PULSAR-BASED GALACTIC MAGNETIC MAP: A LARGE-SCALE CLOCKWISE MAGNETIC FIELD WITH AN ANTICLOCKWISE ANNULUS

摘要: The rotation measure RM and location L of over 350 pulsars in the Milky Way are used to constrain structure large-scale magnetic field disk. Various directions various concentric circles employed mapping fit values, allowing testing models. This approach can build up signal-to-noise ratios by averaging across large rings (of size 1 kpc); at worst, this may miss a (double) reversal occurring within ring. My current work here begins with assumption rings. In best pulsar-based fit, an overall clockwise-going (as seen from north Galactic pole) extends radially least 12 kpc center, except for 2 wide anticlockwise located annulus between 4 6 center. has very special feature form string H II regions annulus. For mean pulsar as averaged radial rings, system only one anticlockwise-going produces lowest reduced ?2. All other fits different number field-reversed annuli have times larger ?2 or worse. Thus completely clockwise (no reversed ring) 5 Fits do not support more than magnetically Galaxy, coming 8 two opposite four six 9 alternating zones. Splitting above those below plane, single ring holds true separately plane plane. origin could be due factors (internal external) primordial (regular chaotic).