The radial velocity method (artist’s impression)

The radial velocity method to detect exoplanet is based on the detection of variations in the velocity of the central star, due to the changing direction of the gravitational pull from an (unseen) exoplanet as it orbits the star. When the star moves towards us, its spectrum is blueshifted, while it is redshifted when it moves away from us. By regularly looking at the spectrum of a star - and so, measure its velocity - one can see if it moves periodically due to the influence of a companion.

Mynd/Myndskeið:

ESO

Um myndina

Auðkenni:eso0722e
Tegund:Uppdráttur
Útgáfudagur:25. apríl 2007
Tengdar fréttatilkynningar:eso0722
Stærð:2374 x 1773 px

Um fyrirbærið

Nafn:Radial velocity
Tegund:Unspecified : Planet
Flokkur:Cosmology
Illustrations

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