Magnetic fields of our Galaxy on large and small scales

Abstract

Magnetic fields have been observed on all scales in our Galaxy, from AU to kpc. With pulsar dispersion measures and rotation measures, we can directly measure the magnetic fields in a very large region of the Galactic disk. The results show that the large-scale magnetic fields are aligned with the spiral arms but reverse their directions many times from the inner-most arm (Norma) to the outer arm (Perseus). The Zeeman splitting measurements of masers in HII regions or star-formation regions not only show the structured fields inside clouds, but also have a clear pattern in the global Galactic distribution of all measured clouds which indicates the possible connection of the large-scale and small-scale magnetic fields.

arXiv comment9 pages. Invited Talk at IAU Symp.242, 'Astrophysical Masers and their Environments', Proceedings edited by J. M. Chapman & W. A. Baan

References in corpus (21)

• Pulsar rotation measures and the large-scale structure of Galactic magnetic field
• SCUBA Polarization Measurements of the Magnetic Field Strengths in the L183, L1544, and L43 Prestellar Cores
• Pulsar rotation measures and the magnetic structure of our Galaxy
• Radio polarization from the inner Galaxy at arcminute resolution
• A $\lambda$20cm Survey of the Galactic Center Region I: Detection of Numerous Linear Filaments
• The nature of bilateral supernova remnants
• Evidence for a Weak Galactic Center Magnetic Field from Diffuse Low Frequency Nonthermal Radio Emission
• Tracing protons through the Galactic magnetic field: a clue for charge composition of ultra-high energy cosmic rays
• First Results from SPARO: Evidence for Large-Scale Toroidal Magnetic Fields in the Galactic Center
• The spatial energy spectrum of magnetic fields in our Galaxy
• High-Resolution, Wide-Field Imaging of the Galactic Center Region at 330 MHz
• Enhanced small-scale Faraday rotation in the Galactic spiral arms
• Arecibo 430 MHz Pulsar Polarimetry: Faraday Rotation Measures and Morphological Classifications
• Interstellar Hydroxyl Masers in the Galaxy. II. Zeeman Pairs and the Galactic Magnetic Field
• Results of SPARO 2003: Mapping Magnetic Fields in Giant Molecular Clouds
• New Nonthermal Filaments at the Galactic Center: Are They Tracing a Globally Ordered Magnetic Field?
• Counterclockwise magnetic fields in the Norma spiral arm
• Amplification of Interstellar Magnetic Fields and Turbulent Mixing by Supernova-Driven Turbulence Part II - The Role of Dynamical Chaos
• The Galactic distribution of magnetic fields in molecular clouds and HII regions
• Extragalactic sources towards the central region of the Galaxy
• Polarization surveys of the Galaxy

Cited by in corpus (4)

• Ultra-High Energy Cosmic Rays Detected by Auger and AGASA:Corrections for Galactic Magnetic Field Deflections, Source Populations, and Arguments for Multiple-Components
• Pulsars as Fantastic Objects and Probes
• Neutrino magnetic moment signatures in the supernova neutrino signal
• Propagation of Ultra-high-energy Cosmic Rays in Galactic Magnetic Field