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Fastest Binary Star! Powerful source of the elusive gravitationalwaves?



 
 
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  #1  
Old March 12th 10, 03:00 AM posted to alt.astronomy
Double-A[_3_]
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Posts: 4,635
Default 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  
Old March 12th 10, 12:34 PM posted to alt.astronomy
Brad Guth[_3_]
external usenet poster
 
Posts: 15,175
Default 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

  #3  
Old March 12th 10, 02:24 PM posted to alt.astronomy
Brad Guth[_3_]
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Posts: 15,175
Default 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
  #4  
Old March 12th 10, 02:33 PM posted to alt.astronomy
bert
external usenet poster
 
Posts: 1,997
Default 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
  #5  
Old March 12th 10, 02:49 PM posted to alt.astronomy
jughead
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Posts: 201
Default 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  
Old March 12th 10, 02:51 PM posted to alt.astronomy
jughead
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Posts: 201
Default 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  
Old March 12th 10, 04:55 PM posted to alt.astronomy
Painius Painius is offline
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First recorded activity by SpaceBanter: Jan 2007
Posts: 4,144
Default 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  
Old March 12th 10, 09:00 PM posted to alt.astronomy
bert
external usenet poster
 
Posts: 1,997
Default 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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