12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone

A Comparison of the THINGS HI and HERACLES CO Velocity Dispersion in Nearby Galaxies

14 Jul 2011, 12:15


Oral Presentation Track D1 - Astrophysics APSS


Mr Keoikantse Moses Mogotsi (UCT)


In this project data from The HI Nearby Galaxy Survey (THINGS) and from the HERA CO Extragalactic Line Survey (HERACLES) is being used to compare the HI (neutral hydrogen) and CO dispersions in nearby galaxies in order to see if they are related. This is important in improving star formation laws (as they currently only use HI dispersions, but stars form from molecular gas) and to better understand turbulence in galaxies. Preliminary analysis indicates that the HI has higher velocity dispersions than the CO.

Consider for a student <br> &nbsp; award (Yes / No)? Yes
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)? No
Level (Hons, MSc, <br> &nbsp; PhD, other)? MSc

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