{"id":21281,"date":"2022-06-25T18:38:49","date_gmt":"2022-06-25T18:38:49","guid":{"rendered":"https:\/\/www.africa-press.net\/mali\/politique\/un-trou-noir-errant-se-baladerait-bel-et-bien-dans-notre-galaxie-2"},"modified":"2022-06-25T18:58:40","modified_gmt":"2022-06-25T18:58:40","slug":"un-trou-noir-errant-se-baladerait-bel-et-bien-dans-notre-galaxie-2","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/mali\/homepage-french\/un-trou-noir-errant-se-baladerait-bel-et-bien-dans-notre-galaxie-2","title":{"rendered":"Un trou noir errant se baladerait bel et bien dans notre galaxie"},"content":{"rendered":"

Africa-Press – Mali. <\/strong><\/span>Un trou noir errant, ou nomade, aurait \u00e9t\u00e9 rep\u00e9r\u00e9 en d\u00e9but d\u2019ann\u00e9e par une \u00e9quipe de scientifiques, pilot\u00e9e depuis Baltimore (\u00c9tats-Unis) par l\u2019astronome Kailash Sahu. Il d\u00e9riverait au sein de la Voie lact\u00e9e, sans y appartenir. C\u2019est la d\u00e9finition m\u00eame d\u2019un trou noir errant (ou, en anglais, \u00ab a rogue black hole \u00bb). Une autre \u00e9quipe d\u2019astronomes, de l\u2019universit\u00e9 de Californie \u00e0 Berkeley cette fois, a pu observer cet objet c\u00e9leste, mais n\u2019a pas fait les m\u00eames calculs, selon un article de ScienceAlert, que relaie Slate.<\/p>\n

Casey Lam et Jessica Lu, qui dirigent le projet de l\u2019universit\u00e9 de Californie, ont analys\u00e9 l\u2019objet avec un t\u00e9lescope Hubble et ont estim\u00e9 qu\u2019il \u00e9tait plus petit que ce qu\u2019avait calcul\u00e9 l\u2019\u00e9quipe de Kailash Sahu. Une diff\u00e9rence de taille qui change beaucoup de choses puisque cela fait tout simplement sortir l\u2019objet de la cat\u00e9gorie des trous noirs pour le faire entrer dans celle des \u00e9toiles \u00e0 neutrons.<\/p>\n

Alors que Kailash Sahu avait indiqu\u00e9 \u2013 apr\u00e8s avoir \u00e9galement utilis\u00e9 un t\u00e9lescope Hubble \u2013 qu\u2019il avait rep\u00e9r\u00e9 un trou noir errant pesant 7,1 fois la masse du soleil, Casey Lam et Jessica Lu ont pour leur part dit avoir trouv\u00e9 un objet c\u00e9leste pesant entre 1,6 et 4,4 fois la masse du Soleil. Dans les deux \u00e9tudes, \u00ab OB110462 \u00bb (c\u2019est son petit nom) a \u00e9t\u00e9 rep\u00e9r\u00e9 en train de flotter dans notre galaxie \u00e0 plusieurs milliers d\u2019ann\u00e9es-lumi\u00e8re.<\/p>\n

La microlentille gravitationnelle offre de nouvelles perspectives<\/b><\/p>\n

Dans les deux cas, aussi, c\u2019est une technique d\u2019observation par microlentille gravitationnelle qui a \u00e9t\u00e9 utilis\u00e9e. Elle permet, au contraire de la lentille gravitationnelle, de rep\u00e9rer des objets c\u00e9lestes sombres ou \u00e9mettant peu de lumi\u00e8re.<\/p>\n

Il n\u2019y a donc pas encore de consensus scientifique. Mais qu\u2019il s\u2019agisse d\u2019un trou noir errant ou d\u2019une \u00e9toile \u00e0 neutrons, Jessica Lu a d\u00e9clar\u00e9 : \u00ab C\u2019est le premier trou noir ou la premi\u00e8re \u00e9toile \u00e0 neutrons flottant librement et d\u00e9couvert \u00e0 la microlentille gravitationnelle. \u00bb Un immense progr\u00e8s scientifique en soi.<\/p>\n

Newsletter sciences et tech Grands entretiens, d\u00e9couvertes majeures, innovations et coulisses\u2026 Chaque samedi, plongez dans l\u2019actualit\u00e9 de la sciences et des techs.<\/p>\n

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

Africa-Press – Mali. Un trou noir errant, ou nomade, aurait \u00e9t\u00e9 rep\u00e9r\u00e9 en d\u00e9but d\u2019ann\u00e9e par une \u00e9quipe de scientifiques, pilot\u00e9e depuis Baltimore (\u00c9tats-Unis) par l\u2019astronome Kailash Sahu. Il d\u00e9riverait au sein de la Voie lact\u00e9e, sans y appartenir. C\u2019est la d\u00e9finition m\u00eame d\u2019un trou noir errant (ou, en anglais, \u00ab a rogue black hole […]<\/p>\n","protected":false},"author":82,"featured_media":21280,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,11,17],"tags":[76,86,766,267,19,268,467],"class_list":["post-21281","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-homepage-french","category-toutes-les-actualites","tag-africa-press","tag-africa-press-mali","tag-africa-press-tchad","tag-astronomie","tag-mali","tag-sciences-nature","tag-tchad"],"yoast_head":"\nUn trou noir errant se baladerait bel et bien dans notre galaxie - Mali<\/title>\n<meta name=\"description\" content=\"Un trou noir errant, ou nomade, aurait \u00e9t\u00e9 rep\u00e9r\u00e9 en d\u00e9but d\u2019ann\u00e9e par une \u00e9quipe de scientifiques, pilot\u00e9e depuis Balti ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/mali\/homepage-french\/un-trou-noir-errant-se-baladerait-bel-et-bien-dans-notre-galaxie-2\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Un trou noir errant se baladerait bel et bien dans notre galaxie\" \/>\n<meta property=\"og:description\" content=\"Un trou noir errant, ou nomade, aurait \u00e9t\u00e9 rep\u00e9r\u00e9 en d\u00e9but d\u2019ann\u00e9e par une \u00e9quipe de scientifiques, pilot\u00e9e depuis Balti ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/mali\/homepage-french\/un-trou-noir-errant-se-baladerait-bel-et-bien-dans-notre-galaxie-2\" \/>\n<meta property=\"og:site_name\" content=\"Mali\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/AfricaPressTunisiaa\" \/>\n<meta property=\"article:published_time\" content=\"2022-06-25T18:38:49+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-06-25T18:58:40+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/06\/postQueueImg_10-62b75acb44e31.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1250\" \/>\n\t<meta property=\"og:image:height\" content=\"625\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/un-trou-noir-errant-se-baladerait-bel-et-bien-dans-notre-galaxie-2#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/un-trou-noir-errant-se-baladerait-bel-et-bien-dans-notre-galaxie-2\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Un trou noir errant se baladerait bel et bien dans notre galaxie\",\"datePublished\":\"2022-06-25T18:38:49+00:00\",\"dateModified\":\"2022-06-25T18:58:40+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/un-trou-noir-errant-se-baladerait-bel-et-bien-dans-notre-galaxie-2\"},\"wordCount\":412,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/un-trou-noir-errant-se-baladerait-bel-et-bien-dans-notre-galaxie-2#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/06\/postQueueImg_10-62b75acb44e31.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Mali\",\"Africa Press-Tchad\",\"Astronomie\",\"mali\",\"Sciences & Nature\",\"Tchad\"],\"articleSection\":[\"Divers\",\"homepage-french\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/mali\/homepage-french\/un-trou-noir-errant-se-baladerait-bel-et-bien-dans-notre-galaxie-2#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/un-trou-noir-errant-se-baladerait-bel-et-bien-dans-notre-galaxie-2\",\"url\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/un-trou-noir-errant-se-baladerait-bel-et-bien-dans-notre-galaxie-2\",\"name\":\"Un trou noir errant se baladerait bel et bien dans notre galaxie - 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