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Evidencia submilimétrica para el crecimiento contemporáneo de agujeros negros masivos y protuberancias de galaxias
M J Page1, J A Stevens, J P Mittaz
1Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UK. mjp@mssl.ucl.ac.uk
Science (New York, N.Y.)
|November 3, 2001
Resumen
Los agujeros negros masivos y las protuberancias de galaxias crecen juntos. Las explosiones estelares del universo temprano probablemente formaron la mayoría de las estrellas simultáneamente con el crecimiento del agujero negro, lo que explica las poblaciones de agujeros negros cósmicos.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Evolución cósmica de la evolución cósmica.
- Formación de galaxias Formación de galaxias
Sus antecedentes:
- Existe una correlación conocida entre la masa del agujero negro y la masa del bulto estelar en galaxias cercanas.
- Esto sugiere una relación co-evolucionaria entre los agujeros negros supermasivos y sus galaxias anfitrionas esferoides.
- Los núcleos galácticos activos (AGN) son cruciales para comprender la evolución de las galaxias y el crecimiento de los agujeros negros.
Objetivo del estudio:
- Para investigar la línea de tiempo de formación de agujeros negros masivos y protuberancias de galaxias.
- Para probar la hipótesis de que la actividad de estallido estelar está vinculada a la acreción temprana de agujeros negros.
- Para sondear la historia de formación de estrellas del universo temprano en AGN radio silencioso.
Principales métodos:
- Se realizó una fotometría submilimétrica en ocho núcleos galácticos activos absorbidos por rayos X.
- Las observaciones se centraron en fuentes con luminosidades y desplazamientos al rojo característicos de la luminosidad de alta acreción.
- El análisis de los datos se centró en la detección de emisiones de 850 micrómetros para inferir la formación de polvo y estrellas.
Principales resultados:
- Se detectaron cuatro fuentes de alto corrimiento al rojo a 850 micrómetros, exhibiendo densidades de flujo entre 5,9 y 10,1 millijanskies.
- Estas fuentes detectadas se clasifican como galaxias infrarrojas ultraluminosas (ULIRG).
- La tasa de detección varía con el corrimiento al rojo, lo que sugiere una época temprana de formación estelar.
Conclusiones:
- Los hallazgos apoyan la idea de que la formación estelar significativa en esferoides ocurrió simultáneamente con la mayor acumulación de agujeros negros.
- Esta época de coformación podría explicar la distribución observada de agujeros negros masivos en el universo local.
- Los resultados indican una época común de formación estelar temprana tanto para las galaxias radioquietas como para las radiogalaxias.
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