Change search
ReferencesLink to record
Permanent link

Direct link
The magnetic field of ε Eri
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
2013 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

The magnetic eld of the star, ε Eri, is investigated. It is a nearbyK2V star. Previous studies have shown indications of a magnetic eld,but no measurements have been done with polarization. The Zeemaneect causes the lines in the spectrum to be split. The light also becomespolarized. By looking at the circular polarization, we can get informationabout the longitudinal magnetic eld.We study the polarization proles in the high-resolution spectra of εEri, to increase the S/N ratio, the LSD method is used. By combiningmany lines in the spectra, the shape of the averaged line can be derived.Using this approach, we obtain Stokes I, V, and the null spectra. Theyare then compared. From these, the mean longitudinal magnetic eld iscalculated. Data from two separate observing runs are compared: Onefrom 2010 and the other from 2011. Based on this analysis we nd a largereduction of magnetic eld strength of ε Eri in just one year.

Place, publisher, year, edition, pages
2013. , 22 p.
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-201519OAI: diva2:627839
Educational program
Bachelor Programme in Physics
Physics, Chemistry, Mathematics
Available from: 2013-06-18 Created: 2013-06-12 Last updated: 2013-06-18Bibliographically approved

Open Access in DiVA

The magnetic field of epsilon Eri(1152 kB)177 downloads
File information
File name FULLTEXT02.pdfFile size 1152 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
Department of Physics and Astronomy
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 177 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 209 hits
ReferencesLink to record
Permanent link

Direct link