Poster abstract details

Magnetic field of two Water Fountains
A. F. Pérez-Sánchez, W. H. T. Vlemmings, J. M. Chapman

Abstract

We present the morphology and linear polarization of the 22GHz H$_{2}$O masers in the high-velocity outflow of two water fountain sources, IRAS 15445-5449 and IRAS 18043-2116. Different levels of saturated maser emission have been detected for both sources. The fractional polarization levels measured for the maser features of IRAS 15445-5449 indicate that the polarization vectors are tracing the poloidal component of the magnetic field in the emitting region. For IRAS 18043-2116 we have measured low levels of fractional linear polarization. The magnetic field in the H$_{2}$O maser region of this source is thus likely the toroidal or poloidal component.