The magnetic fields in the galactic center: Detection of H I Zeeman splitting

R. L. Plante, K. Y. Lo, R. M. Crutcher

Research output: Contribution to journalArticlepeer-review

Abstract

We have used the Very Large Array 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 detections within the circumnuclear molecular gas about 1′ 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.

Original languageEnglish (US)
Pages (from-to)L113-L116
JournalAstrophysical Journal
Volume445
Issue number2 PART 2
DOIs
StatePublished - Jun 1 1995

Keywords

  • Galaxy: center
  • ISM: magnetic fields
  • Polarization
  • Radio lines: ISM

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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