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La formación de estrellas dentro de una salida galáctica

R Maiolino1,2, H R Russell3, A C Fabian3

  • 1Cavendish Laboratory, University of Cambridge, 19 J. J. Thomson Avenue, Cambridge CB3 0HE, UK.

Nature
|March 28, 2017
PubMed
Resumen
Este resumen es generado por máquina.

Encontramos la primera evidencia directa de la formación de estrellas que ocurre dentro de las masivas salidas galácticas. Este descubrimiento sugiere un nuevo modo de formación estelar que podría impactar en la evolución de las galaxias y enriquecer el medio intergaláctico.

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Área de la Ciencia:

  • Astronomía y astrofísica
  • Evolución de las galaxias
  • Formación Estelar

Sus antecedentes:

  • Las masivas salidas galácticas poseen condiciones propicias para la formación de estrellas.
  • Los modelos predicen la formación de estrellas dentro de las salidas, impactando la morfología de las galaxias y las poblaciones estelares.
  • La evidencia observacional para la formación de estrellas dentro de las salidas actualmente falta.

Objetivo del estudio:

  • Para proporcionar evidencia observacional inequívoca de la formación de estrellas dentro de una salida galáctica.
  • Investigar el impacto potencial de este modo de formación de estrellas en la evolución de las galaxias y el enriquecimiento químico.

Principales métodos:

  • Observaciones espectroscópicas de una salida galáctica a un desplazamiento al rojo de 0,0448.
  • Análisis de datos espectrales para identificar las firmas de la formación estelar en curso.

Principales resultados:

  • Detección inequívoca de la formación de estrellas dentro del flujo galáctico observado.
  • La tasa de formación estelar inferida dentro del flujo de salida supera las 15 masas solares por año.
  • Sugiere que las observaciones anteriores pueden haber pasado por alto fenómenos similares debido a diagnósticos inadecuados.

Conclusiones:

  • La formación de estrellas puede ocurrir dentro de las salidas galácticas, desafiando las suposiciones anteriores.
  • Este modo de formación estelar puede desempeñar un papel importante en la evolución de las galaxias y el enriquecimiento químico del medio circumgaláctico e intergaláctico.
  • Se necesitan observaciones adicionales con diagnósticos apropiados para evaluar la prevalencia de la formación de estrellas en las salidas galácticas.