Producing Synthetic Maps of Dust Polarization using Velocity Channel
  Gradient Technique
  In modern cosmology, many efforts have been put to detect primordial B-mode
of cosmic microwave background (CMB) polarization from the gravitational waves
generated during inflation. Considering the foreground dust contamination of
microwave polarization maps, it is essential to obtain a precise prediction for
polarization in dust emission. In this work, we show a new method to produce
synthetic maps of dust polarization in magnetized turbulent ISM from more
abundant high-resolution HI data. By using Velocity Channel Gradient (VChG)
technique, we are able to predict both direction and degree of dust
polarization by investigating spectroscopic HI information in
position-position-velocity (PPV) space. We applied our approach to The Galactic
Arecibo L-band feed Array HI (GALFA-HI) data, and find a good correspondence
between synthesized maps and PLANCK's polarization measurements at 353 GHz.
