Structures in the interstellar medium of galaxies

Prasun Dutta1,2*, Somnath Bharadwaj3, Ayesha Sinha1 and Jayaram N. Chengalur2
1IISER Bhopal, Bhopal, India
2NCRA-TIFR, Pune, India
3IIT Kharagpur, India

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Interstellar medium of spiral galaxies are seen to have scale free structures. We report measurements of power spectra of these HI structures by observing them in emission using radio interferometers. Power spectra are found to be power law indicating existence of a scale free driving process operational at these large range of length scales.

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Keywords : ISM: structures, HI — physical process: turbulence