| We present a comparative study of Lyman-alpha Halos at z~3 and z>6 to assess their evolution towards the end of reionization. We use MUSE data of very different depths to attain similar detection limits across both low and high redshift samples. With a novel approach we distinguish between objects with and without extended Lyα emission. Using HST-motivated prior, we perform narrowband image decomposition of Lyα halos where extended emission is detected. By comparing the prominence and properties of such halos at z~3, long after reionization ended, and z>6, at the tail of the reionization epoch, we show how the circumgalactic medium (CGM) reacts to the changes in the surrounding intergalactic medium and its ionisation state. We also present evidence for substantial variations in the line-of-sight HI attenuation towards z>6 LAEs correlated with overdensities. Our results will provide new constraints for theoretical studies of Lyα emission at the conclusion of cosmic reionization. |
