Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ap%26ss.214...93s&link_type=abstract
Astrophysics and Space Science, Vol. 214, No. 1-2, Proceedings of the second United Nations/European Space Agency Workshop, Bogo
Astronomy and Astrophysics
Astrophysics
Absorption Spectra, Line Spectra, Pulsars, Stellar Magnetic Fields, Stellar Models, Stellar Spectra, Electron Capture, Electron Spin, Photon-Electron Interaction, Polarization Characteristics
Scientific paper
We analyze the process of absorption which is produced under conditions of strong magnetic fields in the magnetosphere of a compact stellar source. The magnitude of the magnetic field lies in the range 1012 to 1013 Gauss, which are common values in modelling pulsars. Analyzing the first absorption lines (N = 0 to N' less than or equal to 3) we arrive to the conclusions that the orientation of electron's spin does not change if it absorbs a photon. It means it maintains its orientation opposite to the external magnetic field after the absorption. For the fundamental line (N = 0 to N' = 1) the dominant polarization of the photon is epsilon+/-. For the next two transition lines (N = 0 to N' = 2 and N = 0 to N' = 3), the polarization is epsilon2. In the case that the absorption lines belong to one of the first three transition lines, then the mean photon energy can be approached with the relation k = AN'B and thus we get an error of 13.6% with respect to values obtained by the theoretical expression. Also we applied our absorption transition probabilities to some known pulsar spectra, and we determine which transition feature corresponds in their spectra.
Bonatti Javier
Páez Jorge
Semionova Luidmila
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