Volume 389, Number 3, July III 2002
|Page(s)||1055 - 1067|
|Published online||01 July 2002|
Interstellar turbulent velocity fields: Scaling properties, synthesis and effects on chemistry*
LUTH, Observatoire de Paris et Université Paris 7, France
Corresponding author: J. Le Bourlot, Jacques.firstname.lastname@example.org
Accepted: 3 April 2002
Turbulence is thought to play a key role in the dynamics of interstellar clouds. Here, we do not seek to explain its origin or decipher the mechanisms that maintain it, but we start from the observational fact that it is present. Arnéodo et al. have developped a method based on wavelet analysis to study incompressible turbulence experiments. We propose to use this method with the same propagator to derive quantitative information on the structure of a turbulent field. Then we build a synthetic velocity field with the same statistical properties and we show that a reactive fluid subject to turbulent forcing exhibits self-organised structures that depend on the chemical species considered. Such effects could explain why observational evidence shows that the bulk of the mass is distributed smoothly whereas some chemical species are extremely patchy.
Key words: turbulence / methods: numerical / ISM: general / ISM: molecules / ISM: structure
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.