Structure of the pulsating red giant S Ori (artist's impression)

Sketch of the structure of a pulsating red giant, as derived by the recent interferometric study on S Orionis. The environment around the parent star is made up by three main components : a molecular shell (inner red layer), a dust shell (outer red layer) and a maser shell (red and green speckles). Grains of aluminum oxide constitute most of the dust shell (observed in the infrared band), while the maser radio emission comes from silicon monoxide molecules. The maser spots velocities indicates that the gas is expanding, at a speed of about 10 km/s.

Credit:

ESO

Over de afbeelding

Id:eso0725b
Type:Ontwerp
Publicatiedatum:31 mei 2007
Gerelateerde berichten:eso0725
Grootte:3491 x 3476 px

Over het object

Naam:S Orionis
Type:Milky Way : Star : Evolutionary Stage : Red Giant
Afstand:1400 lichtjaren
Categorie:Illustrations
Stars

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