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Consider the electric field of an oppositely charged, parallel-plate system and an imaginary box between those plates. Let the bottom face of the box be ABCD, and the top face be FGHK. The electric field between the plates is uniform and points from the positive plate toward the negative plate. The calculation of this field's flux through the box's various faces shows that the net flux through the box is zero. Why does the flux cancel out here?
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Un método basado en la física que puede predecir inminentes grandes erupciones solares

Kanya Kusano1, Tomoya Iju2, Yumi Bamba3,4

  • 1Institute for Space-Earth Environmental Research, Nagoya University, Nagoya 464-8601, Japan. kusano@nagoya-u.jp.

Science (New York, N.Y.)
|August 1, 2020
PubMed
Resumen
Este resumen es generado por máquina.

Un nuevo modelo basado en la física, el esquema κ, predice con precisión grandes erupciones solares mediante la identificación de la inestabilidad magnetohidrodinámica crítica. Este modelo utiliza la densidad de flujo de torsión magnética para determinar la ocurrencia, ubicación y tamaño de las llamaradas, mejorando el pronóstico del clima espacial.

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Área de la Ciencia:

  • * Física solar
  • * El tiempo espacial
  • * Física del plasma

Sus antecedentes:

  • * Las erupciones solares son eventos coronales energéticos que impactan el clima espacial de la Tierra.
  • * La predicción actual de las erupciones solares se basa en métodos empíricos debido a un mecanismo de inicio desconocido.
  • * La comprensión de los disparadores de llamaradas es crucial para mejorar las capacidades de pronóstico.

Objetivo del estudio:

  • * Introducir un modelo basado en la física, el esquema κ, para predecir grandes erupciones solares.
  • * Investigar el papel de la inestabilidad magnetohidrodinámica y la reconexión magnética en el inicio de las llamaradas.
  • * Para identificar los parámetros clave que determinan la aparición, la ubicación y la magnitud de las llamaradas.

Principales métodos:

  • * Desarrollo del esquema κ, un modelo predictivo basado en la física.
  • * Análisis de las erupciones solares de clase X desde 2008 hasta 2019 (Ciclo Solar 24).
  • * Examen de la densidad de flujo de torsión magnética cerca de las líneas de inversión de polaridad.

Principales resultados:

  • * El esquema κ predice con éxito las grandes erupciones solares más inminentes.
  • * Un pequeño número de llamaradas confinadas fueron excepciones a las predicciones del modelo.
  • * La densidad de flujo de torsión magnética cerca de las líneas de inversión de polaridad es un predictor clave.

Conclusiones:

  • * El esquema κ ofrece un enfoque basado en la física para la predicción de erupciones solares.
  • * La densidad de flujo de torsión magnética es un factor crítico para determinar las características de las llamaradas solares.
  • * Esta investigación hace avanzar nuestra comprensión de los mecanismos de las erupciones solares y las previsiones.