Fig. 4

View of the cloud-filament complex. The gray-scales show the integrated H i distribution derived from the 30′′ VLA data and run from 2 × 1019 (white) to 2 × 1021 cm-2 (black). Thin, black contours show the H i distribution of the cloud derived from the GBT data. Contour levels are (6.25, 12.5, 25, 62.5) × 1017 cm-2. White contours show the 8 kpc filament, derived from the 30′′ VLA data. The contour level is 2 × 1019 cm-2. The highest column density found in the filament is 6.5 × 1019 cm-2. The GBT and 30′′ VLA beams are indicated in the bottom-left corner. The thick gray line shows the location of the position-velocity slice shown in Fig. 6. The long-dashed circle indicates the 50 percent sensitivity level of the VLA primary beam. The short-dashed circle shows the 10 percent level.
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