Abstract
ABSTRACT In this work, we report the role of turbulence (measured by the $^{12}\mathrm{ CO}$ linewidth, $\Delta V$) on the offset between the orientation of local magnetic field in the low-density regions of dark clouds ($\theta ^{\mathrm{ env}}_\mathrm{ B}$) and the position angle of the Galactic Plane (GP; $\theta _{\mathrm{ GP}}$) in 15 low-mass isolated molecular clouds. We find a dependency of $\Delta V$ on offset, ($\theta _{\mathrm{ off}} =|\theta ^{\mathrm{ env}}_\mathrm{ B}-\theta _{\mathrm{ GP}}|$), represented by a second-order polynomial equation, $\theta _{\mathrm{ off}}=(3.328 \pm 1.187) {\Delta V}^2 - (0.991 \pm 5.541) {\Delta V} + (4.767 \pm 5.309)$. In regions where the majority of low turbulence is observed, characterized by $\Delta V \ \lt\ 3.1 \ \mathrm{ km\,s}^{-1}$, the envelope magnetic fields closely align with the orientation of the GP ($\theta _{\mathrm{ off}}\ \lt\ 20^\circ$). Conversely, in areas exhibiting high turbulence with $\Delta V \ \gt\ 3.1 \ \mathrm{ km\,s}^{-1}$ (for clouds CB130 and CB188), the envelope magnetic field tends to misalign with the GP ($\theta _{\mathrm{ off}}\ \gt\ 50^\circ$). This suggests that turbulence could be one of the important factors influencing the alignment of the local magnetic field with the GP. We have also explored the potential link between gas density of clouds ($\rho$) and turbulence ($\Delta V$) for the first time, utilizing data from 10 isolated clouds. This analysis suggests a possible correlation, with the observed trend quantified as, $\Delta V \propto \rho ^{-0.19}$.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.