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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 559319.0, MPI für Astronomie / Publikationen_mpia
Tracing turbulent ambipolar diffusion in molecular clouds
Authors:Li, Hua-bai; Houde, Martin; Lai, Shih-ping; Sridharan, T. K.
Language:English
Date of Publication (YYYY-MM-DD):2010
Title of Journal:The Astrophysical Journal
Journal Abbrev.:ApJ
Volume:718
Issue / Number:2
Start Page:905
End Page:912
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Though flux freezing is a good approximation frequently assumed for molecular clouds, ambipolar diffusion (AD) is inevitable at certain scales. The scale at which AD sets in can be a crucial parameter for turbulence and the star formation process. However, both observation and simulation of AD are very challenging and our knowledge of it is very limited. We recently proposed that the difference between ion and neutral velocity spectra is a signature of turbulent AD and can be used to estimate the AD scales and magnetic field strengths. Here, we present observational evidence showing that this difference between the velocity dispersions from coexistent ions and neutrals is indeed correlated with magnetic field strength.
Free Keywords:ISM: clouds; ISM: kinematics and dynamics; ISM: magnetic fields; turbulence
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2010ApJ...718..905L [ID No:1]
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