A Dynamical Study of the Non–Star‐forming Translucent Molecular Cloud MBM 16: Evidence for Shear‐driven Turbulence in the Interstellar Medium | Zendy

T. N. Larosa | Zendy; S. N. Shore | Zendy; Loris Magnani | Zendy

Open Access

A Dynamical Study of the Non–Star‐forming Translucent Molecular Cloud MBM 16: Evidence for Shear‐driven Turbulence in the Interstellar Medium

Author(s) -

T. N. Larosa,

S. N. Shore,

Loris Magnani

Publication year - 1999

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/306802

Subject(s) - turbulence , molecular cloud , physics , dissipation , turbulence kinetic energy , cloud computing , kinetic energy , star formation , astrophysics , shear (geology) , shear flow , interstellar medium , mechanics , classical mechanics , galaxy , materials science , thermodynamics , stars , computer science , operating system , composite material

We present the results of a velocity correlation study of the high latitudecloud MBM16 using a fully sampled $^{12}$CO map, supplemented by new $^{13}$COdata. We find a correlation length of 0.4 pc. This is similar in size to theformaldehyde clumps described in our previous study. We associate thiscorrelated motion with coherent structures within the turbulent flow. Suchstructures are generated by free shear flows. Their presence in this non-starforming cloud indicates that kinetic energy is being supplied to the internalturbulence by an external shear flow. Such large scale driving over long timesis a possible solution to the dissipation problem for molecular cloudturbulence.Comment: Uses AAS aasms4.sty macros. Accepted for publication in Ap

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