| Topic: |
Science > Physics |
| User: |
"Sam Wormley" |
| Date: |
02 Apr 2006 10:40:02 AM |
| Object: |
An Extreme Spinning Pulsar |
An Extreme Spinning Pulsar
Science 31 March 2006:
Vol. 311. no. 5769, p. 1832
DOI: 10.1126/science.311.5769.1832b
http://www.sciencemag.org/cgi/content/short/311/5769/1832b
Pulsars are fast-spinning neutron stars that emit flashing twin radio
beams. For the last 23 years, the speed limit was set by the first such
pulsar discovered, which rotates at 642 hertz. Hessels et al. (p. 1901,
published online 12 January; see the Perspective by Grindlay) have now
found an even faster pulsar that spins 716 times a second. This extreme
pulsar was found with the giant Green Bank Telescope during a survey of
the globular cluster Terzan 5. From the pulsar's rotation speed, the
star's diameter is calculated to be less than 16 kilometers, and limits
can be placed on mechanisms for braking of the system by gravitation
radiation. The faintness of this pulsar suggests that even faster ones
await discovery.
See: http://www.sciencemag.org/cgi/content/short/311/5769/1832b
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| User: "hanson" |
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| Title: Re: An Extreme Spinning Pulsar |
02 Apr 2006 03:30:50 PM |
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"Sam Wormley" <swormley1@mchsi.com> wrote in message
news:mfSXf.77026$oL.38778@attbi_s71...
An Extreme Spinning Pulsar
Science 31 March 2006:
Vol. 311. no. 5769, p. 1832
DOI: 10.1126/science.311.5769.1832b
http://www.sciencemag.org/cgi/content/short/311/5769/1832b
Pulsars are fast-spinning neutron stars that emit flashing twin radio
beams. For the last 23 years, the speed limit was set by the first such
pulsar discovered, which rotates at 642 hertz. Hessels et al. (p. 1901,
published online 12 January; see the Perspective by Grindlay) have now
found an even faster pulsar that spins 716 times a second. This extreme
pulsar was found with the giant Green Bank Telescope during a survey of
the globular cluster Terzan 5. From the pulsar's rotation speed, the
star's diameter is calculated to be less than 16 kilometers, and limits
can be placed on mechanisms for braking of the system by gravitation
radiation. The faintness of this pulsar suggests that even faster ones
await discovery.
[hanson]
Do we mainly see pulsars which have their rot-axis, with their jets,
pointed towards the earth, or what is it that causes the regular
and slowing/fading pulsing, and is that pulse a spherical emission?
Are there any which show an increased faster pulse rate over time?
How many pulsars have been catalogued?
hanson
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| User: "tj Frazir" |
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| Title: Re: An Extreme Small Pulsar |
02 Apr 2006 04:28:40 PM |
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250 miles wide.
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| User: "tj Frazir" |
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| Title: Re: An Extreme Spinning Pulsar |
02 Apr 2006 04:27:39 PM |
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Well hanson ,,if the speed limit of rotaton is 1/2 just beause forward
is c ...
the faster the pulsar spun te less mass it could have .
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| User: "Sam Wormley" |
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| Title: Re: An Extreme Spinning Pulsar |
02 Apr 2006 06:54:45 PM |
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hanson wrote:
"Sam Wormley" <swormley1@mchsi.com> wrote in message
news:mfSXf.77026$oL.38778@attbi_s71...
An Extreme Spinning Pulsar
Science 31 March 2006:
Vol. 311. no. 5769, p. 1832
DOI: 10.1126/science.311.5769.1832b
http://www.sciencemag.org/cgi/content/short/311/5769/1832b
Pulsars are fast-spinning neutron stars that emit flashing twin radio
beams. For the last 23 years, the speed limit was set by the first such
pulsar discovered, which rotates at 642 hertz. Hessels et al. (p. 1901,
published online 12 January; see the Perspective by Grindlay) have now
found an even faster pulsar that spins 716 times a second. This extreme
pulsar was found with the giant Green Bank Telescope during a survey of
the globular cluster Terzan 5. From the pulsar's rotation speed, the
star's diameter is calculated to be less than 16 kilometers, and limits
can be placed on mechanisms for braking of the system by gravitation
radiation. The faintness of this pulsar suggests that even faster ones
await discovery.
[hanson]
Do we mainly see pulsars which have their rot-axis, with their jets,
pointed towards the earth, or what is it that causes the regular
and slowing/fading pulsing, and is that pulse a spherical emission?
Are there any which show an increased faster pulse rate over time?
How many pulsars have been catalogued?
hanson
That's a lot of questions
http://www.mhhe.com/physsci/astronomy/fix/student/chapter20/20f19.html
http://www.atnf.csiro.au/research/pulsar/psrcat/
http://www.astro.umd.edu/~miller/nstar.html
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| User: "hanson" |
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| Title: Re: An Extreme Spinning Pulsar |
03 Apr 2006 07:25:24 AM |
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"Sam Wormley" <swormley1@mchsi.com> wrote in message
news:9vZXf.874129$x96.301968@attbi_s72...
news:mfSXf.77026$oL.38778@attbi_s71...
An Extreme Spinning Pulsar
Science 31 March 2006:
Vol. 311. no. 5769, p. 1832
DOI: 10.1126/science.311.5769.1832b
http://www.sciencemag.org/cgi/content/short/311/5769/1832b
Pulsars are fast-spinning neutron stars that emit flashing twin radio
beams. For the last 23 years, the speed limit was set by the first such
pulsar discovered, which rotates at 642 hertz. Hessels et al. (p. 1901,
published online 12 January; see the Perspective by Grindlay) have now
found an even faster pulsar that spins 716 times a second. This extreme
pulsar was found with the giant Green Bank Telescope during a survey of
the globular cluster Terzan 5. From the pulsar's rotation speed, the
star's diameter is calculated to be less than 16 kilometers, and limits
can be placed on mechanisms for braking of the system by gravitation
radiation. The faintness of this pulsar suggests that even faster ones
await discovery.
[hanson]
Do we mainly see pulsars which have their rot-axis, with their jets, [1]
pointed towards the earth, or what is it that causes the regular
and slowing/fading pulsing, and is that pulse a spherical emission? [3]
Are there any which show an increased faster pulse rate over time?[4]
How many pulsars have been catalogued? [2]
hanson
[Sam]
That's a lot of questions
[A] http://www.mhhe.com/physsci/astronomy/fix/student/chapter20/20f19.html
[B] http://www.atnf.csiro.au/research/pulsar/psrcat/
[C] http://www.astro.umd.edu/~miller/nstar.html
[hanson]
..... ahahaha... "a lot"?.... it's 4 simple questions.... ahaha...
[A] just shows a pix of the jets I referred to in [1]: No answer.
[B] shows 1560 catalogued pulsars, as of year 2004/5
so why not just tell me "1560" instead, to [2] .....
since [B] does not answer [3] anyway..... ahahaha....
[C] is Miller's general pontification. It only mentions his (long prior
known) speculation of infalling globs of matter being the
cause for pulsing, but not why these globs do take the plunge
so regularly. --- Neitherone [A,B,nor C] answers [4]......
..... apparently my questions were not that simple after all.... ahaha..
But thanks for your efforts, Sam. I appreciate.
hanson
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| User: "tj Frazir" |
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| Title: Re: An Extreme Spinning Pulsar |
02 Apr 2006 04:19:04 PM |
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Thats a mass spinning at 1/2 c is the limit.
The surface of the mass is going 1/2 c or very near .
This mass is as big as statern but if it was as small as earth ...
You thought and ALL thought I was just insane ..NOW you agree just what
the 1/2 c does to the orbits of the particals in orbit in the atoms of
the stars rotation.
Knowing full well that motion is the orbital paths of all the particals
that orbit the center of evry atom.
IF it was as small as the earth 24000 mile equa
cir ..then 600 times that 144000 mps PAST 1/2
c.>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
144000 mps is far more then 1/2 c.
BUT 1/2 c is the max speed of any orbital or rotation of a planet ot any
object.
It cant go in a strait line faster
then c and cant go in circel faster then 1/2 c.
or 1/2 c devided by hrz is the size of the mass
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
the radius of it is then 250 mile wide.
Its surface is moving 1/2 c .............
and G becomes directional .............
it cant turn faster then 12 c....if I force "turn faster ? the direction
of G willl turn.
The low will be lower then a local low.
F is the distance from the center of the atoms mass to the center of the
atoms G.
So if the center of mass wount move the center of G will.
Ill leave it thee befor I put a magnet up beside a disk spinning at
1/2 c.
The orbital paths of the atoms in the disk will force the center of G
to move .
And that will change the center of G in any atoms near it.
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| User: "tj Frazir" |
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| Title: Re: An Extreme Spinning Pulsar |
03 Apr 2006 11:30:22 PM |
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Re: An Extreme Spinning Pulsar
Group: sci.physics Date: Sun, Apr 2, 2006, 5:19pm From:
GravityPhysics@webtv.net (tj=A0Frazir)
Thats a mass spinning at 1/2 c is the limit. The surface of the mass is
going 1/2 c or very near .
=A0=A0This mass is as big as statern but if it was as small as earth ...
You thought and ALL thought I was just insane ..NOW you agree just what
the 1/2 c does to the orbits of the particals in orbit in the atoms of
the stars rotation.
=A0=A0Knowing full well that motion is the orbital paths of all the
particals that orbit the center of evry atom.
=A0=A0IF it was as small as the earth 24000 mile equa cir ..then 600
times that 144000 mps PAST 1/2
c.>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
=A0=A0144000 mps is far more then 1/2 c.
BUT 1/2 c is the max speed of any orbital or rotation of a planet ot any
object.
It cant go in a strait line faster
then c and cant go in circel faster then 1/2 c.
or 1/2 c devided by hrz is the size of the mass
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
=A0=A0the radius of it is then 250 mile wide.
Its surface is moving 1/2 c ............. and G becomes directional
.............
it cant turn faster then 12 c....if I force "turn faster ? the direction
of G willl turn.
=A0=A0=A0=A0=A0=A0The low will be lower then a local low.
F is the distance from the center of the atoms mass to the center of the
atoms G.
=A0=A0So if the center of mass wount move the center of G will. Ill
leave it thee befor I put a magnet up beside a disk spinning at
1/2 c.
=A0=A0The orbital paths of the atoms in the disk will force the center
of G to move .
=A0=A0And that will change the center of G in any atoms near it.
.
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