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Fastest Binary Star! Powerful source of the elusive gravitationalwaves?
"Chandra data (above, graph) from observations of RX J0806.3+1527 (or
J0806), show that its X-ray intensity varies with a period of 321.5 seconds. This implies that J0806 is a binary star system where two white dwarf stars are orbiting each other (above, illustration) approximately every 5 minutes. The short orbital period implies that the stars are only about 50,000 miles apart, a fifth of the distance from the Earth to the Moon, and are moving in excess of a million miles per hour. According to Einstein's General Theory of Relativity, such a system should produce gravitational waves -ripples in space-time - that carry energy away from the system at the speed of light. Energy loss by gravitational waves will cause the stars to move closer together. X-ray and optical observations indicate that the orbital period of this system is decreasing by 1.2 milliseconds every year, which means that the stars are moving closer together at a rate of about 2 feet per day." http://chandra.harvard.edu/photo/2005/j0806/ http://i.ytimg.com/vi/ryqN6dyUmJg/0.jpg "With its extremely short orbital period, RX J0806.3+1527 is also a prime candidate for the detection of the elusive gravitational waves , predicted by Einstein's General Theory of Relativity. They have never been measured directly, but their existence has been revealed indirectly in binary neutron star systems. A planned gravitational wave space experiment, the European Space Agency's Laser Interferometer Space Antenna (LISA) that will be launched in about 10 years' time, will be sufficiently sensitive to be able to reveal this radiation from RX J0806.3+1527 with a high degree of confidence. Such an observational feat would open an entirely new window on the universe." http://www.eso.org/public/news/eso0211/ Double-A |
#2
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Fastest Binary Star! Powerful source of the elusive gravitationalwaves?
On Mar 11, 6:00*pm, Double-A wrote:
"Chandra data (above, graph) from observations of RX J0806.3+1527 (or J0806), show that its X-ray intensity varies with a period of 321.5 seconds. This implies that J0806 is a binary star system where two white dwarf stars are orbiting each other (above, illustration) approximately every 5 minutes. The short orbital period implies that the stars are only about 50,000 miles apart, a fifth of the distance from the Earth to the Moon, and are moving in excess of a million miles per hour. According to Einstein's General Theory of Relativity, such a system should produce gravitational waves -ripples in space-time - that carry energy away from the system at the speed of light. Energy loss by gravitational waves will cause the stars to move closer together. X-ray and optical observations indicate that the orbital period of this system is decreasing by 1.2 milliseconds every year, which means that the stars are moving closer together at a rate of about 2 feet per day." http://chandra.harvard.edu/photo/2005/j0806/ http://i.ytimg.com/vi/ryqN6dyUmJg/0.jpg "With its extremely short orbital period, RX J0806.3+1527 is also a prime candidate for the detection of the elusive gravitational waves , predicted by Einstein's General Theory of Relativity. They have never been measured directly, but their existence has been revealed indirectly in binary neutron star systems. A planned gravitational wave space experiment, the European Space Agency's Laser Interferometer Space Antenna (LISA) that will be launched in about 10 years' time, will be sufficiently sensitive to be able to reveal this radiation from RX J0806.3+1527 with a high degree of confidence. Such an observational feat would open an entirely new window on the universe." http://www.eso.org/public/news/eso0211/ Double-A Binary dwarfs as supposedly tidal face-locked and separated by just 80,000 km and worth .37 solar mass each. At some point in the near future (perhaps a few thousands years from now), their ever increasing orbital frequency and the combined magnetic force has to take over and draw these two similar white dwarfs together, unless it’s running like a magnetic bearing that’s perpetually isolating one another regardless of those substantial gravitational forces (5.7e33 N). Electrons repulse one another, which should also help prolong their binary status. At only 80,000 km separation, whereas being near equal mass is pretty much required, and otherwise I agree with the final outcome being a neutron star unless the merger goes into a hyper/superluminal explosion where everything gets expelled. It’s actually more likely that Sirius(B) gets to become a neutron star about the same time as the human species goes extinct here on Earth. ~ BG |
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Fastest Binary Star! Powerful source of the elusive gravitationalwaves?
On Mar 12, 3:34*am, Brad Guth wrote:
On Mar 11, 6:00*pm, Double-A wrote: "Chandra data (above, graph) from observations of RX J0806.3+1527 (or J0806), show that its X-ray intensity varies with a period of 321.5 seconds. This implies that J0806 is a binary star system where two white dwarf stars are orbiting each other (above, illustration) approximately every 5 minutes. The short orbital period implies that the stars are only about 50,000 miles apart, a fifth of the distance from the Earth to the Moon, and are moving in excess of a million miles per hour. According to Einstein's General Theory of Relativity, such a system should produce gravitational waves -ripples in space-time - that carry energy away from the system at the speed of light. Energy loss by gravitational waves will cause the stars to move closer together. X-ray and optical observations indicate that the orbital period of this system is decreasing by 1.2 milliseconds every year, which means that the stars are moving closer together at a rate of about 2 feet per day." http://chandra.harvard.edu/photo/2005/j0806/ http://i.ytimg.com/vi/ryqN6dyUmJg/0.jpg "With its extremely short orbital period, RX J0806.3+1527 is also a prime candidate for the detection of the elusive gravitational waves , predicted by Einstein's General Theory of Relativity. They have never been measured directly, but their existence has been revealed indirectly in binary neutron star systems. A planned gravitational wave space experiment, the European Space Agency's Laser Interferometer Space Antenna (LISA) that will be launched in about 10 years' time, will be sufficiently sensitive to be able to reveal this radiation from RX J0806.3+1527 with a high degree of confidence. Such an observational feat would open an entirely new window on the universe." http://www.eso.org/public/news/eso0211/ Double-A Binary dwarfs as supposedly tidal face-locked and separated by just 80,000 km and worth .37 solar mass each. At some point in the near future (perhaps a few thousands years from now), their ever increasing orbital frequency and the combined magnetic force has to take over and draw these two similar white dwarfs together, unless it’s running like a magnetic bearing that’s perpetually isolating one another regardless of those substantial gravitational forces (5.7e33 N). *Electrons repulse one another, which should also help prolong their binary status. *At only 80,000 km separation, whereas being near equal mass is pretty much required, and otherwise I agree with the final outcome being a neutron star unless the merger goes into a hyper/superluminal explosion where everything gets expelled. It’s actually more likely that Sirius(B) gets to become a neutron star about the same time as the human species goes extinct here on Earth. Supposedly Sirius B that’s roughly as massive as sol, roughly the size of Earth and spins at 23 rpm, should be making its magnetic field a whole lot easier to measure, however no such public archived measurement or even good swag seems to exist. It has been suggested; at least 10% of white dwarfs have 1e6 gauss/m2 to work with, and Sirius(B) is likely one of the more robust dwarfs that should easily exceed that base amount of compacted stellar magnetic intensity and possibly offer 1e9 gauss, thus making it easier to rebuild mass by collecting whatever nearby passing stuff and of course pulling hydrogen away from those terrific Sirius(A) CMEs and otherwise sucking up those regular protons and electrons from the Sirius(A) solar wind should get picked up and held by Sirius(B). ~ BG |
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Fastest Binary Star! Powerful source of the elusive gravitationalwaves?
On Mar 11, 9:00*pm, Double-A wrote:
"Chandra data (above, graph) from observations of RX J0806.3+1527 (or J0806), show that its X-ray intensity varies with a period of 321.5 seconds. This implies that J0806 is a binary star system where two white dwarf stars are orbiting each other (above, illustration) approximately every 5 minutes. The short orbital period implies that the stars are only about 50,000 miles apart, a fifth of the distance from the Earth to the Moon, and are moving in excess of a million miles per hour. According to Einstein's General Theory of Relativity, such a system should produce gravitational waves -ripples in space-time - that carry energy away from the system at the speed of light. Energy loss by gravitational waves will cause the stars to move closer together. X-ray and optical observations indicate that the orbital period of this system is decreasing by 1.2 milliseconds every year, which means that the stars are moving closer together at a rate of about 2 feet per day." http://chandra.harvard.edu/photo/2005/j0806/ http://i.ytimg.com/vi/ryqN6dyUmJg/0.jpg "With its extremely short orbital period, RX J0806.3+1527 is also a prime candidate for the detection of the elusive gravitational waves , predicted by Einstein's General Theory of Relativity. They have never been measured directly, but their existence has been revealed indirectly in binary neutron star systems. A planned gravitational wave space experiment, the European Space Agency's Laser Interferometer Space Antenna (LISA) that will be launched in about 10 years' time, will be sufficiently sensitive to be able to reveal this radiation from RX J0806.3+1527 with a high degree of confidence. Such an observational feat would open an entirely new window on the universe." http://www.eso.org/public/news/eso0211/ Double-A Two men got the Nobel for predicting and measuring such a system TreBert |
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Fastest Binary Star! Powerful source of the elusive gravitationalwaves?
On Mar 11, 6:00 pm, Double-A posted this excerpt:
A planned gravitational wave space experiment, the European Space Agency's Laser Interferometer Space Antenna (LISA) that will be launched in about 10 years' time, will be sufficiently sensitive to be able to reveal this radiation from RX J0806.3+1527 with a high degree of confidence. Such an observational feat would open an entirely new window on the universe." Gravitational wave detection schemes are configured to detect transversely-polarized/ quadrupole waves arriving from above. For example see the LIGO system (pg. 6)- http://zebu.uoregon.edu/~rayfrey/QNet/LIGO-2.pdf Presumably VIRGO and LISA are likewise so configured. But if GWs are not transversely polarized but rather are of *longitudinal* polarization, these detectors will be deaf to the waves. The belief in transverse polarization springs from the earliest days of general relativity. It is rooted in the belief that space is a 'Void-Nothing' and as such could not support longitudinal (compression-rarefaction) waves. Therefore 'The Math' had to describe the premise of transverse polarization and is modeled on the manner in which sound propagates in solids, It has been "grandfathered" down to the present day, and dictates the design of GW detectors The kicker is - if space is *not* a Void-Nothing but a very real medium that's compressible/expansible and amenable to density gradients, GWs will be longitudinally polarized compression- rarefaction waves exactly analogous to sound waves in air. The above described detectors *might*, incidentally, be capable of hearing longitudinal waves arriving laterally. In such a case, they would be a scientific mega-boondoggle paling to insignifigance the HST primary mirror fiasco. |
#6
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Fastest Binary Star! Powerful source of the elusive gravitationalwaves?
On Mar 12, 5:33*am, bert wrote:
Two men got the Nobel for predicting and measuring such a system. Yep. Hulse-Taylor, for the so-named pulsar. |
#7
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Fastest Binary Star! Powerful source of the elusive gravitational waves?
"jughead" wrote in message
... On Mar 11, 6:00 pm, Double-A posted this excerpt: A planned gravitational wave space experiment, the European Space Agency's Laser Interferometer Space Antenna (LISA) that will be launched in about 10 years' time, will be sufficiently sensitive to be able to reveal this radiation from RX J0806.3+1527 with a high degree of confidence. Such an observational feat would open an entirely new window on the universe." Gravitational wave detection schemes are configured to detect transversely-polarized/ quadrupole waves arriving from above. For example see the LIGO system (pg. 6)- http://zebu.uoregon.edu/~rayfrey/QNet/LIGO-2.pdf Presumably VIRGO and LISA are likewise so configured. But if GWs are not transversely polarized but rather are of *longitudinal* polarization, these detectors will be deaf to the waves. The belief in transverse polarization springs from the earliest days of general relativity. It is rooted in the belief that space is a 'Void-Nothing' and as such could not support longitudinal (compression-rarefaction) waves. Therefore 'The Math' had to describe the premise of transverse polarization and is modeled on the manner in which sound propagates in solids, It has been "grandfathered" down to the present day, and dictates the design of GW detectors The kicker is - if space is *not* a Void-Nothing but a very real medium that's compressible/expansible and amenable to density gradients, GWs will be longitudinally polarized compression- rarefaction waves exactly analogous to sound waves in air. The above described detectors *might*, incidentally, be capable of hearing longitudinal waves arriving laterally. In such a case, they would be a scientific mega-boondoggle paling to insignifigance the HST primary mirror fiasco. $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ I think LISA might detect them, because there is most likely at least a small transverse component, and LISA might be sensitive enough to detect it. Of course, the kikker is that even if this happens, astronomers will still be unaware of the much more intense longitudinal component. happy days and... starry starry nights! -- Indelibly yours, Paine Ellsworth P.S.: "Our intuitions about motion through space will usually fail us if we try to apply them to the effects of space expansion." Odysseus of alt.astronomy P.P.S.: http://Astronomy.painellsworth.net http://PoisonFalls.painellsworth.net http://en.wikipedia.org/wiki/User:Paine_Ellsworth |
#8
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Fastest Binary Star! Powerful source of the elusive gravitationalwaves?
On Mar 12, 8:51*am, jughead wrote:
On Mar 12, 5:33*am, bert wrote: Two men got the Nobel for predicting and measuring such a system. Yep. Hulse-Taylor, for the so-named pulsar. Thanks oc I am getting alittle bad at names.Just a hint my brain might want to remember where I hid my 357 magnum. O ya TreBert |
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