En l'absence de perturbations externes, les axes de rotation de deux corps dans un système binaire ont tendance à être alignés l'un avec l'autre et perpendiculaires au plan orbital. Cette tendance est vraie même pour les systèmes exotiques, comme les binaires à rayons X, dans lesquels une étoile tourne autour d'un trou noir en lui offrant une partie de son gaz. Mais une équipe d’astrophysiciens vient de trouver un cas où l’axe de rotation du trou noir est incliné de plus de 40° par rapport à l’axe orbital… L’étude est publiée dans Science.
Emissions
- Ça Se Passe Là-Haut
- #1302 : Un trou noir très désaxé au sein d'une binaire X
Publié le par eric simon
Eric Simon
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