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Published on: July 1, 2019
Un gran exceso de opacidad solar aparente debido al magnetismo de la superficie
Martin D Fivian1, Hugh S Hudson, Robert P Lin
1Space Sciences Laboratory, University of California-Berkeley, Berkeley, CA 94720, USA. mfivian@ssl.berkeley.edu
Resumen
El Sol es el Sol.
Área de la Ciencia:
- Física solar Física solar es la física de la energía solar.
- La astronomía es la astronomía.
- Heliofísica es la heliofísica.
Sus antecedentes:
- La forma del Sol está influenciada por su rotación y su dinámica interna.
- La rotación de la superficie predice un plano solar específico (diferencia de radio entre el ecuador y el polo).
- Observaciones anteriores sugirieron una discrepancia entre el predito y el observado.
Objetivo del estudio:
- Para investigar la discrepancia en la opacidad del Sol.
- Identificar y corregir los errores sistemáticos en las mediciones de la opacidad.
- Para determinar la opacidad del Sol en ausencia de efectos magnéticos.
Principales métodos:
- Se utilizaron datos del satélite Reuven Ramaty High-Energy Solar Spectroscopic Imager (RHESSI) para obtener imágenes de energía solar.
- Analizó la correlación entre la posición de las extremidades solares y el brillo ultravioleta extremo (UVE).
- Se corrigieron las mediciones de flatitud tomando en cuenta los elementos magnéticos en la red solar.
Principales resultados:
- La opacidad solar observada fue más alta de lo previsto solo por la rotación de la superficie.
- Se encontró una fuerte correlación entre el brillo de las extremidades y los valores de radio más grandes, vinculados a la actividad magnética.
- La opacidad corregida para el Sol no magnético fue de 8,01 +/- 0,14 milisegundos de arco.
Conclusiones:
- El exceso de plano observado se debe en gran medida a las influencias magnéticas.
- Después de la corrección de los efectos magnéticos, la opacidad del Sol se alinea con las predicciones de su rotación.
- Este estudio refina nuestra comprensión de la forma solar y su relación con los procesos internos y los campos magnéticos.
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