SOBRE LA FORMACIÓN DEL DISCO DE SATÉLITES DE LA VÍA LÁCTEA: SIMULACIÓN DE LA COLISIÓN DE DOS GALAXIAS
ON THE FORMATION OF THE DISK OF SATELLITES OF THE MILKY WAY: SIMULATION OF THE COLLISION OF TWO GALAXIES
Keywords:
Grupo Local, Vía Láctea, Disco de Satélites, galaxias. (es)Local Group, Milky Way, Disc of Satellites, galaxies (en)
Actualmente existe evidencia para creer que las galaxias satélites de la Vía Láctea se distribuyen en una estructura en forma de disco, llamada el disco de satélites. En este artículo se presenta un estudio sobre la posible formación del disco de satélites de la Vía Láctea como el resultado de la colisión de dos galaxias de disco hace ~ 10^9 años. El estudio es realizado mediante simulaciones numéricas de N- Cuerpos con 10^6 partículas en cada galaxia y con una relación de masas de 4 a 1, con la galaxia más masiva similar a la Vía Láctea. Los resultados permiten observar cómo las fuerzas de marea entre las dos galaxias en colisión producen una distribución espacial de escombros, donde posibles grupos de estrellas yacen casi perpendicularmente al plano de la galaxia nodriza, mostrando similitud en éste aspecto con el disco de satélites de la Vía Láctea.
At present there is some evidence showing that the satellite galaxies of the Milky Way might be distributed on a disc structure, known as the disc of satellites. In this paper a study on the possible formation of the disc of satellites of the Milky Way as the result of a collision between two disc galaxies ~10 Gyr ago is shown. The study is carried out by numerical N-Body simulations with 10^6 particles in each galaxy and with a mass ratio of 4 to 1, being the larger galaxy similar to the Milky Way. The results show how tidal forces between the two colliding galaxies produce a spatial distribution of debris, where possible groups of stars lie nearly perpendicular to the plane of the host galaxy, showing similarity in this feature with the disc of satellites of the Milky Way.
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