Abstract
We update the limit from the 90 GHz Princeton IQU Experiment ground-based polarimeter on the magnitude of any polarized anisotropy of the cosmic microwave radiation. With a second year of data, we have now limited both Q and U on a ring of 1° radius. The window functions are broad: for E-mode polarization, the effective l is 〈lE〉 = 191 -132+143. We find that the E-mode signal can be no greater than 8.4 μK (95% CL), assuming no 5-mode polarization. Limits on a possible 5-mode signal are also presented.
Original language | English (US) |
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Pages (from-to) | L73-L76 |
Journal | Astrophysical Journal |
Volume | 573 |
Issue number | 2 II |
DOIs | |
State | Published - Jul 10 2002 |
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
Keywords
- Cosmic microwave background
- Cosmology: observations
- Early universe