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We present Q-U-I JOint TEnerife (QUIJOTE) intensity and polarisation maps at10-20 GHz covering a region along the Galactic plane 24<l<45 deg, |b|<8 deg.These maps result from 210 h of data, have a sensitivity in polarisation of ~40muK/beam and an angular resolution of ~1 deg. Our intensity data are crucial toconfirm the presence of anomalous microwave emission (AME) towards the twomolecular complexes W43 (22 sigma) and W47 (8 sigma). We also detect at highsignificance (6 sigma) AME associated with W44, the first clear detection ofthis emission towards a SNR. The new QUIJOTE polarisation data, in combinationwith WMAP, are essential to: i) Determine the spectral index of the synchrotronemission in W44, beta_sync =-0.62 +/-0.03, in good agreement with the valueinferred from the intensity spectrum once a free-free component is included inthe fit. ii) Trace the change in the polarisation angle associated with Faradayrotation in the direction of W44 with rotation measure -404 +/- 49 rad/m2. Andiii) set upper limits on the polarisation of W43 of Pi_AME <0.39 per cent (95per cent C.L.) from QUIJOTE 17~GHz, and <0.22 per cent from WMAP 41 GHz data,which are the most stringent constraints ever obtained on the polarisationfraction of the AME. For typical physical conditions (grain temperature andmagnetic field strengths), and in the case of perfect alignment between thegrains and the magnetic field, the models of electric or magnetic dipoleemissions predict higher polarisation fractions.

monthly notices of the royal astronomical society

QUIJOTE Scientific Results. II. Polarisation Measurements of the  Microwave Emission in the Galactic molecular complexes W43 and W47 and  supernova remnant W44