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Paper: Probing Turbulence in the Interstellar Medium of Galaxies
Volume: 407, The Low-Frequency Radio Universe
Page: 83
Authors: Dutta, P.; Begum, A.; Bharadwaj, S.; Chengalur, J.N.
Abstract: The power spectrum of HΙ intensity fluctuation of the interstellar medium carries information of the turbulence dynamics therein. We present a method to estimate the power spectrum of HΙ intensity fluctuation using radio interferometric observations. The method involves correlating the visibilities in the u−v plane at different baselines. This method is particularly use full for evaluating the power spectrum for the faint dwarf galaxies. We apply this method to 3 spiral and 5 dwarf galaxies. The measured power spectrum is seem to follow a power law PHΙ(U) = AUα, suggesting turbulence to be operational. Further, depending on the slope of the power spectrum, we expect the presence of 2D and 3D turbulence in those galaxies.
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