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La formación de estrellas por colapso gravitacional en lugar de por acreción competitiva
Mark R Krumholz1, Christopher F McKee, Richard I Klein
1Astrophysics Department, Princeton University, Princeton, New Jersey 08544, USA. krumholz@astro.princeton.edu
Nature
|November 18, 2005
Resumen
Las estrellas se forman principalmente a través del colapso gravitacional, no por acreción competitiva. Este estudio muestra que las regiones de formación estelar observadas no apoyan la acreción competitiva, refutando su papel en la determinación de la masa estelar.
Área de la Ciencia:
- La astrofísica es la astrofísica.
- Formación Estelar Formación Estelar.
Sus antecedentes:
- Dos modelos explican la formación estelar: el colapso gravitacional y la acreción competitiva.
- La teoría de la acreción competitiva postula que las estrellas acumulan masa después de la formación inicial, lo que influye en las masas estelares finales.
Objetivo del estudio:
- Para derivar la tasa de acreción competitiva basada en entornos de formación estelar.
- Determinar las condiciones bajo las cuales puede producirse una acreción competitiva.
Principales métodos:
- Análisis de las tasas de acreción competitivas en función del entorno de formación estelar.
- Comparación de las predicciones teóricas con los datos de observación.
Principales resultados:
- Ninguna región de formación estelar observada puede soportar una acreción competitiva significativa.
- Las simulaciones que muestran la acumulación competitiva se basan en condiciones iniciales poco realistas.
- Las estrellas se forman predominantemente a través del colapso gravitacional.
Conclusiones:
- El colapso gravitacional es el mecanismo dominante para la formación de estrellas.
- Las predicciones del modelo de acreción competitiva no están respaldadas por observaciones.
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