Hawking radiation temperature -- observer dependent?

  • Thread starter bcrelling
  • Start date
  • #1
69
2
Black holes are claimed to radiate at a temperature corresponding to the hawking radiation. But who is measuring the temperature? If the radiation is measured from far away the red shift will indicate a lower temperature won't it?

Is the temperature given by the formula as measured from a hypothetical probe suspended at the event horizon? If so, will the proper acceleration of the probe experience unruh radiation too, or in this case would they be one and the same thing(unruh and hawking radiation)?
 

Answers and Replies

  • #2
Doug Huffman
Gold Member
804
111
There is an absolute temperature scale.
 
  • #3
Demystifier
Science Advisor
Insights Author
Gold Member
11,533
4,061
Hawking temperature is the temperature measured by an observer far away from the horizon. An observer close to the horizon will see a higher temperature.
 
  • #4
69
2
Hawking temperature is the temperature measured by an observer far away from the horizon. An observer close to the horizon will see a higher temperature.

Would the increased temperature as measured by an observer at the horizon be definable?

Is this where the idea of the black hole fire wall comes from?
 
  • #5
Demystifier
Science Advisor
Insights Author
Gold Member
11,533
4,061
Would the increased temperature as measured by an observer at the horizon be definable?
It would be infinite, but infinity can be replaced by a large finite number by appropriate regularization.

Is this where the idea of the black hole fire wall comes from?
It is closely related to it.
 

Related Threads on Hawking radiation temperature -- observer dependent?

  • Last Post
Replies
8
Views
2K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
5
Views
1K
  • Last Post
Replies
1
Views
2K
  • Last Post
2
Replies
46
Views
7K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
3
Views
5K
  • Last Post
Replies
15
Views
3K
  • Last Post
Replies
2
Views
1K
C
  • Last Post
Replies
11
Views
2K
Top