Computer Science – Numerical Analysis
Scientific paper
Nov 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...291..668c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 291, no. 2, p. 668-678
Computer Science
Numerical Analysis
32
Electric Fields, Electric Moments, H Alpha Line, Magnetic Fields, Polarized Radiation, Radiative Transfer, Hamiltonian Functions, Numerical Analysis, Polarization (Waves)
Scientific paper
In this article, we investigate some noteworthy properties of the first-order moments of the polarization profiles of hydrogen lines in the presence of external electric and magnetic fields. These properties are useful in testing the applicability of the centers-of-gravity method for the estimate of magnetic fields, whenever electric fields are also present. A criticism is also raised about the effective Lande factor in hydrogen lines as previously calculated by different authors. In addition, we achieve a better insight into the problem of the numerical precision of the software package which has been developed for the calculation of the polarization properties of hydrogen lines, a problem already approached in a previous paper.
Casini Roberto
Landi Degl'Innocenti Egidio
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