Constraints on new radiation degrees of freedom?
-
- Posts: 119
- Joined: March 02 2005
- Affiliation: University of Helsinki
Constraints on new radiation degrees of freedom?
What contraints does one have from the CMB on additional radiation degrees of freedom (that interact only gravitationally)? Presumably this has been looked at, but I don't remember seeing a paper on the topic.
-
- Posts: 183
- Joined: September 24 2004
- Affiliation: Brookhaven National Laboratory
- Contact:
Constraints on new radiation degrees of freedom?
Do you mean something along the lines of this paper: astro-ph/0110636?
-
- Posts: 119
- Joined: March 02 2005
- Affiliation: University of Helsinki
Constraints on new radiation degrees of freedom?
That's right, thanks. That (and astro-ph/0302337 and astro-ph/0303076 which refer to it) is just what I'm looking for.