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Generación de campos magnéticos de semillas protogalácticas a escala en ondas de choque producidas por láser
G Gregori1, A Ravasio, C D Murphy
1Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK. g.gregori1@physics.ox.ac.uk
Nature
|January 28, 2012
Resumen
El proceso de la batería de Biermann genera campos magnéticos semilla en las primeras galaxias. Los experimentos de laboratorio muestran que estos campos pueden ser amplificados por la turbulencia, influyendo en la evolución de la galaxia en escalas de tiempo cósmicas.
Área de la Ciencia:
- La astrofísica es la astrofísica.
- Física del plasma es la física del plasma.
Sus antecedentes:
- Los campos magnéticos galácticos son cruciales para la evolución de las galaxias.
- El proceso de batería de Biermann es un candidato líder para la generación de campos magnéticos primordiales.
Objetivo del estudio:
- Para investigar experimentalmente el efecto de la batería de Biermann.
- Para determinar la escalabilidad de campos magnéticos de semillas generados en laboratorio a entornos astrofísicos.
Principales métodos:
- Utilizando sistemas láser de alta potencia para simular las condiciones astrofísicas.
- Reproducción de geometrías de choque asociadas con el colapso de la estructura protogaláctica.
- Medición de la generación de campos magnéticos de las semillas a través del efecto de la batería de Biermann.
Principales resultados:
- Generó con éxito campos magnéticos de semillas utilizando el efecto de la batería de Biermann en un entorno de laboratorio.
- Demostró que estos campos de siembra pueden ser amplificados por la turbulencia.
- Los resultados experimentales mostrados son escalables al medio intergaláctico.
Conclusiones:
- La batería de Biermann es un mecanismo viable para generar campos magnéticos de semilla en el universo temprano.
- La turbulencia puede amplificar estos campos de semillas durante ~700 millones de años, impactando la evolución de la galaxia.
- La astrofísica de laboratorio proporciona valiosos conocimientos sobre los orígenes del campo magnético cósmico.
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