Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...445l.113p&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 445, no. 2, p. L113-L116
Astronomy and Astrophysics
Astronomy
38
Absorption Spectra, Galactic Bulge, H I Regions, Interstellar Magnetic Fields, Line Spectra, Molecular Gases, Radio Astronomy, Radio Spectra, Zeeman Effect, Decimeter Waves, Galactic Structure, Ultrahigh Frequencies, Very Large Array (Vla)
Scientific paper
We have measured the Very Large Array (VLA) to search for Zeeman splitting of H I absorption against Sgr A West in order to measure directly the magnetic field strength along the line of sight. We report several directions within the circumnuclear molecular gas about 1 min north of Sgr A*. Our results show that the magnetic field is preferentially pointed toward us in this region with our most reliable detection being -3.0+/-0.5 mG. The highest detected fields appear to be associated with infalling gas rather than the circumnuclear disk itself. We suggest that the average line-of-sight component of the field within the circumnuclear disk as traced by the H I gas is less than 1 mG.
Crutcher Richard M.
Lo Kwok Yung
Plante Raymond Louis
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