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Plasma caliente y binarios de agujeros negros en la galaxia de explosión estelar M82
R E Griffiths1, A Ptak, E D Feigelson
1Department of Physics, Wean Hall, Carnegie Mellon University, Pittsburgh, PA 15213-3890, USA. griffith@astro.phys.cmu.edu
Science (New York, N.Y.)
|November 18, 2000
Resumen
Los datos del Observatorio de Rayos X Chandra revelan que Messier 82 (M82) tiene un plasma extremadamente caliente, impulsado por supernovas, que alimenta un viento galáctico. Este estudio identifica fuentes compactas de rayos X, potencialmente sistemas de agujeros negros.
Área de la Ciencia:
- * Astrofísica es la astrofísica.
- * Astrofísica de alta energía.
- * La evolución de las galaxias.
Sus antecedentes:
- * Messier 82 (M82) es un prototipo de galaxia de estallido estelar, conocida por su intensa formación estelar.
- * El medio interestelar (ISM) en la Vía Láctea es típicamente de 1 a 2 millones de Kelvin.
- * Las explosiones de supernovas son los principales impulsores de los fenómenos galácticos.
Objetivo del estudio:
- * Para investigar el plasma caliente y los procesos energéticos en M82 utilizando observaciones de rayos X de alta resolución.
- * Para caracterizar la temperatura y la distribución del plasma en el núcleo de M82.
- * Para identificar y analizar fuentes compactas de rayos X dentro de M82.2.
Principales métodos:
- * Utilizó el avanzado espectrómetro de imágenes CCD del Observatorio de Rayos X Chandra.
- * Realizó observaciones de rayos X de alta resolución de M82.2.
- * Se analizaron datos espectrales para determinar la temperatura del plasma e identificar fuentes de rayos X.
Principales resultados:
- * Plasma descubierto con una temperatura de aproximadamente 40.000.000 Kelvin que llena el kiloparsec interno de 1 de M82.
- * Este plasma es significativamente más caliente que el ISM de la Vía Láctea.
- * Se resolvieron aproximadamente 20 fuentes compactas de rayos X, con muchas sospechas de ser binarias de rayos X de alta masa, que posiblemente contienen agujeros negros.
- * Identificó la región central como sobrepresurizada, impulsando el viento galáctico de M82.
Conclusiones:
- * Las explosiones de supernovas en el núcleo de M82 generan plasma extremadamente caliente y sobrepresurizado.
- * Este plasma alimenta un poderoso viento galáctico que se extiende hasta el medio intergaláctico.
- * M82 alberga numerosas fuentes compactas de rayos X, lo que indica poblaciones binarias de rayos X de alta masa activas, incluidos los candidatos a agujero negro.
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