We present spectro-polarimetric observations of several molecular lines obtained with the Submillimeter Array (SMA) toward the carbon rich AGB star IRC+10216. We have detected and mapped the linear polarization of the CO 3-2, SiS 19-18 and CS 7-6 lines. The polarization arises at a distance of ~450 AU from the star and is blueshifted with respect the Stokes I. The SiS 19-18 polarization pattern appears to be consistent with a locally radial magnetic field configuration. However, the CO 3-2 and CS 7-6 line polarization suggests an overall complex magnetic field morphology within the envelope. This work demonstrates the feasibility of using spectro-polarimetric observations to carry out tomographic imaging of the magnetic field in circumstellar envelopes.
@article{arxiv.1204.4381,
title = {Mapping the Linearly Polarized Spectral Line Emission around the Evolved Star IRC+10216},
author = {J. M. Girart and N. Patel and W. Vlemmings and Ramprasad Rao},
journal= {arXiv preprint arXiv:1204.4381},
year = {2015}
}
Comments
Accepted for publication in The Astrophysical Journal Letters. 10 pages, 3 figures