EC098
Proper motion and B-field of H2O-WFPN I18443-0231
IRAS 18443-0231 stands out as the second spectroscopically confirmed planetary nebula (PN) with 'water fountain' characteristics (H2O masers tracing high-velocity collimated mass-loss of kinematical ages ~100 yr) and non-thermal radio continuum emission. The H2O masers display an S-shaped distribution and a circular arrangement, which could be related to a precessing jet and a toroidal structure, respectively. In addition, spatially resolved radio spectral index map reveals the existence of magnetized bipolar emission and non-thermal core, which could be correlated to the S-shaped WF and toroidal structure, respectively. With the observations requested here, we aim at revealing whether the spatio-kinematics of the S-shaped WF trace precessing mass-loss and a toroid, as well as measuring, for the first time in PNe, their magnetic field direction and strength, which will be key and novel data input for testing models of magnetic shaping of PNe.
Observation pages at the EVN archive:
This data is part of the archive of VLBI data maintained by JIVE on behalf of the EVN, a network of radio telescopes located primarily in Europe and Asia, with additional antennas in South Africa. The EVN archive itself has the DOI https://doi.org/10.17616/R3Z197