{"id":80506,"date":"2022-06-08T10:44:43","date_gmt":"2022-06-08T07:44:43","guid":{"rendered":"https:\/\/www.lovendal.ro\/wp52\/?p=80506"},"modified":"2022-06-08T10:44:43","modified_gmt":"2022-06-08T07:44:43","slug":"aceste-galaxii-traiesc-cu-siguranta-intr-o-simulare-pe-calculator","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/aceste-galaxii-traiesc-cu-siguranta-intr-o-simulare-pe-calculator\/","title":{"rendered":"Aceste galaxii tr\u0103iesc cu siguran\u0163\u0103 \u00eentr-o simulare pe calculator!"},"content":{"rendered":"<figure id=\"attachment_80508\" aria-describedby=\"caption-attachment-80508\" style=\"width: 368px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/06\/galaxii-simulare.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-80508\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/06\/galaxii-simulare.jpg\" alt=\"\" width=\"378\" height=\"236\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/06\/galaxii-simulare.jpg 378w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/06\/galaxii-simulare-300x187.jpg 300w\" sizes=\"auto, (max-width: 378px) 100vw, 378px\" \/><\/a><figcaption id=\"caption-attachment-80508\" class=\"wp-caption-text\"><strong>Imagine<\/strong>: <a href=\"https:\/\/pixabay.com\/photos\/galaxy-big-bang-explosion-space-11188\/\" target=\"_blank\" rel=\"noopener\"><strong>pixabay.com<\/strong><\/a> (Commons Creative &#8211; free)<\/figcaption><\/figure>\n<p>Studierea Universului este un lucru cu adev\u0103rat greu. \u015ei asta din dou\u0103 motive: spa\u021biul \u0219i timpul. C\u00e2nd privim un obiect pe cerul nop\u021bii, ne uit\u0103m \u00eenapoi \u00een timp, deoarece a durat o perioad\u0103 finit\u0103 de timp pentru ca lumina de la acel obiect s\u0103 ajung\u0103 la ochii no\u015ftri. Steaua Sirius este unul dintre cele mai str\u0103lucitoare obiecte de pe cerul nop\u021bii \u0219i se afl\u0103 la aproximativ 8,6 ani-lumin\u0103 de P\u0103m\u00e2nt. Aceasta \u00eenseamn\u0103 c\u0103, atunci c\u00e2nd ne uit\u0103m la ea, vedem cum ar\u0103ta acum 8,6 ani. Acum g\u00e2ndi\u021bi-v\u0103 la ceva mult mai departe dec\u00e2t Sirius, cum ar fi Big Bang, care se presupune c\u0103 a avut loc acum 13,8 miliarde de ani. Aceasta \u00eenseamn\u0103 c\u0103 atunci c\u00e2nd oamenii de \u0219tiin\u021b\u0103 studiaz\u0103 Big Bang-ul, \u00eencearc\u0103 s\u0103 priveasc\u0103 \u00eenapoi \u00een timp cu 13,8 miliarde de ani. Chiar \u0219i cu toate instrumentele noastre \u0219tiin\u021bifice avansate, este extrem de greu s\u0103 privim at\u00e2t de departe \u00een timp. Este at\u00e2t de greu \u00eenc\u00e2t telescopul spa\u021bial Hubble a observat recent cea mai \u00eendep\u0103rtat\u0103 stea detectat\u0103 vreodat\u0103 \u00een spa\u021biul cosmic &#8211; la 12,9 miliarde de ani-lumin\u0103 distan\u021b\u0103.<\/p>\n<p>Deoarece studiul Universului este at\u00e2t de greu, oamenii de \u0219tiin\u021b\u0103 apeleaz\u0103 adesea la simul\u0103ri sau modele pe computer, pentru a ajuta la accelerarea descoperirii \u0219tiin\u021bifice \u015fi pentru a ne oferi o mai bun\u0103 \u00een\u021belegere a modului \u00een care func\u021bioneaz\u0103 Universul. \u00centr-un studiu recent publicat \u00een revista <strong><em>&#8222;Nature Astronomy&#8221;<\/em><\/strong>, cercet\u0103torii au creat simul\u0103ri care recreeaz\u0103 \u00een mod direct \u00eentregul ciclu de via\u021b\u0103 al unora dintre cele mai mari galaxii observate \u00een Universul \u00eendep\u0103rtat, acum 11 miliarde de ani. Este pentru prima dat\u0103 c\u00e2nd se realizeaz\u0103 un astfel de studiu.<\/p>\n<p>Simul\u0103rile cosmologice sunt cruciale pentru a studia modul \u00een care Universul a devenit forma pe care o are ast\u0103zi, dar multe nu se potrivesc de obicei cu ceea ce astronomii observ\u0103 prin telescoape. Simul\u0103rile cosmologice constr\u00e2nse, pe de alt\u0103 parte, sunt concepute pentru a reproduce direct structurile pe care le observ\u0103m de fapt \u00een Univers. Cu toate acestea, majoritatea simul\u0103rilor existente de acest fel au fost aplicate universului nostru local, adic\u0103 aproape de P\u0103m\u00e2nt, dar niciodat\u0103 pentru observa\u021bii ale universului \u00eendep\u0103rtat.<\/p>\n<p>Capturile de ecran din simulare arat\u0103 (sus) distribu\u021bia materiei corespunz\u0103toare distribu\u021biei galaxiilor observate la un timp de c\u0103l\u0103torie \u00een lumin\u0103 de 11 miliarde de ani (c\u00e2nd Universul avea doar 2,76 miliarde de ani, sau 20% din v\u00e2rsta sa actual\u0103) \u0219i (jos ) distribu\u021bia materiei \u00een aceea\u0219i regiune dup\u0103 11 miliarde de ani-lumin\u0103 sau corespunz\u0103toare timpului nostru actual.<\/p>\n<p><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/06\/galaxie-distributie.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-80507\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/06\/galaxie-distributie.jpg\" alt=\"\" width=\"538\" height=\"606\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/06\/galaxie-distributie.jpg 538w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2022\/06\/galaxie-distributie-266x300.jpg 266w\" sizes=\"auto, (max-width: 538px) 100vw, 538px\" \/><\/a><\/p>\n<p>O echip\u0103 de cercet\u0103tori, de la Institutul Kavli pentru Fizica \u0219i Matematica Universului, condus\u0103 de cercet\u0103torul Metin Ata \u0219i profesorul asistent de proiect Khee-Gan Lee, au fost interesa\u021bi de structurile \u00eendep\u0103rtate, cum ar fi protoclusterele masive de galaxii, care sunt str\u0103mo\u0219ii actuali ai grupurilor de galaxii, \u00eenainte de a se putea aglomera sub propria gravita\u021bie. Ei au descoperit c\u0103 studiile actuale ale protoclusterelor \u00eendep\u0103rtate erau uneori suprasimplificate, ceea ce \u00eenseamn\u0103 c\u0103 au fost f\u0103cute cu modele simple \u0219i nu cu simul\u0103ri.<\/p>\n<p><em>&#8222;Am vrut s\u0103 \u00eencerc\u0103m s\u0103 dezvolt\u0103m o simulare complet\u0103 a universului \u00eendep\u0103rtat real pentru a vedea cum au \u00eenceput structurile \u0219i cum s-au terminat&#8221;<\/em>, a spus Ata. Rezultatul lor a fost COSTCO (Constrained Simulations of The COsmos Field). Lee a spus c\u0103 dezvoltarea simul\u0103rii a fost ca \u015fi construirea unei ma\u0219ini a timpului. Deoarece lumina din Universul \u00eendep\u0103rtat ajunge pe P\u0103m\u00e2nt abia acum, telescoapele galaxiilor observate ast\u0103zi sunt o imagine a trecutului. <em>&#8222;Este ca \u0219i cum ai g\u0103si o veche poz\u0103 alb-negru a bunicului t\u0103u \u0219i ai crea un videoclip cu via\u021ba lui&#8221;<\/em>, a spus el.<\/p>\n<p>\u00cen acest sens, cercet\u0103torii au f\u0103cut instantanee ale &#8222;galaxiilor-bunici&#8221; din Univers \u0219i apoi au avansat rapid v\u00e2rsta pentru a studia cum s-ar forma clusterele de galaxii. Lumina galaxiilor folosite de cercet\u0103tori a c\u0103l\u0103torit 11 miliarde de ani lumin\u0103 pentru a ajunge la noi, ceea ce \u00eenseamn\u0103 c\u0103 vedem cum ar\u0103tau ele acum 11 miliarde de ani.<\/p>\n<p>Un alt motiv important pentru care cercet\u0103torii au creat aceste simul\u0103ri a fost testarea modelului standard al cosmologiei, care este folosit pentru a descrie fizica Universului. Prev\u0103z\u00e2nd masa final\u0103 \u0219i distribu\u021bia final\u0103 a structurilor din fiecare spa\u021biu, cercet\u0103torii ar putea dezv\u0103lui discrepan\u021be nedetectate anterior \u00een \u00een\u021belegerea noastr\u0103 actual\u0103 a Universului.<\/p>\n<p>Folosind simul\u0103rile lor, cercet\u0103torii au reu\u0219it s\u0103 g\u0103seasc\u0103 dovezi ale a trei protoclustere de galaxii deja publicate \u0219i s\u0103 defavorizeze o structur\u0103. \u00cen plus, ei au reu\u0219it s\u0103 identifice \u00eenc\u0103 cinci structuri care s-au format \u00een mod constant \u00een simul\u0103rile lor. Acesta include proto-superclusterul Hyperion, cel mai mare \u0219i mai vechi proto-supercluster cunoscut ast\u0103zi, care are masa de 5000 de ori mai mare dec\u00e2t cea a galaxiei noastre, Calea Lactee.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Studierea Universului este un lucru cu adev\u0103rat greu. \u015ei asta din dou\u0103 motive: spa\u021biul \u0219i timpul. C\u00e2nd privim un obiect pe cerul nop\u021bii, ne uit\u0103m \u00eenapoi \u00een timp, deoarece a durat o perioad\u0103 finit\u0103 de timp pentru ca lumina de &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Aceste galaxii tr\u0103iesc cu siguran\u0163\u0103 \u00eentr-o simulare pe calculator!\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/aceste-galaxii-traiesc-cu-siguranta-intr-o-simulare-pe-calculator\/#more-80506\" aria-label=\"Cite\u0219te mai multe despre Aceste galaxii tr\u0103iesc cu siguran\u0163\u0103 \u00eentr-o simulare pe calculator!\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":80508,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11039],"tags":[102,2027,902,1405,2973,433,1367,952,1225,105,2478,10400,1673,2501,733,434,5025,789,1084,1087],"class_list":["post-80506","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomie","tag-astronomie","tag-big-bang","tag-calculator","tag-calea-lactee","tag-cosmologie","tag-galaxie","tag-gravitatie","tag-lumina","tag-masina-timpului","tag-pamant","tag-profesor","tag-simulare","tag-sirius","tag-spatiu","tag-stea","tag-telescop","tag-telescopul-hubble","tag-timp","tag-trecut","tag-univers","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.3 (Yoast SEO v24.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Aceste galaxii tr\u0103iesc cu siguran\u0163\u0103 \u00eentr-o simulare pe calculator! - Secretele lui Lovendal<\/title>\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.lovendal.ro\/wp52\/aceste-galaxii-traiesc-cu-siguranta-intr-o-simulare-pe-calculator\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Aceste galaxii tr\u0103iesc cu siguran\u0163\u0103 \u00eentr-o simulare pe calculator!\" \/>\n<meta property=\"og:description\" content=\"Studierea Universului este un lucru cu adev\u0103rat greu. \u015ei asta din dou\u0103 motive: spa\u021biul \u0219i timpul. 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