[astro] the physics arXiv blog

[Eugen Leitl]

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From: the physics arXiv blog <howdy at arxivblog.com>
Date: Tue, 24 Jun 2008 14:06:51 -0500 (CDT)
To: eugen at leitl.org
Subject: the physics arXiv blog
Reply-To: the physics arXiv blog <howdy at arxivblog.com>


[1]the physics arXiv blog

   [2]Why black holes could be antimatter factories

   Posted: 24 Jun 2008 12:31 AM CDT

   [3]Black hole 

   Here's an interesting chain of thought...

   Imagine a black hole sucking in protons and electrons. With their
   higher mass,  protons are likely to be preferentially sucked, giving
   the black hole a positive charge. (That's not so unusual in space: a
   similar mechanism can give planets a charge because electrons escape
   their gravity more easily.)

   But black holes also create such strong electrostatic fields at the
   horizon that positrons and electrons simply appear out of the vacuum.

   In those circumstances, it'll look as if the protons being sucked into
   the black hole are being converted into positrons.

   So these kinds of black holes will look and behave like antimatter
   factories, say Cosimo Bambi from Wayne State University in Detroit and
   pals.

   How might we we spot these exotic objects? Bambi and friends say a
   sure signature would be an excess of positrons in cosmic rays  with an
   energy between 1 and 100 MeV coming from a black hole.

   Anybody seen any of these?

   Ref: [4]arxiv.org/abs/0806.3440: Black Holes as Antimatter Factories

   [5][arXivblog?i=Cjs3Pz] 
   [6][arXivblog?i=oL2SVI] [7][arXivblog?i=yR47HI]
   [8][arXivblog?i=V8xZli] [9][arXivblog?i=1fUqwI]
   [10][arXivblog?i=LLKigi] [11][arXivblog?i=jSAeYI]
   [12][arXivblog?i=PkKqti] [13][arXivblog?i=f4BAJI] 
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References

   1. http://arxivblog.com/
   2. http://feeds.feedburner.com/~r/arXivblog/~3/318633918/
   3. http://arxivblog.com/wp-content/uploads/2008/06/black-hole.jpg
   4. http://arxiv.org/abs/0806.3440
   5. http://feeds.feedburner.com/~a/arXivblog?a=Cjs3Pz
   6. http://feeds.feedburner.com/~f/arXivblog?a=oL2SVI
   7. http://feeds.feedburner.com/~f/arXivblog?a=yR47HI
   8. http://feeds.feedburner.com/~f/arXivblog?a=V8xZli
   9. http://feeds.feedburner.com/~f/arXivblog?a=1fUqwI
  10. http://feeds.feedburner.com/~f/arXivblog?a=LLKigi
  11. http://feeds.feedburner.com/~f/arXivblog?a=jSAeYI
  12. http://feeds.feedburner.com/~f/arXivblog?a=PkKqti
  13. http://feeds.feedburner.com/~f/arXivblog?a=f4BAJI
  14. http://arxivblog.com/
  15. http://www.feedburner.com/fb/a/emailunsub?id=8632699&key=kesJ612ZsV
  16. http://feeds.feedburner.com/arXivblog
  17. http://feeds.feedburner.com/arXivblog

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Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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