NDLI: Non-thermal emission and magnetic fields in nearby galaxies : A low-frequency radio continuum perspective

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Non-thermal emission and magnetic fields in nearby galaxies : A low-frequency radio continuum perspective

Content Provider	Semantic Scholar
Author	Sridhar, Sarrvesh Seethapuram
Copyright Year	2018
Abstract	Magnetische velden in sterrenstelsels kunnen worden gedetecteerd en bestudeerd door de radio-emissie die wordt geproduceerd door kosmische straalelektronen in kaart te brengen terwijl ze langs de veldlijnen in het interstellaire medium versnellen. Door sterrenstelsels te observeren bij lage radiofrequenties (in het meter-golflengtestelsel), kunnen we elektromagnetische straling detecteren die wordt geproduceerd door oude elektronenpopulaties die zich kunnen voortplanten naar de verre uithoeken van de buitenwereld. Eerdere waarnemingen met lage frequentie van nabije sterrenstelsels worden echter grotendeels beperkt door hun lage gevoeligheid (niet in staat om zwakke, diffuse emissie te detecteren) en een slechte hoekresolutie (geen onderscheid tussen bronnen mogelijk). In dit proefschrift heb ik een steekproef van nabije sterrenstelsels bekeken en bestudeerd om de magnetische veldsterkte in kaart te brengen. Deze sterrenstelsels werden waargenomen met behulp van twee radiotelescopen uit Nederland (de Low Frequency Array (LOFAR) en de Westerbork Synthesis Radio Telescope) die beide een verbeterde gevoeligheid en een betere hoekresolutie bieden dan eerdere studies.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://www.rug.nl/research/portal/files/66164998/Appendices.pdf
Alternate Webpage(s)	https://www.rug.nl/research/portal/files/66164990/Chapter_3.pdf
Alternate Webpage(s)	https://www.rug.nl/research/portal/files/66164992/Chapter_4.pdf
Alternate Webpage(s)	https://www.rug.nl/research/portal/files/66164986/Chapter_1.pdf
Alternate Webpage(s)	https://www.rug.nl/research/portal/files/66164984/Title_and_contents.pdf
Alternate Webpage(s)	https://www.rug.nl/research/portal/files/66164996/Chapter_6.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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