DOI: http://dx.doi.org/10.18257/raccefyn.774

Artículo original

Dinámica orbital en modelos realistas de galaxias: NGC 3726, NGC 3877 y NGC 4010

Fredy L. Dubeibe, Sandra M. Martínez-Sicachá, Guillermo A. González

Resumen


En el presente trabajo, utilizando una generalización del potencial de Miyamoto-Nagai, se ajustan las curvas de rotación observadas de tres galaxias espirales a las velocidades circulares analiticas. Los datos observacionales se tomaron de un conjunto de imágenes de línea de 21 centímetros (o línea HI) obtenidos con el Westerbork Synthesis Radio Telescope (WSRT), para tres galaxias particulares en el grupo de la Ursa Major: NGC 3726, NGC 3877 y NGC 4010. Seguidamente, se analiza la dinámica del sistema en términos del método de secciones de Poincaré, encontrando que para valores grandes del momento angular de la partícula de prueba o valores bajos su energía total, la din´amica es principalmente regular, mientras que en los casos opuestos, la dinámica es principalmente ca´otica. Nuestro modelo abre la posibilidad de encontrar órbitas caóticas acotadas para estrellas presentes en esas galaxias partículares. © 2019. Acad. Colomb. Cienc. Fis. Nat.


Palabras clave


Dinámica estelar, Galaxias: cinemática y dinámica, Din´amica no lineal y caos.

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Referencias


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