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Updated: Apr 13, 2026
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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
Published on: August 25, 2016
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Emisión extendida de rayos X duros en los pocos parsecs internos de la Galaxia
Kerstin Perez1, Charles J Hailey2, Franz E Bauer3
11] Columbia Astrophysics Laboratory, Columbia University, 550 West 120th Street, Room 1027, New York, New York 10027, USA [2] Haverford College, 370 Lancaster Avenue, KINSC L109, Haverford, Pennsylvania 19041, USA.
Nature
|May 1, 2015
Resumen
Los astrónomos descubrieron una distinta emisión de rayos X duros en el centro galáctico. Este hallazgo desafía los modelos actuales de evolución estelar y producción de rayos cósmicos cerca de Sagitario A*.
Área de la Ciencia:
- La astrofísica es la astrofísica.
- Astronomía de alta energía Astronomía de alta energía
- Estudios del Centro Galáctico de Estudios.
Sus antecedentes:
- El Centro Galáctico contiene una desconcertante población de estrellas jóvenes y masivas cerca de Sagitario A*.
- Estudios previos identificaron fuentes blandas de rayos X como primordialmente enanas blancas en acrecentamiento.
- Las observaciones de la emisión difusa de rayos X duros estaban limitadas por la resolución del instrumento.
Objetivo del estudio:
- Para investigar la emisión de rayos X duros en el centro galáctico interior con una resolución espacial mejorada.
- Para caracterizar la naturaleza y el origen de este componente de rayos X duro.
Principales métodos:
- Utilizó imágenes de resolución subbarcminute en el rango de energía de 20-40 kiloelectronvoltios.
- Se analizó la difusa emisión de rayos X duros dentro de los parsecs centrales de 4 × 8 del Centro Galáctico.
Principales resultados:
- Se informó de la presencia de un componente de rayos X duro distinto en el parsec central de 4 × 8.
- Se observó que esta emisión de rayos X duros tiene un pico más agudo hacia el Centro Galáctico que las fuentes de rayos X blandos.
Conclusiones:
- Los hallazgos sugieren posibilidades que incluyen una población más masiva de enanas blancas en acrecentamiento, binarios de rayos X de baja masa, púlsares de milisegundos o salidas de partículas.
- Estas interpretaciones presentan desafíos significativos a las teorías existentes de la evolución estelar, la formación binaria y la producción de rayos cósmicos en el Centro Galáctico.
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