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#1617 : Découverte d'une étoile grande comme seulement 7 fois la Terre

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Des astrophysiciens chinois ont récemment découvert un système d’étoiles binaires étonnant, composé d’une naine blanche et d’une petite étoile de type sous-naine chaude. Les deux étoiles se tournent autour l'une de l'autre en seulement 20,5 minutes. Et elles sont sur le point de générer un fort rayonnement d’ondes gravitationnelles d’une fréquence de l'ordre du millihertz, qui devrait être détecté par les futurs observatoires spatiaux d’ondes gravitationnelles. Ils publient leur étude dans Nature Astronomy.
https://www.ca-se-passe-la-haut.fr/2024/02/decouverte-dune-etoile-grande-comme.html

Source

A seven-Earth-radius helium-burning star inside a 20.5-min detached binary
Jie Lin et al.
Nature Astronomy (9 february 2024)
https://doi.org/10.1038/s41550-023-02188-2

  continue reading

1700 episoade

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Manage episode 400601779 series 1296652
Content provided by Eric Simon. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by Eric Simon or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://ro.player.fm/legal.

Des astrophysiciens chinois ont récemment découvert un système d’étoiles binaires étonnant, composé d’une naine blanche et d’une petite étoile de type sous-naine chaude. Les deux étoiles se tournent autour l'une de l'autre en seulement 20,5 minutes. Et elles sont sur le point de générer un fort rayonnement d’ondes gravitationnelles d’une fréquence de l'ordre du millihertz, qui devrait être détecté par les futurs observatoires spatiaux d’ondes gravitationnelles. Ils publient leur étude dans Nature Astronomy.
https://www.ca-se-passe-la-haut.fr/2024/02/decouverte-dune-etoile-grande-comme.html

Source

A seven-Earth-radius helium-burning star inside a 20.5-min detached binary
Jie Lin et al.
Nature Astronomy (9 february 2024)
https://doi.org/10.1038/s41550-023-02188-2

  continue reading

1700 episoade

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