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Yaskravi infrachervoni galaktiki angl Luminous Infrared Galaxies LIRGs ce galaktiki zi svitnostyami ponad 1011 L Ci galaktiki bilsh poshireni nizh galaktiki zi spalahom zoreutvorennya sejfertivski galaktiki ta kvazari shozhoyi svitnosti Infrachervoni galaktiki viprominyuyut bilshe energiyi u infrachervonomu diapazoni nizh na vsih inshih dovzhinah hvili razom Svitnist LIRG stanovit 100 milyardiv svitnostej Soncya Galaktiki zi svitnostyami ponad 1012 svitnostej Soncya mayut nazvu nadyaskravi infrachervoni galaktiki angl Ultra Luminous Infrared Galaxies ULIRGs Bagato LIRGiv ta ULIRGiv demonstruyut procesi vzayemodiyi galaktik zlittya porushennya strukturi Bagato z galaktik cih tipiv narodzhuyut ponad 100 zir na rik nasha galaktika narodzhuye blizko odnoyi zori na rik Yaskravishimi nizh ULIRG ye giperyaskravi infrachervoni galaktiki angl Hyper Luminous Infrared Galaxies HLIRG a najyaskravishimi infrachervonimi galaktikami ye ekstremalno yaskravi infrachervoni galaktiki angl Extremely Luminous Infrared Galaxies ELIRG Zmist 1 Pohodzhennya ta evolyuciya LIRG 2 ULIRG 3 HyLIRG 4 ELIRG 5 Sposterezhennya 5 1 IRAS 5 2 GOALS 6 Spisok 7 Galereya zobrazhen 8 Primitki 9 PosilannyaPohodzhennya ta evolyuciya LIRG red Za sposterezhennyami infrachervoni galaktiki ce bagati na mizhzoryanij gaz galaktiki z odnim spiralnim rukavom Yih yaskravist v infrachervonomu diapazoni poyasnyuyetsya perevazhno procesami zoreutvorennya v nih 1 Odnak yaskravist chastini galaktik viklikayetsya aktivnim galaktichnim yadrom yaki isnuyut u kompaktnih regionah v centrah galaktik ta mayut vishu za zvichajnu yaskravist Viprominyuvannya vid aktivnih galaktichnih yader sposterigalis na vsih dovzhinah hvil radio infrachervonih vidimih ultrafioletovih rentgenivskih ta gamma Ci vidi galaktik buli vidkriti 1983 roku za dopomogoyu IRAS U deyakih vipadkah yaskravist LIRG mozhe viklikatis oboma dzherelami spalahom zoreutvorennya ta aktivnim galaktichnim yadrom 2 Infrachervoni galaktiki viprominyuyut bilshe energiyi v infrachervonij chastini spektru nevidimij neozbroyenomu oku Energiya viprominennya LIRG porivnyuvana z energiyeyu kvazara yaki ranishe vvazhalisya najenergijnishimi ob yektami Vsesvitu 3 Z Zemli ne vidno vidimogo svitla vid cih galaktik cherez veliku kilkist mizhzoryanogo gazu v nih yakij poglinaye bilshist vidimogo svitla ta pereviprominyuye jogo v infrachervonomu diapazoni Velika kilkist duzhe yaskravih galaktik u Vsesviti takih yak LIRG mayut aktivnu chornu diru Takozh LIRG sposterigayutsya na shilnishih dilyankah kosmosu nizh tmyanishi galaktiki ULIRG red nbsp IRAS 14348 1447 nadyaskrava infrachervona galaktika roztashovana na vidstani ponad 1 mlrd svitlovih rokiv vid nas 4 LIRGi takozh mozhut stavati nadyaskravimi infrachervonimi galaktikami angl Ultra Luminous Infrared Galaxys ULIRG ale ne isnuye yakoyis chasovoyi shkali oskilki ne kozhen LIRG staye ULIRG u rozrahunkah zastosovuyetsya klasichna mehanika a obmezhennya ne zovsim priblizni Doslidzhennya pokazali sho v ULIRG bilsha jmovirnist isnuvannya aktivnogo galaktichnogo yadra nizh u LIRG 5 Za odnim z doslidzhen ULIRG ye prosto chastinoyu evolyucijnogo procesu zlittya galaktik Tobto dvi chi bilshe spiralnih galaktik sho skladayutsya z plaskogo disku z zir gazu ta pilu ta centralnogo baldzha formuyut rannyu stadiyu novoyi galaktiki sho utvoryuye LIRG Na piznij stadiyi zlittya vona peretvoryuyetsya na ULIRG Potim vona staye kvazarom a u finalnij stadiyi zlittya eliptichnoyu galaktikoyu 3 Odnim zi svidchen na korist cogo ye te sho v eliptichnih galaktikah zori nabagato starshi nizh na ranishih stadiyah evolyuciyi galaktik HyLIRG red Nadyaskravi infrachervoni galaktiki Hyper luminous Infrared Galaxies skorocheni yak HyLIRG HiLIRG chi HLIRG vvazhayutsya odnimi z najyaskravishih trivalih ob yektiv u Vsesviti yaki demonstruyut nadzvichajno visokij stupin zoreutvorennya ta bilshist z yakih mayut aktivni yadra galaktik Voni viznachayutsya yak galaktiki z svitnistyu ponad 1013 L 6 na vidminu vid mensh yaskravoyi populyaciyi ULIRG L 1012 1013 L HLIRG buli vpershe identifikovani pri povtornih sposterezhennyah misiyeyu IRAS 7 8 Galaktika IRAS F10214 4724 tipu HyLIRG yaku gravitacijno linzuye roztashovana blizhche eliptichna galaktika 9 vvazhalas odnim z najyaskravishih ob yektiv u Vsesviti z vlasnoyu svitnistyu 2 1013 L 10 Vvazhayetsya sho bolometrichna svitnist ciyeyi HLIRG jmovirno pidsilyuyetsya gravitacijnim linzuvannyam na faktor 30 Bilshist 80 spektru u serednomu infrachervonomu spektri takih ob yektiv ye viprominennya aktivnogo yadra galaktiki Odnak i zoreutvorennya ye znachnoyu chastinoyu viprominennya u vsih vidomih ob yektah z serednim vidsotkom 30 11 Shvidkist zoreutvorennya u HLIRG zgidno doslidzhen mozhe dosyagati 3 102 3 103 M na rik 12 ELIRG red Vidkrito 20 ekstremalno yaskravih infrachervonih galaktik ELIRG Yih ne bulo vidkrito ranishe cherez veliku vidstan do nih i te sho mizhzoryanij pil peretvoryuye vidime svitlo v infrachervone 13 14 Visunuto tri pripushennya masivnosti chornih dir v centri ELIRGiv pershe novonarodzheni chorni diri mozhut buti masivnishimi nizh vvazhalos mozhlivim druge mezha Eddingtona bula perevishena Koli chorna dira harchuyetsya gaz padaye na neyi ta nagrivayetsya vipuskayuchi svitlo Tisk cogo svitla vishtovhuye gaz nazovni obmezhuyuchi shvidkist poglinannya rechovini chornoyu diroyu Yaksho chorna dira podolala cyu mezhu vona teoretichno mozhe shvidko zbilshuvatis u rozmiri Podolannya ciyeyi mezhi chornimi dirami vzhe sposterigalos ale chornij diri u doslidzhenni potribno bulo b neodnorazovo podolati cej limit shob stati nastilki velikoyu tretye chorni diri mozhut ominati cej limit poglinayuchi gaz shvidshe nizh vvazhalosya mozhlivim yaksho chorna dira povilno obertayetsya Yaksho vona obertayetsya povilno vona ne tak silno vidshtovhuvatime gaz i vidpovidno mozhe poglinati gaz shvidshe nizh chorna dira yaka obertayetsya shvidko Masivni chorni diri u ELIRG mozhut poglinati rechovinu dovshij period Ekstremalno yaskrava infrachervona galaktika WISE J224607 57 052635 0 zi svitnistyu u 300 triljoniv svitnostej Soncya bula vidkrita WISE i stanom na traven 2015 stala najyaskravishoyu z vidomih galaktik Galaktika WISE J224607 57 052635 0 viddalena vid Zemli na 12 5 mlrd svitlovih rokiv Chorna dira v yiyi centri mala masu milyardi mas Soncya koli Vsesvit mav vik lishe 1 3 milyardi rokiv 10 suchasnogo Sposterezhennya red IRAS red Dokladnishe IRAS1983 roku suputnik IRAS zdijsniv pershij oglyad usogo neba v dalekomu infrachervonomu diapazoni Pid chas desyatimisyachnoyi misiyi bulo sposterezheno ponad 250 000 kosmichnih dzherel infrachervonogo viprominennya Do oglyadu potrapilo desyatki tisyach galaktik bagato z yakih vpershe Piznishe stalo zrozumilo sho zrostannya kilkosti vidomih galaktik bulo sprichineno tim sho LIRGi viprominyuyut bilshist svoyeyi energiyi v dalekomu infrachervonomu svitli Ih vikoristannyam IRAS naukovci zmogli viznachiti svitnist vidkritih galaktichnih ob yektiv GOALS red Oglyad LIRGiv 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