The presence of interstellar turbulence could explain the velocity flattening in galaxies

Details The presence of interstellar turbulence could explain the velocity flattening in galaxies The presence of interstellar turbulence could explain the velocity flattening in galaxies

2010-12-07

arxiv.org/abs/1012.1384v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

10 pqges, 4 figures

Scientific paper

Expanding our previous work on turbulent whirls [1] we have uncovered a similarity within the similarity shared by intense vortices. Using the new information we compress the tangential velocity profiles of a diverse set of vortices into one and thus identify those that belong to the same genus. Examining the Laser Doppler Anemometer (LDA) results of mechanically produced vortices and radar data of several tropical cyclones, we find that the uplift and flattening effect of tangential velocity is a consequence of turbulence. Reasoning by analogy we conclude that turbulence in the interstellar medium could indeed introduce a flattening effect in the galactic rotation curves.

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