Very Long Baseline Array Observations of the Zeeman Effect in H2O Masers in W3 IRS 5

Details Very Long Baseline Array Observations of the Zeeman Effect in H2O Masers in W3 IRS 5 Very Long Baseline Array Observations of the Zeeman Effect in H2O Masers in W3 IRS 5

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001apj...554l.217s&link_type=abstract

The Astrophysical Journal, Volume 554, Issue 2, pp. L217-L220.

Astronomy and Astrophysics

Astronomy

40

Ism: Clouds, Ism: Magnetic Fields, Masers, Polarization, Radio Lines: Ism

Scientific paper

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.

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