Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2009-08-24
A&A, 507 (2009), 1087-1105
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
19 pages, 15 figures, accepted for publication in Astronomy and Astrophysics. The sizes of figures have been significantly red
Scientific paper
(Abridged) We present maps for various Galactic longitudes and latitudes at 1.4 GHz, which is the frequency where deep SKA surveys are proposed. The maps are about 1.5 deg in size and have an angular resolution of about 1.6 arcsec. We analyse the maps in terms of their probability density functions (PDFs) and structure functions. Total intensity emission is more smooth in the plane than at high latitudes due to the different contributions from the regular and random magnetic field. The high latitude fields show more extended polarized emission and RM structures than those in the plane, where patchy emission structures on very small scales dominate. The RM PDFs in the plane are close to Gaussians, but clearly deviate from that at high latitudes. The RM structure functions show smaller amplitudes and steeper slopes towards high latitudes. These results emerge from the fact that much more turbulent cells are passed through by the line-of-sights in the plane. Although the simulated random magnetic field components distribute in 3D, the magnetic field spectrum extracted from the structure functions of RMs conforms to 2D in the plane and approaches 3D at high latitudes. This is partly related to the outer scale of the turbulent magnetic field, but mainly to the different lengths of the line-of-sights.
Reich Wolfgang
Sun Xiao-Hui
No associations
LandOfFree
Simulated SKA maps from Galactic 3D-emission models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Simulated SKA maps from Galactic 3D-emission models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simulated SKA maps from Galactic 3D-emission models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-698132