Table 1: Summary of the current constraints on the fractional polarisation ( ) of the AME both for individual Galactic objects and for large-scale (diffuse) measurements. Columns 1 to 3 indicate the region, the experiment used for this particular constraint, and the angular resolution, respectively. The following four columns indicate the constraints on the fractional polarisation ( ), separated according to the frequency band for an easier comparison. When quoting upper limits, the 95% confidence level is used. Last column provides the relevant references.

NameExperimentResolution (9–11 GHz)
(22 GHz)
(30–33 GHz)
(40 GHz)
References

Galactic AME regions
G159.6-18.5COSMOSOMAS [65]
WMAP-7<1.01<1.79<2.69[48]
WMAP-7<1.4<1.9<4.7[49]
OphiuchiCBI~9′<3.2[24]
WMAP-7<1.7<1.6<2.6[49]
LDN1622GBT~1.3′<2.7[10]
WMAP-7<2.6<4.8<8.3This work
Pleiades WMAP-7<12.2<32.0<95.8[21], this work
LPH96CBI~9′<10[23]
WMAP-7<1.3<2.5<7.4This work
HelixCBI~9′<8[66]

Diffuse Galactic AME
All sky WMAP-3<1<1<1[67]
All sky WMAP-5<5[16]