Abstract
We present Very Long Baseline Array (VLBA) observations of the Zeeman effect in H2O masers in W3 IRS 5. These observations have yielded the first ultrahigh spatial resolution maps of the magnetic field in a star-forming region measured via the Zeeman effect - masers for which we can independently measure the magnetic field are separated by ≤25 mas (60 AU). This is the first VLBA detection of the Zeeman effect in H2O masers in a star-forming region. These observations also remove the confusion in observed magnetic fields from closely spaced masers. We shall explicitly demonstrate that observations at lower resolution can yield lower magnetic fields than with the VLBA, even though there are no field reversals within the larger beam.
Original language | English |
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Pages (from-to) | L217-L220 |
Journal | Astrophysical Journal |
Volume | 554 |
Issue number | 2 PART 2 |
DOIs | |
State | Published - Jun 20 2001 |
Bibliographical note
Funding Information:4The National Radio Astronomy Observatory (NRAO) is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
Funding
4The National Radio Astronomy Observatory (NRAO) is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
Funders | Funder number |
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National Science Foundation (NSF) | AST 99-88341 |
National Aeronautics and Space Administration | |
University of Kentucky |
Keywords
- ISM: clouds
- ISM: magnetic fields
- Masers
- Polarization
- Radio lines: ISM
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science