We find that turbulence is the dominant internal pressure to support the fragmentation of filaments instead of thermal pressure. The velocity structures of most filaments present continuous distributions with slight velocity gradients. Gaussian fittings to the inner parts of the radial density profiles lead to a mean FWHM width of 1.13 ± 0.01 pc. We have identified eight filaments with a length of 6.38–28.45 pc, a mean H 2 column density of 0.70 × 10 21–6.53 × 10 21 cm −2, and a line mass of 20.24–161.91 M ☉ pc −1, assuming a distance of ∼1.7 kpc. Based on the 13CO ( J = 1 − 0) data, we find five molecular clouds within the velocity range between −25 and 8 km s −1 that are all characterized by conspicuous filamentary structures. We present observations of the CO isotopologues ( 12CO, 13CO, and C 18O) toward the Galactic region with 169 75 ≤ l ≤ 174 75 and −0 75 ≤ b ≤ 0 5 using the Purple Mountain Observatory 13.7 m millimeter-wavelength telescope.
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