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El origen de la emisión de rayos X duros desde el plano galáctico
1Code 662, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA. ebisawa@gsfc.nasa.gov
Science (New York, N.Y.)
|August 11, 2001
Resumen
El plano galáctico es el plano galáctico.
Área de la Ciencia:
- La astronomía es la astronomía.
- La astrofísica es la astrofísica.
- Astronomía de rayos X La astronomía de rayos X es una ciencia.
Sus antecedentes:
- El plano galáctico exhibe una fuerte emisión de rayos X duros que forman una cresta continua.
- Las fuentes conocidas de rayos X son insuficientes para explicar esta emisión de cresta.
- La naturaleza de la emisión (fuentes discretas vs. difusas) sigue sin resolverse.
Objetivo del estudio:
- Para determinar si la emisión de rayos X duros del plano galáctico se origina en fuentes discretas o es difusa.
- Para llevar a cabo el estudio de rayos X más profundo de una región del plano galáctico que carece de fuentes conocidas.
Principales métodos:
- Utilizó el Observatorio de rayos X Chandra para un estudio de rayos X duro y profundo.
- Centrado en una región de 17' por 17' del plano galáctico carente de fuentes puntuales de rayos X conocidas.
Principales resultados:
- Se detectaron al menos 36 nuevas fuentes puntuales de rayos X duros y fuertes emisiones difusas.
- La densidad de la superficie de la fuente puntual es comparable a las altas latitudes galácticas, lo que sugiere orígenes extragalácticos.
- La emisión difusa indica la presencia de un plasma caliente en el plano galáctico.
Conclusiones:
- La dura emisión de rayos X de la cresta galáctica es predominantemente difusa.
- Esta emisión difusa significa un plasma caliente omnipresente dentro del plano galáctico.
- La densidad de energía del plasma es significativamente mayor que la de otras sustancias interestelares.
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