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arxiv: astro-ph/0505148 · v1 · submitted 2005-05-09 · 🌌 astro-ph

Full-Polarization Observations of OH Masers in Massive Star-Forming Regions: I. Data

classification 🌌 astro-ph
keywords masersregionsstar-formingdatafull-polarizationmassiveabsorptionanalysis
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We present full-polarization VLBA maps of the ground-state, main-line, 2 Pi 3/2, J = 3/2 OH masers in 18 Galactic massive star-forming regions. This is the first large polarization survey of interstellar hydroxyl masers at VLBI resolution. A total of 184 Zeeman pairs are identified, and the corresponding magnetic field strengths are indicated. We also present spectra of the NH3 emission or absorption in these star-forming regions. Analysis of these data will be presented in a companion paper.

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    The paper presents predictions and observational plans for Zeeman effect measurements with SKA to provide statistical data on magnetic field strengths across scales in molecular clouds.