Circular Polarization of Circumstellar Water Masers: Magnetic Fields of AGB stars

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dc.creatorVlemmings, W. H. T.
dc.creatorDiamond, P. J.
dc.creatorvan Langevelde, H. J.
dc.date2003-09-05
dc.date.accessioned2026-07-07T02:09:27Z
dc.date.available2026-07-07T02:09:27Z
dc.descriptionWe present circular polarization measurements of circumstellar water masers around 2 Mira variables and 4 supergaint stars. Both an LTE and non-LTE method are used to analyze the circular polarization and total intensity spectra and to obtain the magnetic field strength. The non-LTE method is found to be able to reproduce the observations best. Using this, we find fields from a few hundred milliGauss up to a few Gauss, indicating a solar-type r^(-2) dependence of the magnetic field on the distance, which leads to stellar surface magnetic fields of up to several hundred Gauss. No linear polarization is detected to less than 1.5%.
dc.description5 pages, 2 figures; to appear in the PASP conference proceeding of the VLBA 10th Anniversary Meeting
dc.identifierhttps://arxiv.org/abs/astro-ph/0309185
dc.identifierhttp://arxiv.org/abs/astro-ph/0309185
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/6439
dc.subjectAstrophysics
dc.titleCircular Polarization of Circumstellar Water Masers: Magnetic Fields of AGB stars
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