Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010hia....15..442f&link_type=abstract
Highlights of Astronomy, Volume 15, p. 442-443
Astronomy and Astrophysics
Astronomy
Turbulence, Mhd, Ism:Magnetic Fields, Ism: Kinematics And Dynamics, Ism: Structure, Ism: Evolution
Scientific paper
Regions of intense velocity-shears are identified on statistical grounds in nearby diffuse molecular gas: they form conspicuous thin (~ 0.03 pc) and parsec-long structures that do not bear the signatures of shocked gas. Several straight substructures, ~ 3 mpc thick, have been detected at different position-angles within one of them. Two exhibit the largest velocity-shears ever measured far from star forming regions, up to 780 kms-1pc-1. Their position-angles are found to be also those of 10-parsec striations in the I(100μm) dust emission of the large scale environment. The B field projections, where available in these fields, are parallel both to the parsec- and to one of the milliparsec-scale shears. These findings put in relation the small-scale intermittent facet of the gas velocity field and the large scale structure of the magnetic fields.
Falgarone Edith
Hily-Blant Pierre
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