{"id":20881,"date":"2025-07-14T09:37:08","date_gmt":"2025-07-14T07:37:08","guid":{"rendered":"https:\/\/igfae.usc.es\/igfae\/?p=20881"},"modified":"2025-08-19T14:28:03","modified_gmt":"2025-08-19T12:28:03","slug":"gw231123","status":"publish","type":"post","link":"https:\/\/igfae.usc.es\/igfae\/gw231123\/","title":{"rendered":"Buracos negros chocando no l\u00edmite da relatividade de Einstein: un achado de r\u00e9cord co protagonismo do IGFAE"},"content":{"rendered":"<p>O 23 de novembro de 2023, despois de mill\u00f3ns de anos de viaxe a trav\u00e9s do universo, unha sinal en forma de ondas gravitacionais chegou \u00e1 Terra. Foi detectada ao mesmo tempo polos observatorios de Hanford e Livingston, separados por m\u00e1is de 3.000 quil\u00f3metros nos Estados Unidos. Pero esta sinal, bautizada como <strong>GW231123<\/strong>, non era unha m\u00e1is: foi causada pola colisi\u00f3n de buracos negros m\u00e1is brutal que a humanidade puido observar ata o de agora.<\/p>\n<p>Este luns, despois de case dous anos de an\u00e1lise, a colaboraci\u00f3n LIGO \u2014na que participa o Instituto Galego de F\u00edsica de Altas Enerx\u00edas (IGFAE)\u2014 xunto coas colaboraci\u00f3ns Virgo e KAGRA, <a href=\"https:\/\/arxiv.org\/abs\/2507.08219\" target=\"_blank\" rel=\"noopener\">anunciou o achado<\/a> deste fen\u00f3meno c\u00f3smico \u201cde r\u00e9cord\u201d. O resultado desta fusi\u00f3n de dous buracos negros, duns 100 e 140 veces a masa do noso Sol, \u00e9 un obxecto de 240 masas solares. As caracter\u00edsticas deste evento sit\u00faano preto dos l\u00edmites do permitido pola teor\u00eda da relatividade xeral de Einstein.<\/p>\n<p>\u201cEsta \u00e9 a fusi\u00f3n de buracos negros m\u00e1is masiva que temos detectado mediante ondas gravitacionais, e a s\u00faa interpretaci\u00f3n sup\u00f3n \u00e1 vez unha gran pista e un gran desaf\u00edo para o noso entendemento dos procesos de formaci\u00f3n de buracos negros\u201d, afirma o Dr. Juan Calder\u00f3n Bustillo, investigador Ram\u00f3n y Cajal no IGFAE, centro mixto da Universidade de Santiago de Compostela e a Xunta de Galicia.<\/p>\n<p>Ata agora, observ\u00e1ranse aproximadamente 100 fusi\u00f3ns de buracos negros mediante ondas gravitacionais. A maior fora a co\u00f1ecida como fonte GW190521 \u2014descuberta en 2019\u2014, cunha masa total moito menor: &#8220;s\u00f3&#8221; 140 veces a do Sol, cuxo an\u00e1lise coordinou Calder\u00f3n Bustillo. \u201cAgora batemos o noso r\u00e9cord, case dobrando a masa!\u201d, destaca.<\/p>\n<h4><strong>Unha t\u00e9cnica do IGFAE para estudar xeraci\u00f3ns de buracos negros<\/strong><\/h4>\n<p>Ademais da s\u00faa enorme masa, estes dous buracos negros xiran sobre si mesmos a gran velocidade. Estes dous aspectos converten esta sinal nun desaf\u00edo \u00fanico para a s\u00faa interpretaci\u00f3n e suxiren unha historia de formaci\u00f3n complexa. \u201cEn principio, estes buracos negros non deber\u00edan poder formarse mediante o colapso de estrelas ao final das s\u00faas vidas. Polo tanto, \u00e9 posible que estes dous buracos negros procedan de sucesivas fusi\u00f3ns previas de buracos negros m\u00e1is pequenos\u201d, apunta Juan Calder\u00f3n Bustillo. Aqu\u00ed reside unha das principais contribuci\u00f3ns do IGFAE a este descubrimento, a trav\u00e9s de t\u00e9cnicas desenvolvidas polo equipo do Instituto, <a href=\"https:\/\/igfae.usc.es\/igfae\/xenealoxia-dos-buracos-negros\/\" target=\"_blank\" rel=\"noopener\">e que se utilizaron en estudos recentes para entender a orixe destes eventos.<\/a><\/p>\n<p>\u201cCon estas t\u00e9cnicas puidemos reconstru\u00edr a xenealox\u00eda destes buracos negros. Vimos que \u00e9 moi probable que o maior deles sexa un buraco negro de \u2018terceira\u2019 xeraci\u00f3n. \u00c9 dicir, no mellor dos casos ser\u00edan os seus \u2018av\u00f3s\u2019 os que se puideron formar mediante colapso estelar&#8221;.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-20882\" src=\"https:\/\/igfae.usc.es\/igfae\/wp-content\/uploads\/gw231123-scaled.jpg\" alt=\"\" width=\"2560\" height=\"1463\" srcset=\"https:\/\/igfae.usc.es\/igfae\/wp-content\/uploads\/gw231123-scaled.jpg 2560w, https:\/\/igfae.usc.es\/igfae\/wp-content\/uploads\/gw231123-1500x857.jpg 1500w, https:\/\/igfae.usc.es\/igfae\/wp-content\/uploads\/gw231123-750x429.jpg 750w, https:\/\/igfae.usc.es\/igfae\/wp-content\/uploads\/gw231123-30x17.jpg 30w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/p>\n<h4><strong>No l\u00edmite da relatividade xeral e dos sistemas de detecci\u00f3n<\/strong><\/h4>\n<p>A gran masa e a r\u00e1pida rotaci\u00f3n dos buracos negros na sinal GW231123 levan ao l\u00edmite tanto os algoritmos que se usan para a detecci\u00f3n de ondas gravitacionais como os modelos te\u00f3ricos que permiten a s\u00faa interpretaci\u00f3n. Detectar sistemas tan masivos require t\u00e9cnicas complexas, cuxo desenvolvemento foi liderado polo IGFAE durante o \u00faltimo lustro.<\/p>\n<p>\u201cAs sinais de sistemas como GW231123 son extremadamente curtas, facilmente confundibles con sinais artificiais que contaminan continuamente os nosos detectores\u201d, explica o Dr. Thomas Dent, Investigador Distinguido no IGFAE desde 2018 e fundador do programa de investigaci\u00f3n en ondas gravitacionais.<\/p>\n<p>\u201cUnha das nosas principais li\u00f1as de traballo \u00e9 o desenvolvemento de t\u00e9cnicas complexas que permiten descartar sinais artificiais. Isto perm\u00edtenos optimizar a sensibilidade dos nosos sistemas de detecci\u00f3n\u201d, afirma Dent. \u201cDe feito, o sistema PyCBC, que desenvolvemos aqu\u00ed, foi o que proporcionou o que chamamos a \u2018alerta r\u00e1pida\u2019 de que detect\u00e1ramos algo\u201d. Finalmente, extraer informaci\u00f3n precisa da sinal requiriu o uso de modelos te\u00f3ricos que recollesen a complexa din\u00e1mica de buracos negros con gran rotaci\u00f3n.<\/p>\n<p>No futuro, o equipo do IGFAE continuar\u00e1 refinando as s\u00faas an\u00e1lises e mellorando os modelos utilizados para interpretar este tipo de eventos extremos. \u201cLevar\u00e1 anos co\u00f1ecer a verdadeira natureza deste tipo de fontes\u201d, avanzan Juan Calder\u00f3n Bustillo e Thomas Dent.<\/p>\n<p>\u201cS\u00e1bese que este tipo de sinais adoita ofrecer varias posibles interpretaci\u00f3ns. A\u00ednda que a m\u00e1is probable parece ser a fusi\u00f3n de dous buracos negros nunha \u00f3rbita circular que \u2018oscila\u2019, estudos futuros poder\u00edan revelar que en realidade se trata dunha \u00f3rbita exc\u00e9ntrica ou \u2013 como xa se ten proposto no pasado \u2013 quizais esteamos vendo algo m\u00e1is, al\u00e9n dos buracos negros\u201d, engaden ambos.<\/p>\n<p>Concl\u00fae Thomas Dent que, \u201cademais dos desenvolvementos te\u00f3ricos necesarios, a acumulaci\u00f3n de m\u00e1is observaci\u00f3ns deste estilo permitir\u00e1n investigar con moito m\u00e1is detalle como chegan a formarse estes buracos negros e o como funcionan as estrelas que nalg\u00fan momento morreron para darlles vida a eles, ou aos seus devanceiros\u201d.<\/p>\n<h4><strong>As ondas gravitacionais e o papel do IGFAE en LIGO<\/strong><\/h4>\n<p>As ondas gravitacionais son ondulaci\u00f3ns no tecido espazo-temporal que viaxan \u00e1 velocidade da luz, e que se producen como consecuencia dos eventos m\u00e1is violentos do Universo, como as fusi\u00f3ns de buracos negros ou as explosi\u00f3ns de estrelas (supernovas). Foron postuladas teoricamente por Albert Einstein hai m\u00e1is de 100 anos, pero non se puideron observar directamente ata o ano 2015, cando o logrou a colaboraci\u00f3n LIGO.<\/p>\n<p>Este achado supuxo un dos grandes fitos da f\u00edsica das \u00faltimas d\u00e9cadas. Tres dos principais art\u00edfices deste descubrimento (<a href=\"https:\/\/igfae.usc.es\/igfae\/kip-thorne\/\">Kip Thorne<\/a>, Barry C. Barish e Rainer Weiss), recibiron o Premio Nobel de F\u00edsica en 2017, entre outros moitos reco\u00f1ecementos.<\/p>\n<p>Despois da acreditaci\u00f3n como Unidade de Excelencia Mar\u00eda de Maeztu, en 2017, identificouse o gran potencial da li\u00f1a de <a href=\"https:\/\/igfae.usc.es\/igfae\/programa-de-investigacion\/gravitational-waves\/\">investigaci\u00f3n de ondas gravitacionais<\/a>. A aposta por esta disciplina fixo posible que o IGFAE se incorporase en outubro de 2018 a LIGO, onde ocupa posici\u00f3ns de relevancia dentro deste experimento, no que participan m\u00e1is de 1.500 persoas de todo o mundo.<\/p>\n<h5><strong>Sobre o IGFAE<\/strong><\/h5>\n<p>O\u00a0Instituto Galego de F\u00edsica de Altas Enerx\u00edas (IGFAE), \u00e9 un centro de investigaci\u00f3n creado en 1999 pola Universidade de Santiago de Compostela e a Xunta de Galicia. Naceu co obxectivo de coordinar e fomentar a investigaci\u00f3n cient\u00edfica e t\u00e9cnica nos campos da F\u00edsica de Alta Enerx\u00eda, Part\u00edculas e Nuclear, e \u00e1reas relacionadas como a Astrof\u00edsica, a F\u00edsica M\u00e9dica ou a Instrumentaci\u00f3n. Acolle a arredor de 140 persoas que participan en instalaci\u00f3ns experimentais como o CERN, o Observatorio Pierre Auger, LIGO ou GSI\/FAIR, entre outras.<\/p>\n<p>O centro foi acreditado en d\u00faas ocasi\u00f3ns (2017 e 2023) como Unidade de Excelencia Mar\u00eda de Maeztu por parte da Axencia Estatal de Investigaci\u00f3n do Goberno de Espa\u00f1a. Tam\u00e9n forma parte da rede CIGUS da Xunta de Galicia, que acredita a calidade e o impacto da s\u00faa investigaci\u00f3n. Est\u00e1 cofinanciado pola Uni\u00f3n Europea a trav\u00e9s do Programa Galicia Feder 2021-2027.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>O 23 de novembro de 2023, despois de mill\u00f3ns de anos de viaxe a trav\u00e9s do universo, unha sinal en forma de ondas gravitacionais chegou \u00e1 Terra. Foi detectada ao mesmo tempo polos observatorios de Hanford e Livingston, separados por m\u00e1is de 3.000 quil\u00f3metros nos Estados Unidos. Pero esta sinal, bautizada como GW231123, non era [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":20862,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[166,217],"class_list":["post-20881","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-novas-2","category-novas-cientificas-2"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Buracos negros chocando no l\u00edmite da relatividade de Einstein: un achado de r\u00e9cord co protagonismo do IGFAE - IGFAE<\/title>\n<meta name=\"description\" content=\"A colaboraci\u00f3n LIGO-Virgo-KAGRA anuncia a detecci\u00f3n dunha onda gravitacional que abre novas perspectivas no estudo destes eventos c\u00f3smicos\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/igfae.usc.es\/igfae\/gw231123\/\" \/>\n<meta property=\"og:locale\" content=\"gl_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Buracos negros chocando no l\u00edmite da relatividade de Einstein: un achado de r\u00e9cord co protagonismo do IGFAE - 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