Cloud-cloud collision as origin of the G31.41+0.31 massive protocluster
نویسندگان
چکیده
The G31.41+0.31 (G31) hot molecular core (HMC) is a high-mass protocluster showing accelerated infall and rotational spin-up that well studied at high-angular resolution. To complement the accurate view of small scale in G31, we have traced kinematics large-scale material by carrying out N$_2$H$^+$\,(1--0) observations with IRAM 30m telescope an area $\sim$6$\times6$\,arcmin$^2$ around HMC. N$_2$H$^+$ revealed (5\,pc) hub-filament system (HFS) composed least four filamentary arms NNE--SSW velocity gradient ($\sim$0.4\,km/s/pc) between northern southern filaments. linewidth increases towards hub center HFS reaching values 2.5--3\,km\,s$^{-1}$ central 1\,pc. origin likely cloud-cloud collision. In this scenario, filaments G31 would formed compression resulting from collision rotation HMC observed scales 1000\,au been induced shear caused few pc. We conclude represents compressed layer orthogonal orientation to plane sky, benchmark for filaments-to-clusters paradigm star formation.
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics
سال: 2022
ISSN: ['0004-6361', '1432-0746']
DOI: https://doi.org/10.1051/0004-6361/202243361