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Un estallido de rayos gamma con un desplazamiento al rojo de z de aproximadamente 8,2
N R Tanvir1, D B Fox, A J Levan
1Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK. nrt3@star.le.ac.uk
Nature
|October 30, 2009
Resumen
Los astrónomos detectaron explosiones de rayos gamma (GRB) de estrellas masivas que explotaron solo 630 millones de años después del Big Bang. Este descubrimiento empuja el universo observable hacia adelante.
Área de la Ciencia:
- La astronomía es la astronomía.
- Cosmología Cosmología.
- La astrofísica es la astrofísica.
Sus antecedentes:
- Las explosiones de rayos gamma de larga duración (GRB) se originan en las muertes explosivas de estrellas masivas.
- El récord anterior de desplazamiento al rojo más alto para un objeto fue z = 6.96 (galaxia emisora Lyman-alfa).
Objetivo del estudio:
- Informar de la detección de un estallido de rayos gamma (GRB, por sus siglas en inglés) con un desplazamiento al rojo significativamente mayor que el observado anteriormente.
- Para investigar la formación temprana de estrellas y la muerte estelar en el universo.
Principales métodos:
- Observación del GRB 090423.3 fue realizada.
- Medición del corrimiento al rojo utilizando tecnología astronómica avanzada.
Principales resultados:
- GRB 090423 se detectó en un corrimiento al rojo de aproximadamente z = 8.2.2.
- Esto indica que la formación de estrellas masivas y la muerte ocurrieron alrededor de 630 millones de años después del Big Bang.
- La ubicación del GRB permitió identificar con precisión su galaxia anfitriona.
Conclusiones:
- Las estrellas masivas y los GRB existían mucho antes en el universo de lo que se había confirmado anteriormente.
- Los GRB son herramientas valiosas para sondear el universo temprano e identificar galaxias tempranas.
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