A line integral convolution (LIC) image of the GALFACTS sky as seen with the Arecibo telescope. Showing the polarised intensity (red is strong, blue is weak), and the orientation of the ordered magnetic fields observed at 1.4 GHz (flow lines).
A multiwavelength view of W50 (the Manatee nebulae) with microquasar SS433
at the centre. The ordered magnetic fields were observed using the Australia
Telescope Compact Array (ATCA) – covering a region of 2° x 1°, with 199
separate telescope pointings collected over 6 days (see next image). The object
is most likely an unusual supernova remnant – the reanimated corpse of a dead star
that underwent a cataclysmic explosion ~20,000 years ago.
A multiwavelength view of the W50 radio nebulae. Showing Hα (red),
radio (blue), and a measure of the ordered magnetic fields (green). See
the inverted relationship between red and green, showing the Hα is
nearer to us than the supernova remnant, and acts as a “Faraday screen”.
This “depolarises” the green emission and makes it hard to detect. The emission
we luckily do see is due to holes in these Faraday curtains.