Status of Cosmic Strings and Stringy Inflation

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  • #2
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This seems like a homework assignment or project so before we can help why not elaborate more on what you think? this would allow others to comment better on your understanding of the topic.
 
  • #3
bapowell
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Cosmic strings are generally considered as an alternative to inflation when it comes to the formation of structure in the early universe. They were competitors for a while until WMAP showed that the density perturbations were dominantly adiabatic which is a hallmark prediction of inflation, not cosmic strings. It is still possible that cosmic strings formed in the early universe and they they contributed to structure formation, but they would contribute a very small amount.

Note that cosmic strings are not necessarily related to string theory or string cosmology -- different kind of string.
 
  • #4
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So they could be out there (cosmic strings), but would have little contribution to structure formation. Is that right?
 
  • #5
bapowell
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So they could be out there (cosmic strings), but would have little contribution to structure formation. Is that right?
Yes. I don't recall the upper limits, though.
 

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