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El Sol es menos activo que otras estrellas similares al Sol
Timo Reinhold1, Alexander I Shapiro2, Sami K Solanki2,3
1Max-Planck-Institut für Sonnensystemforschung, 37077 Göttingen, Germany. reinhold@mps.mpg.de.
Resumen
El Sol
Área de la Ciencia:
- Astrofísica estelar y heliofísica.
- Actividad estelar comparativa y ciclos magnéticos.
Sus antecedentes:
- Las estrellas exhiben variaciones de brillo debido a la actividad magnética.
- Comprender la variabilidad solar requiere una comparación con estrellas similares al Sol.
Objetivo del estudio:
- Para evaluar la tipicidad de la variabilidad magnética del Sol entre las estrellas similares al Sol.
- Para comparar la variabilidad fotométrica del Sol con la de 369 estrellas similares al Sol.
Principales métodos:
- Utilizó 4 años de datos fotométricos del telescopio espacial Kepler.
- Datos astrométricos integrados de la nave espacial Gaia.
- Variabilidad fotométrica medida para 369 estrellas similares al Sol con propiedades cercanas al Sol.
Principales resultados:
- La mayoría de las estrellas similares al Sol analizadas exhiben una mayor variabilidad que el Sol.
- Estas estrellas altamente variables son considerablemente más activas magnéticamente que el Sol.
- Las estrellas parecían visualmente similares al Sol, diferenciándose principalmente en los niveles de actividad.
Conclusiones:
- El nivel de actividad actual del Sol puede no ser su norma histórica.
- El Sol podría experimentar épocas futuras de actividad magnética y variabilidad significativamente más altas.
- Se necesita más investigación para comprender el potencial del Sol para estados de alta actividad.
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