Bibcode
Asensio Ramos, A.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 563, id.A114, 9 pp.
Fecha de publicación:
3
2014
Revista
Número de citas
3
Número de citas referidas
3
Descripción
A multiline Bayesian analysis of the Zeeman broadening in the solar
atmosphere is presented. A hierarchical probabilistic model, based on
the simple but realistic Milne-Eddington approximation to the solution
of the radiative transfer equation is used to explain the data in the
optical and near infrared. Our method makes use of the full line
profiles of more than 500 spectral lines from 4000 Å to 1.8 μm.
Although the problem suffers from a strong degeneracy between the
magnetic broadening and any other remaining broadening mechanism, the
hierarchical model allows the magnetic contribution to be isolated with
reliability. We obtain the cumulative distribution function for the
field strength and use it to put reliable upper limits on the unresolved
magnetic field strength in the solar atmosphere. The field is below
160-180 G with a 90% probability.
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