A limit on the polarized anisotropy of the cosmic microwave background at subdegree angular scales

Citation
Mm. Hedman et al., A limit on the polarized anisotropy of the cosmic microwave background at subdegree angular scales, ASTROPHYS J, 548(2), 2001, pp. L111-L114
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004-637X → ACNP
Volume
548
Issue
2
Year of publication
2001
Part
2
Pages
L111 - L114
Database
ISI
SICI code
0004-637X(20010220)548:2<L111:ALOTPA>2.0.ZU;2-C
Abstract
A ground-based polarimeter, PIQUE, operating at 90 GHz has set a new limit on the magnitude of any polarized anisotropy in the cosmic microwave backgr ound. The combination of the scan strategy and full width half-maximum beam of 0.24 degrees gives broad window functions with [iota (e)] = 211(-146)(294) and [iota (B)] = 212(-135)(+229) and for the E- and B-mode window func tions, respectively. A joint likelihood analysis yields simultaneous 95% co nfidence level flat band power limits of 14 and 13 muK on the amplitudes of the E- and B-mode angular power spectra, respectively. Assuming no B-modes , a 95% confidence limit of 10 muK is placed on the amplitude of the E-mode angular power spectrum alone.