Bennebroek Evertsz', Florian J (2020) The effect of hydrodynamical shielding and magnetic draping on the survival of High-Velocity Clouds. Bachelor's Thesis, Astronomy.
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Abstract
In this report the survival times of high-velocity clouds in the galactic halo are estimated for clouds subject to different protective mechanisms. Using the PLUTO code, 4 different simulations are run of clouds travelling through the halo. The first simulation consists of a single cold cloud travelling through a hot medium (representing the galactic halo). The second simulation shows three clouds of the same size travelling through the halo, in this situation the lifetime of the second and third cloud improves due to the shielding effect of the first cloud. The third simulation displays a single cloud moving through the halo similarly to the first simulation but in this case a magnetic field component is added perpendicular to the motion of the cloud. This increases the survival time of the cloud greatly. The final simulation combines the shielding effect of multiple clouds and the magnetic field. The destruction of the clouds is quantified and compared by determining the fraction of the cloud material that mixes with the hot gas at different times. I find the magnetic field to have the biggest influence on the clouds survival while the addition of other clouds provided less protection.
| Item Type: | Thesis (Bachelor's Thesis) |
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| Supervisor name: | Fraternali, F. |
| Degree programme: | Astronomy |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 06 Oct 2020 12:02 |
| Last Modified: | 06 Oct 2020 12:02 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/23467 |
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