La population des pulsars (des étoiles à neutrons qui émettent périodiquement un signal radio) englobe des objets dont la période de rotation varie de quelques millisecondes à quelques dizaines de secondes. Lorsqu'ils vieillissent et tournent plus lentement, leur émission radio doit théoriquement cesser. Aujourd’hui une équipe d’astrophysiciens présente la découverte d'un pulsar ayant une période ultra-longue de 75,88 s, d’un âge de 5,3 millions d'années, et aux propriétés spectro-temporelles uniques, ce qui met en question comment cette émission radio est générée et la vrai nature de ce pulsar... L'étude est parue dans Nature Astronomy.
- Emissions
- Ça Se Passe Là-Haut
- #1345 : Découverte d'un pulsar anormal à très longue période
Publié le par eric simon
Eric Simon
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