dc.contributor.author | Drews, Ainar | |
dc.date.accessioned | 2015-02-12T23:01:10Z | |
dc.date.available | 2015-02-12T23:01:10Z | |
dc.date.issued | 2014 | |
dc.identifier.citation | Drews, Ainar. Chromospheric Microjets in the Penumbra of a Sunspot. Master thesis, University of Oslo, 2014 | |
dc.identifier.uri | http://hdl.handle.net/10852/42243 | |
dc.description.abstract | In this thesis chromospheric features called Penumbral Microjets (PMJs) are investigated in a sunspot. Observations of high resolution in space, time and wavelength from the Swedish 1-meter Solar Telescope (SST) are used to probe the Ca II 8542 Å-line. The goal is to obtain detailed spectral signatures of PMJs in the Ca II 8542 Å -line, as well as basic statistical measures such as lifetime and sizes. This is achieved by the implementation of an automated detection scheme employing dimensionality reduction methods and a simple learning algorithm which together reduce and classify the observations from the SST. The advantages of employing an automated numerical detection scheme are exploited to assemble a large sample of objects and extract statistically significant results from it. The obtained statistical values and spectra are then discussed and put in a wider context. | eng |
dc.language.iso | eng | |
dc.subject | The | |
dc.subject | Sun | |
dc.subject | chromospheric | |
dc.subject | microjets | |
dc.subject | automated | |
dc.subject | detections | |
dc.subject | sunspot | |
dc.title | Chromospheric Microjets in the Penumbra of a Sunspot | eng |
dc.type | Master thesis | |
dc.date.updated | 2015-02-12T23:01:10Z | |
dc.creator.author | Drews, Ainar | |
dc.identifier.urn | URN:NBN:no-46622 | |
dc.type.document | Masteroppgave | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/42243/7/master.pdf | |