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Status of Cosmic Strings and Stringy Inflation

  1. May 9, 2014 #1
    Which is the status of cosmic strings? Could they be related to inflation? Which are the most promising scenarios in which inflation arises/could arise in some way from a string cosmology?
    What do you think of the following papers?
  2. jcsd
  3. May 10, 2014 #2


    Staff: Mentor

    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.
  4. May 10, 2014 #3


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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.
  5. May 10, 2014 #4
    So they could be out there (cosmic strings), but would have little contribution to structure formation. Is that right?
  6. May 10, 2014 #5


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    Science Advisor

    Yes. I don't recall the upper limits, though.
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