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Nubes discretas de gas neutro entre las galaxias M31 y M33
Spencer A Wolfe1, D J Pisano, Felix J Lockman
1Department of Physics, West Virginia University, PO Box 6315, Morgantown, West Virginia 26506, USA. swolfe4@mix.wvu.edu
Nature
|May 10, 2013
Resumen
Las galaxias espirales necesitan gas para la formación de estrellas. Nuevas observaciones de radio revelan nubes de gas intergaláctico cerca de M31 y M33, lo que sugiere una fuente potencial de combustible para la futura formación de estrellas en estas galaxias.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Dinámica de los gases cósmicos Dinámica de los gases cósmicos
Sus antecedentes:
- Las galaxias espirales requieren una continua acreción de gas para sostener la formación estelar.
- El estado y la distribución del gas intergaláctico, una fuente potencial de combustible, siguen siendo poco conocidos.
- Observaciones de radio anteriores detectaron gas hidrógeno entre M31 y M33, posiblemente un filamento intergaláctico.
Objetivo del estudio:
- Para investigar la naturaleza y el origen del gas intergaláctico observado entre M31 y M33.
- Para determinar si este gas puede servir como fuente de combustible para la futura formación de estrellas en las galaxias del Grupo Local.
Principales métodos:
- Utilizó observaciones de radio avanzadas para estudiar el gas intergaláctico.
- Analizó la distribución y la velocidad de los componentes del gas (nubes vs. difuso).
Principales resultados:
- El gas intergaláctico está compuesto por aproximadamente un 50% de nubes y un 50% de componentes difusos.
- Las nubes de gas observadas exhiben velocidades similares a las de M31 y M33.
- Las propiedades de las nubes sugieren que no están directamente vinculadas a otros objetos del Grupo Local.
Conclusiones:
- Las nubes de gas observadas son probablemente condensaciones transitorias dentro de un filamento intergaláctico.
- Este filamento representa una fuente potencial de gas para alimentar la futura formación de estrellas en M31 y M33.
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