Extended Data Fig. 2: Comparison between the FAST observations and archival HI4PI data.
Upper panels: The integrated intensity maps of the HVC and foreground (fg) components of G165 by FAST and HI4PI. See Fig. 1 and Extended Data Fig. 1 for the integrated intensity maps of the VHVC component. Center panels: Channel maps of G165 VHVC by FAST with velocity resolution smoothed to 2 km/s (about one fiftieth of the velocity span). Lower panels: Channel maps of the foreground of G165 by FAST with velocity resolution smoothed to 0.3 km/s (about one fiftieth of the velocity span).
