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Pulsar that switches between Radio & X-Rays has scientists baffled



 
 
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  #11  
Old January 30th 13, 04:36 PM posted to sci.physics,sci.astro
Sam Wormley[_2_]
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Default Pulsar that switches between Radio & X-Rays has scientists baffled

On 1/29/13 4:06 PM, G=EMC^2 wrote:
They come out of poles for long photons and equator for short photons.
They have a time laps due to rotation. It fits. TreBert


No, that is not observed.


  #12  
Old January 30th 13, 05:44 PM posted to sci.physics,sci.astro
Brad Guth[_3_]
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Default Pulsar that switches between Radio & X-Rays has scientists baffled

On Jan 26, 10:04*am, Yousuf Khan wrote:
http://www.astronomy.com/~/link.aspx...4a7c-b34b-6f6c....

"Scientists have found that this object, whose radio emission is known
to switch on and off periodically, exhibits the same behavior, but in
reverse, when observed at X-ray wavelengths.

New observations of a highly variable pulsar using the European Space
Agency s (ESA) XMM-Newton are perplexing astronomers. Monitoring this
pulsar simultaneously in X-rays and radio waves, astronomers have
revealed that this source, whose radio emission is known to switch on
and off periodically, exhibits the same behavior, but in reverse, when
observed at X-ray wavelengths. It is the first time that a switching
X-ray emission has been detected from a pulsar, and the properties of
this emission are unexpectedly puzzling. As no current model is able to
explain this switching behavior, which occurs within only a few seconds,
these observations have reopened the debate about the physical
mechanisms powering the emission from pulsars."


It's probably a binary or trinary consideration, as are most variables
out there.
  #13  
Old February 2nd 13, 11:43 PM posted to sci.astro
Yousuf Khan[_2_]
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Posts: 1,692
Default Pulsar that switches between Radio & X-Rays has scientists baffled

On 29/01/2013 2:54 PM, dlzc wrote:
Dear Yousuf Khan:

On Tuesday, January 29, 2013 12:02:25 PM UTC-7, Yousuf Khan wrote:
On 29/01/2013 9:54 AM, Luigi Caselli wrote:

...
Finally we've found intelligent life in our Universe! Please call
SETI to understand what they're saying... :-)


We probably need the aliens to explain this to us.


I guess that the X-rays are particles falling in, and the radio waves
come from the stuff blown outwards (temporarily) by the X-ray
bombardment.


But I think the radio portion lasts longer than the x-ray portion. Plus
why would stuff be falling in regularly around it, unless it's got a
companion feeding it material. There's no mention of a companion.

Yousuf Khan
 




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