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- W2951061718 abstract "We present large-field (4.25~$times$~3.75 deg$^2$) mapping observations toward the Galactic region centered at $l = 150arcdeg, b = 3.5arcdeg$ in the $J = 1-0$ emission line of CO isotopologues ($^{12}$CO, $^{13}$CO, and C$^{18}$O), using the 13.7 m millimeter-wavelength telescope of the Purple Mountain Observatory. Based on the $^{13}$CO observations, we reveal a filamentary cloud in the Local Arm at a velocity range of $-$0.5 to 6.5~km~s$^{-1}$. This molecular cloud contains 1 main filament and 11 sub-filaments, showing the so-called ridge-nest structure. The main filament and three sub-filaments are also detected in the C$^{18}$O line. The velocity structures of most identified filaments display continuous distribution with slight velocity gradients. The measured median excitation temperature, line width, length, width, and linear mass of the filaments are $sim$9.28~K, 0.85~km~s$^{-1}$, 7.30~pc, 0.79~pc, and 17.92~$M_sun$~pc$^{-1}$, respectively, assuming a distance of 400~pc. We find that the four filaments detected in the C$^{18}$O line are thermally supercritical, and two of them are in the virialized state, and thus tend to be gravitationally bound. We identify in total 146 $^{13}$CO clumps in the cloud, about 77$%$ of the clumps are distributed along the filaments. About 56$%$ of the virialized clumps are found to be associated with the supercritical filaments. Three young stellar object (YSO) candidates are also identified in the supercritical filaments, based on the complementary infrared (IR) data. These results indicate that the supercritical filaments, especially the virialized filaments, may contain star-forming activities." @default.
- W2951061718 created "2019-06-27" @default.
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- W2951061718 date "2017-03-23" @default.
- W2951061718 modified "2023-09-27" @default.
- W2951061718 title "CO(<i>J</i>= 1–0) Observations of a Filamentary Molecular Cloud in the Galactic Region Centered at<i>l</i>= 150°,<i>b</i>= 3.°5" @default.
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- W2951061718 doi "https://doi.org/10.3847/1538-4357/aa6443" @default.
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