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.

Crediti:
ESO

Riguardo l'immagine

Identificazione:eso0215b
Tipo:Simulazione
Data di rilascio:15 Maggio 2002
Notizie relative:eso0215
Grandezza:785 x 778 px

Riguardo all'oggetto

Nome:xi Hya
Tipo:Milky Way : Star : Evolutionary Stage : Red Giant
Distanza:130 Anni luce
Categoria:Stars

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