Non-radial oscillations in the giant star xi Hya

A computer-generated illustration of one possible non-radial oscillation mode in the giant star xi Hya. The blue parts contain particles in the upper stellar atmosphere moving away from the stellar centre, hence they cause a "blue-shift" (towards shorter wavelengths) in the spectrum for the observer. At the same time, particles in the red parts move towards the stellar centre and cause a "red-shift" (towards longer wavelengths). Particles in the white regions do not move during the oscillation cycle. Half an oscillation cycle later, the red parts will have become blue and vice versa.

Crédito:
ESO

Sobre la imagen

Identificador:eso0215b
Tipo:Simulación
Fecha de publicación:15 de Mayo de 2002
Noticias relacionadas:eso0215
Tamaño:785 x 778 px

Sobre el objeto

Nombre:xi Hya
Tipo:Milky Way : Star : Evolutionary Stage : Red Giant
Distancia:130 años luz
Categoría:Stars

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