VLBA Detection of the Zeeman effect in water masers

Details VLBA Detection of the Zeeman effect in water masers VLBA Detection of the Zeeman effect in water masers

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.4312s&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #43.12; Bulletin of the American Astronomical Society, Vol. 32, p.1470

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the first VLBA detection of the Zeeman effect in water masers. These results provide the first ultra-high spatial resolution data on magnetic field strength variations in star forming regions. The fields observed in four masers in the W3 IRS5 region range from -14 to -42 mG; the fields may be 5-10 times less if the Elitzur model for masers is adopted. These masers, for which we can independently measure the Zeeman effect, are separated by 25 mas (60 A.U.) or less. We shall also show that if the W3 IRS5 region were to be observed with lower resolution, the field detected would be smaller, in spite of the fact that the observed fields of the four masers have the same sign. Hence, we demonstrate that the magnetic fields inferred from VLBA Zeeman effect observations are the most reliable estimates to date for water masers.

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