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Tomando imágenes de la superficie de Altair
John D Monnier1, M Zhao, E Pedretti
1Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA. monnier@umich.edu
Science (New York, N.Y.)
|June 2, 2007
Resumen
Tomamos imágenes de la estrella Altair utilizando interferometría avanzada, revelando su superficie distorsionada debido a la rápida rotación. Los modelos estándar no pudieron explicar el oscurecimiento de la gravedad observado, lo que sugiere patrones de rotación complejos.
Área de la Ciencia:
- * Astrofísica es la astrofísica.
- * Física Estelar La física estelar es la física estelar.
- * Interferometría óptica con interferometría óptica.
Sus antecedentes:
- * Comprender las superficies estelares es crucial para la física estelar.
- * Las estrellas que giran rápidamente exhiben propiedades fotosféricas únicas.
- * La interferometría óptica de larga línea de base ofrece imágenes de alta resolución de la superficie estelar.
Objetivo del estudio:
- * Para construir una imagen de alta resolución en el infrarrojo cercano de la estrella Altair, que gira rápidamente.
- * Para investigar los efectos de la rotación rápida en las fotosferas estelares.
- * Para probar modelos estelares estándar con datos de observación.
Principales métodos:
- * Interferometría óptica de línea de base larga empleada.
- * Logró imágenes de resolución inferior a un milisegundo de arco.
- * Se centra en las longitudes de onda del infrarrojo cercano.
Principales resultados:
- * Generó una imagen en infrarrojo cercano de Altair con una resolución sin precedentes.
- * Se observó claramente un oscurecimiento significativo por gravedad a través de la fotosfera estelar.
- * Se ha detectado un alto grado de distorsión fotosférica.
Conclusiones:
- * Los modelos estándar de estrellas que giran uniformemente son insuficientes para explicar la superficie observada en Altair.
- * Los hallazgos sugieren la presencia de rotación diferencial o leyes de oscurecimiento de la gravedad no estándar.
- * Se necesita más investigación para refinar los modelos de rotación estelar y oscurecimiento por gravedad.
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