Magnetic absorption lines in stellar spectra |
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| Authors: | L Semionova Jorge PÁez J Bonatti |
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| Institution: | (1) Departamento de Física, Universidad Nacional, Heredia, Costa Rica;(2) Grupo de Astrofísica Teórica, Escuela de Física, Universidad de Costa Rica, San Pedro, Costa Rica |
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| Abstract: | 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 1012-1013 Gauss, which are common values in modelling pulsars.Analyzing the first absorption lines (N = 0 toN  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 toN = 1) the dominant polarization of the photon is. For the next two transition lines (N = 0 toN = 2 andN = 0 toN = 3), the polarization is. 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
=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 some known pulsar spectra and we determine which transition feature corresponds in their spectra.Presented at the 2nd UN/ESA Workshop, held in Bogotá, Colombia, 9-13 November, 1992. |
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