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.

Crédit:

ESO

À propos de l'image

Identification:eso0722e
Type:Dessin
Date de publication:25 avril 2007
Communiqués de presse en rapport:eso0722
Taille:2374 x 1773 px

À propos de l'objet

Nom:Radial velocity
Type:Unspecified : Planet
Catégorie:Cosmology
Illustrations

Formats des images

Grand JPEG
339,4 Kio

Fonds d'écran

1024x768
106,7 Kio
1280x1024
157,1 Kio
1600x1200
197,2 Kio
1920x1200
255,0 Kio
2048x1536
287,6 Kio

 

Voir aussi notre