Dr Katia Ferrière (IRAP Toulouse)
I will review the observational properties of interstellar magnetic fields in the disk and halo of our Galaxy. These properties are inferred from a variety of observational methods, primarily based on polarization of starlight, polarization of dust infrared emission, Zeeman splitting, Faraday rotation, and synchrotron emission. I will discuss each of these methods in some detail and explain what it tells us about the strength, direction, and spatial structure of interstellar magnetic fields. I will then compare the observational properties to theoretical predictions from dynamo theory.