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.

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ESO

Om bilden

ID:eso0215b
Typ:Simulering
Publiceringsdatum:15 maj 2002
Relaterade pressmeddelanden:eso0215
Storlek:785 x 778 px

Om objektet

Namn:xi Hya
Typ:Milky Way : Star : Evolutionary Stage : Red Giant
Avstånd:130 ljusår
Kategori:Stars

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