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dc.contributor.authorDrews, Ainar
dc.date.accessioned2015-02-12T23:01:10Z
dc.date.available2015-02-12T23:01:10Z
dc.date.issued2014
dc.identifier.citationDrews, Ainar. Chromospheric Microjets in the Penumbra of a Sunspot. Master thesis, University of Oslo, 2014
dc.identifier.urihttp://hdl.handle.net/10852/42243
dc.description.abstractIn 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.isoeng
dc.subjectThe
dc.subjectSun
dc.subjectchromospheric
dc.subjectmicrojets
dc.subjectautomated
dc.subjectdetections
dc.subjectsunspot
dc.titleChromospheric Microjets in the Penumbra of a Sunspoteng
dc.typeMaster thesis
dc.date.updated2015-02-12T23:01:10Z
dc.creator.authorDrews, Ainar
dc.identifier.urnURN:NBN:no-46622
dc.type.documentMasteroppgave
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/42243/7/master.pdf


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