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

Does any gravitating body emit Hawking radiation?

  1. Mar 17, 2012 #1
    The Hawking-Unruh temperature is given by the expression:

    [itex] \large T = \frac{\hbar g}{2 \pi c k} [/itex]

    where g is the gravitational acceleration at the surface of a black hole.

    Does this expression imply that any gravitating body will emit Hawking radiation?

    For example if we take the acceleration due to gravity at the Earth's surface to be [itex]g = 10 \ m/s^2[/itex] does that mean that the Earth emits Hawking radiation at a temperature [itex]T = 10^{-20} K[/itex]?

    John
     
  2. jcsd
  3. Mar 17, 2012 #2
    No. You have to have an event horizon to produce hawking radiation; but any body with an event horizon should do that (few examples besides black-holes).
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Does any gravitating body emit Hawking radiation?
  1. Hawking's radiation (Replies: 11)

Loading...