Eissa, Ismail (2022) Radio Jets in Young Stellar Objects Studying their physical parameters to differentiate between thermal and non-thermal jets. Bachelor's Thesis, Astronomy.
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Abstract
Jets of young stellar objects have shown to be either thermal jets associated with free-free emission or non-thermal jets as a result of synchrotron emission. Our goal is to differentiate between thermal and non-thermal jets by looking for trends through their protostellar physical parameters. We use radio continuum observations of the Karl G. Jansky Very Large Array done by Gould’s Belt Survey to study the spectral indices and flux densities of 706 young stellar objects in the Orion and Taurus- Auriga regions. We also compare our findings with literature values for the magnetic field strength in order to understand the environment of the jets. We find that non-thermal jets have a stronger magnetic field reaching values up to 10−1 G, two orders of magnitude higher than thermal jets. Mass-loss rates acquired in the outflows shows a linear trend for the optically thick jets linked with free-free emission while non-thermal jets mass outflow do not vary much. The magnetic field in non-thermal jets is powerful enough to deny any instabilities that might affect the mass-loss rate.
| Item Type: | Thesis (Bachelor's Thesis) |
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| Supervisor name: | Tak, F.F.S. van der |
| Degree programme: | Astronomy |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 15 Jul 2022 12:52 |
| Last Modified: | 15 Jul 2022 12:52 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/27919 |
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