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Una imagen de rayos X con resolución espacial de una estrella como el Sol
Science (New York, N.Y.)
|October 8, 1993
Resumen
Las observaciones satelitales de rayos X revelaron la primera imagen con resolución espacial de una estrella similar al Sol.
Área de la Ciencia:
- * Astrofísica es la astrofísica.
- * Las Coronas Estelares.
- * Astronomía de rayos X en el campo de los rayos X.
Sus antecedentes:
- * Alpha Coronae Borealis (CrB) es un sistema binario eclipsante con los tipos espectrales A0V y G5V.
- * Estudios previos carecían de información espacial detallada sobre las coronas estelares.
Objetivo del estudio:
- * Generar la primera imagen de rayos X con resolución espacial de una corona estelar.
- * Para investigar la distribución de la emisión de rayos X en la superficie de la estrella compañera de tipo G.
Principales métodos:
- * Se utilizaron datos del observatorio de rayos X del satélite Roentgen (ROSAT).
- * Analizó la curva de luz de rayos X durante el mínimo secundario del binario eclipsante.
- * Se empleó la optimización de recocido simulado para el mapeo de eclipses.
Principales resultados:
- * La estrella A0V es oscura en rayos X; la emisión se origina únicamente en la compañera G5V.
- * Se observaron entradas y salidas altamente asimétricas en la curva de luz de rayos X.
- * Construyó un mapa de eclipse detallando la distribución asimétrica de la intensidad de los rayos X en la estrella G.
Conclusiones:
- * El estudio proporciona una resolución espacial sin precedentes de una corona estelar.
- * La estrella de tipo G exhibe una no uniformidad significativa en su brillo superficial de rayos X.
- * Este método permite el mapeo detallado de las regiones activas en las estrellas.
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