Probing Turbulence in the Interstellar Medium of Galaxies

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dc.creatorDutta, Prasun
dc.creatorBegum, Ayesha
dc.creatorBharadwaj, Somnath
dc.creatorChengalur, Jayaram N.
dc.date2009-05-21
dc.date.accessioned2026-07-07T13:17:07Z
dc.date.available2026-07-07T13:17:07Z
dc.descriptionThe power spectrum of HI intensity fluctuation of the interstellar medium carries information of the turbulence dynamics therein. We present a method to estimate the power spectrum of HI 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 galaxies and 5 dwarf galaxies. The measured power spectrum seem to follow a power law P_HI(U) = A U^α, 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.
dc.description5 pages, 1 figure
dc.identifierhttps://arxiv.org/abs/0905.3437
dc.identifierhttp://arxiv.org/abs/0905.3437
dc.identifierThe Low-Frequency Radio Universe, ASP Conference Series, Vol. LFRU, 2009
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/231009
dc.subjectAstrophysics of Galaxies
dc.subjectCosmology and Nongalactic Astrophysics
dc.titleProbing Turbulence in the Interstellar Medium of Galaxies
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