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- W3044503316 abstract "The recent development of the velocity gradient technique allows observers to map magnetic field orientations and magnetization using the direction of velocity gradients. Aside from the directions, amplitudes of velocity gradients also contain valuable information about the underlying properties of magnetohydrodynamic (MHD) turbulence. In this paper, we explore what physical information is contained in the amplitudes of velocity gradients and discuss how this information can be used to diagnose properties of turbulence in both diffuse and self-gravitating interstellar media. We identify the relations between amplitudes of both intensity and velocity centroid gradients and the sonic Mach number Ms, and they are consistent with the theory's predictions. We test the robustness of the method and discuss how to utilize the amplitudes of gradients into self-gravitating media. To extend the velocity gradient technique, we also discuss the usage of amplitude method to position–position–velocity space as a possible way to retrieve the velocity channel maps before the contamination of thermal broadening. We discuss that the velocity gradient technique with these advancements could potentially give a significantly more accurate statistical insight into the properties of magnetized turbulence." @default.
- W3044503316 created "2020-07-29" @default.
- W3044503316 creator A5028300061 @default.
- W3044503316 creator A5067206645 @default.
- W3044503316 date "2020-07-24" @default.
- W3044503316 modified "2023-09-24" @default.
- W3044503316 title "Advancing the Velocity Gradient Technique: Using Gradient Amplitudes and Handling Thermal Broadening" @default.
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- W3044503316 doi "https://doi.org/10.3847/1538-4357/ab9307" @default.
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