Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I Confusion about killing horizon in Carroll

  1. Apr 18, 2016 #1
    In the opening paragraph of section 6.3 Carroll defines a killing horizon to be a null hypersurface Σ where some killing vector field χμ becomes null. Later (on page 247 if you have the book) when distinguishing between static and stationary space times, he says that in a stationary, but not static spacetime, we still have the killing field Kμ = (∂t)μ , but it wont become null at the killing horizon. How is that possible? By definition that seems wrong. How do you have a killing horizon if thats not where your killing field becomes null?

  2. jcsd
  3. Apr 18, 2016 #2
    NVM got it ;-)
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted