Photospheric Hanle diagnostic of weak magnetic dipoles in stars

Bibcode
2011A&A...527A.120L
DOI
10.1051/0004-6361/201015388
López Ariste, A.; Asensio-Ramos, A.; González Fernández, C.
Referencia bibliográfica

Astronomy and Astrophysics, Volume 527, id.A120

Fecha de publicación:
3
2011
Revista
Astronomy and Astrophysics
Número de autores
3
Número de autores del IAC
1
Número de citas
13
Número de citas referidas
10
Descripción
Aims: We propose and explore a new diagnostic technique based upon the linear polarization emitted in Hanle-sensitive lines in disk-integrated stars where a dipolar magnetic field breaks the rotational symmetry of the resonance scattering polarization Methods: A star with a simple dipolar field and a 1-0 spectral line were used to compute polarization amplitudes and angles. Results: Predicted amplitudes are low but within reach of present instruments Conclusions: A new application of the Hanle effect is proposed and analyzed as a tool that allows measuring of some of the weakest stellar magnetic fields.
Proyectos relacionados
Erupción solar
Simulación Numérica de Procesos Astrofísicos
La simulación numérica mediante códigos complejos de ordenador es una herramienta fundamental en la investigación física y en la técnica desde hace décadas. El crecimiento vertiginoso de las capacidades informáticas junto con el avance notable de la matemática numérica ha hecho accesible a los centros de investigación de tamaño medio
Daniel Elías
Nóbrega Siverio
En ejecución
Project Image
Magnetismo, Polarización y Transferencia Radiativa en Astrofísica
Los campos magnéticos están presentes en todos los plasmas astrofísicos y controlan la mayor parte de la variabilidad que se observa en el Universo a escalas temporales intermedias. Se encuentran en estrellas, a lo largo de todo el diagrama de Hertzsprung-Russell, en galaxias, e incluso quizás en el medio intergaláctico. La polarización de la luz
Ernest
Alsina Ballester
En ejecución
Tipo
Con árbitro
Física Solar (FS)
Técnicas
Métodos

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