{"id":18660,"date":"2023-07-20T23:00:00","date_gmt":"2023-07-20T23:00:00","guid":{"rendered":"https:\/\/www.africa-press.net\/benin\/politique\/des-astronomes-decouvrent-une-stupefiante-etoile-a-deux-faces-nommee-janus"},"modified":"2023-07-20T23:26:03","modified_gmt":"2023-07-20T23:26:03","slug":"des-astronomes-decouvrent-une-stupefiante-etoile-a-deux-faces-nommee-janus","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/benin\/toutes-les-actualites\/des-astronomes-decouvrent-une-stupefiante-etoile-a-deux-faces-nommee-janus","title":{"rendered":"Des astronomes d\u00e9couvrent une stup\u00e9fiante \u00e9toile \u00e0 deux faces, nomm\u00e9e \u00ab\u00a0Janus\u00a0\u00bb"},"content":{"rendered":"

Africa-Press – Benin. <\/strong><\/span>Nomme\u0301e Janus d’apre\u0300s le dieu romain a\u0300 deux visages, une e\u0301toile re\u0301cemment de\u0301couverte posse\u0300de une face compose\u0301e d’he\u0301lium et une autre d’hydroge\u0300ne. Cette naine blanche extraordinaire a fait l’objet d’un article dans la revue Nature.<\/b><\/p>\n

\u00ab\u00a0Lorsque je montre les observations aux gens, ils sont stupe\u0301faits\u00a0\u00bb, glisse Ilaria Caiazzo, chercheuse en post-doctorat a\u0300 l’institut Caltech, premie\u0300re auteure de l’e\u0301tude publie\u0301e dans la revue scientifique Nature (19 juillet 2023), cite\u0301e dans un communique\u0301.<\/p>\n

Cette observation est celle d’une \u00ab\u00a0naine blanche\u00a0\u00bb. Que\u0301sako ? Au fil du temps, n’importe quelle e\u0301toile se transforme d’abord en \u00ab\u00a0ge\u0301ante rouge\u00a0\u00bb. Puis, a\u0300 mesure que son c\u0153ur se contracte, elle devient une naine blanche \u2013 c’est d’ailleurs le destin qui attend notre Soleil, d’ici 5 milliards d’anne\u0301es.<\/p>\n

Mais \u00ab\u00a0Janus\u00a0\u00bb, du nom du dieu a\u0300 deux faces de la mythologie romaine, n’est pas une naine blanche comme les autres.<\/p>\n

Une naine blanche \u00ab\u00a0fortement magne\u0301tise\u0301e\u00a0\u00bb<\/b><\/p>\n

L’e\u0301toile myste\u0301rieuse a e\u0301te\u0301 de\u0301couverte gra\u0302ce au Zwicky Transient Facility (ZTF), un instrument qui scrute le ciel chaque nuit depuis l’observatoire Palomar du California Institute of Technology (Caltech), pre\u0300s de San Diego (E\u0301tats-Unis).<\/p>\n

Ilaria Caiazzo e\u0301tait a\u0300 la recherche de naines blanches \u00ab\u00a0fortement magne\u0301tise\u0301es\u00a0\u00bb, comme l’objet ce\u0301leste connu sous le nom de ZTF J1901+1458, qu’elle et son e\u0301quipe avaient de\u0301couvert pre\u0301ce\u0301demment. Un autre \u00ab\u00a0candidat\u00a0\u00bb s’est alors distingue\u0301 par ses changements rapides de luminosite\u0301.<\/p>\n

Pour plus d’informations et d’analyses sur la Benin<\/a>, suivez Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Benin. Nomme\u0301e Janus d’apre\u0300s le dieu romain a\u0300 deux visages, une e\u0301toile re\u0301cemment de\u0301couverte posse\u0300de une face compose\u0301e d’he\u0301lium et une autre d’hydroge\u0300ne. Cette naine blanche extraordinaire a fait l’objet d’un article dans la revue Nature. \u00ab\u00a0Lorsque je montre les observations aux gens, ils sont stupe\u0301faits\u00a0\u00bb, glisse Ilaria Caiazzo, chercheuse en post-doctorat a\u0300 […]<\/p>\n","protected":false},"author":82,"featured_media":18659,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[36,50,45],"class_list":["post-18660","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-benin","tag-benin"],"yoast_head":"\nDes astronomes d\u00e9couvrent une stup\u00e9fiante \u00e9toile \u00e0 deux faces, nomm\u00e9e "Janus" - B\u00e9nin<\/title>\n<meta name=\"description\" content=\"Nomme\u0301e Janus d'apre\u0300s le dieu romain a\u0300 deux visages, une e\u0301toile re\u0301cemment de\u0301couverte posse\u0300de une 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