1/L99
Astronomer discovered a new source that confirmed the fact that binary systems with strong colliding stellar winds comprise a separate new population of high-energy gamma-ray sources
Lomonosov Moscow State University
Credit: NASA/C. Reed
Analyzing the data collected by the Fermi Gamma-ray Space Telescope Maxim Pshirkov (The Sternberg Astronomical Institute, MSU) discovered a new source that confirmed the fact that binary systems with strong colliding stellar winds comprise a separate new population of high-energy gamma-ray sources. His article was published in the latest issue of 'Monthly Notices of the Royal Astronomical Society Letters':http://dx.doi.org/10.1093/mnrasl/slv205
Massive binary star systems with highly luminous and hot Wolf-Rayet stars and massive (tens solar masses) OB companion generate strong stellar winds. Its percussion may lead to producing a fierce photon flux with an energetic potential of more than a hundred mega electronvolt (MEV), when a distance separating stars is relatively short. That phenomenon was considered as a possible source of gamma-radiation for a long while.
Though such radiation was detected only once, with the famous Eta Carinae, which was observed for more than four centuries (particularly intensively - after 1834, when one of its stars underwebt an explosion and for some time was the most luminous star in the sky) ). Eta Carinae is comparatively close to Earth - around 7,5 -- 8 thousand light years. The stars in this system weight 120 and (30-80) solar masses respectively, and shine brighter than millions of suns. If they were 10 parsec (30 light years) away from the Earth, they would be just as luminous as the Moon, while the Sun would be invisible on such distance. Naturally, Eta Carinae was the first candidate to consider and seven years ago high-energy radiation from this system was finally detected.
However, one example was not enough to confirm the model of binary stars emitting high-energy radiation, and the search for similar sources was continued, which turned out to be a tricky task.
"Recent calculations proved such star types as Eta Carinae to be incredibly rare - probably, one per a galaxy like we inhabit, or less,' said Maxim Pshirkov, my colleagues' research resulted in no certain findings. In 2013 an American-Austrian research team composed a list of seven stellar systems containing Wolf-Rayet stars, where a radiation could most probably appear. This research was based on two years of observations and lacked data, so it was only possible to set an upper limit on the HE radiation. I decided toutilize larger set of data seven years of Fermi-LAT observations. As the result - it was discovered that Gamma Velorum is the source of gamma-radiation at 6.σ. confidence level"
This system contains two stars with masses of 30 and 10 solar masses. Their orbital parameters are well-studied and they are separated by about the same distance as Earth and Sun. The luminosity of this binary system is about 200 thousand times higher than of the Sun and strong stellar winds have very high mass loss rate: hundred-thousandth and two ten-millionth of the solar mass every year . Though these figures seem to be small, actually this amount is huge, particularly comparing to the solar wind which only amounts to 10-14 solar mass per annum As the stellar winds in the Gamma Velorum system collide on a speed exceeding 1000 kilometers per second, particles are accelerated in the shock. Though an exact mechanism of this acceleration is still unknown, it definitely leads to a high energy photon radiation that turned out to be detected by Fermi LAT.
An attentive reader who followed the process of searching for Higgs boson in the Large Hadron Collider has probably faced the standard deviation that Pshirkov mentions and remembered that in physics a hypothesis is proved on a statistical accuracy higher than 5σ. That means it is confirmed with a probability higher than 99,999%. In other words Pshirkov's discovery with its six standard deviations is definitely reliable, though it's still not far away from the threshold. According to the article, it was partly a pure luck that helped the researcher.
"Searching for similar sources in the very galactic plane is much more complicated, since it is a powerful gamma-ray source itself, and detecting small photon excess coming from colliding stellar winds becomes much more difficult with this background," says the scientist. "But the Gamma Velorum system lies above the plane surface and it is comparatively close to us. The discovery would not probably happen, if it was further away or closer to the plane."
https://mnrasl.oxfordjournals.org/content/457/1/L99
AvidLerner
Member
Gravity waves indicate there are cracks in time. Einstein predicted time travel is feasible due to gravitational waves. Now we know gravitational waves exist, we can start experimenting at the CERN facility to observe gravitational waves in a scientific setting, allowing us to get closer to true space travel as it is accomplished by the rest of the Universe.
Genghis Kush
Active member
"the dividing line between past, present, and future is an illusion". -Einstein
time is an illusion
time is an illusion
_tessarecting
ஓ
So is space.
AvidLerner
Member
GK. That is what I say all the time. That is the point exactly. We created time in order to understand how mass and energy interact. No time required. They just do and we just are like we are until our energy changes frequency.
AvidLerner
Member
Perception is your deception BY. Our brain and our own personal experiences determine what is. Recent scientific study showed light as both a wave and a particle. Light changed from one to the other because the oberver influenced the outcome. Ergo the Universe is willing to bend to our will to allow us to become truly happy. The universe itself possesses intelligence beyond our capacity to understand.
