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Imágenes infrarrojas del disco de tránsito en el sistema Epsilon Aurigae
Brian Kloppenborg1, Robert Stencel, John D Monnier
1Department of Physics and Astronomy, University of Denver, 2112 East Wesley Avenue, Denver, Colorado 80208, USA. bkloppen@du.edu
Nature
|April 9, 2010
Resumen
El Epsilon Aurigae eclipsando el sistema binario.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Evolución Estelar Evolución Estelar
- Sistemas de estrellas binarias sistemas estelares binarios.
Sus antecedentes:
- Epsilon Aurigae es un sistema binario eclipsante de largo período con un compañero misterioso e indetectable.
- Las teorías anteriores sugerían que el compañero era un objeto masivo como un agujero negro o una estrella infrarroja.
- Hipótesis recientes propusieron una estrella de tipo F de baja masa con un disco oscurecedor.
Objetivo del estudio:
- Para resolver la controversia de 190 años que rodea la naturaleza de la compañera de Epsilon Aurigae.
- Para proporcionar evidencia observacional directa del objeto eclipsante.
- Para determinar la masa de la estrella visible de tipo F.
Principales métodos:
- Utilizando imágenes interferométricas para obtener datos visuales directos del cuerpo eclipsante.
- Analizando los elementos orbitales y las relaciones masa-luminosidad.
- Comparar los datos de observación con los modelos teóricos existentes.
Principales resultados:
- Las imágenes directas confirmaron que el cuerpo eclipsado es un disco opaco y inclinado.
- La estrella visible es una estrella de tipo F de baja masa (3,6 +/- 0,7 masas solares).
- La estrella compañera es de tipo B5V con una masa de 5,9 masas solares.
Conclusiones:
- El objeto eclipsado es un disco de polvo dinámicamente insignificante, no un compañero masivo.
- El estudio resuelve el antiguo misterio de los eclipses de Epsilon Aurigae.
- Se han determinado las masas estelares exactas para el sistema binario.
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