Sub-au imaging of water vapour clouds around four Asymptotic Giant Branch stars

I. Bains, R. J. Cohen, A. Louridas +4

We present MERLIN maps of the 22-GHz H2O masers around four low-mass late-type stars (IK Tau U Ori, RT Vir and U Her), made with an angular resolution of ~ 15 milliarcsec and a vel…