Video: Cov npuas ntawm Andromeda Nebula
2024 Tus sau: Seth Attwood | [email protected]. Kawg hloov kho: 2023-12-16 16:06
Lavxias teb sab astronomers tau pom loj gamma-duab tshav cheeb tsam nyob rau hauv lub Andromeda Nebula, zoo ib yam li "Fermi npuas" nyob rau hauv peb Galaxy.
Xyoo 2010, thaum txheeb xyuas cov ntaub ntawv sau los ntawm Fermi Space Telescope (NASA), astronomers ntawm Harvard-Smithsonian Astrophysical Center nrhiav pom cov duab loj heev uas tso tawm gamma rays hauv peb lub Galaxy. Outwardly, lawv zoo li ob lub npuas loj nyob rau ntawm ob sab ntawm lub dav hlau ntawm Milky Way disk, thiab hu ua "Fermi npuas". Qhov loj ntawm txhua npuas yog li 25 txhiab lub teeb xyoo (nco qab tias txoj kab uas hla ntawm Milky Way yog li 100 txhiab lub teeb xyoo), thiab lub hnub nyoog kwv yees li ntawm 2.5 txog 4 lab xyoo. Cov phab ntsa ntawm cov npuas emit nyob rau hauv X-ray ntau yam.
Lub hauv paus chiv keeb ntawm cov formations no tsis tau tsim unequivocally, txawm hais tias ob peb hypotheses tau muab tso rau pem hauv ntej. Astrophysicists hu lub hnub qub tawg lossis cataclysm cuam tshuam nrog lub qhov dub loj heev nyob rau hauv nruab nrab ntawm lub galaxy, kev cuam tshuam ntawm cosmic rays nrog cov teeb meem nyob ib puag ncig lub pom disk ntawm lub galaxy (galactic halo) thiab nws cov magnetic teb raws li ua tau mechanisms rau cov tsos ntawm Fermi. npuas. Tshwj xeeb, cov npuas tuaj yeem tsim los ntawm kev sib tsoo ntawm lub zog siab plasma ntws los ntawm lub qhov dub (dav hlau) nrog cov teeb meem nyob ib puag ncig lub galaxy.
Lub hav zoov ntawm Fermi npuas nyob rau hauv peb Galaxy ua rau ib tug natural assumption hais txog lub muaj peev xwm ntawm cov qauv zoo sib xws nyob rau hauv lwm lub galaxies. Ntxiv mus, qhov no yog pov thawj los ntawm qee qhov kev soj ntsuam hauv lwm qhov. Lub hom phiaj pom tseeb rau lawv qhov kev tshawb fawb yog Andromeda Nebula (M31). Tsis tsuas yog nws yog lub loj tshaj plaws galaxy nyob rau hauv lub zos pab pawg neeg thiab kuj yog lub ze tshaj plaws loj galaxy rau lub ntiaj teb, nws muaj tib lub kauv zoo li lub Milky Way.
Maxim Pshirkov thiab Konstantin Postnov los ntawm State Astronomical Institute. Sternberg Moscow State University ua ke nrog Valery Vasiliev, sawv cev rau lub koom haum ntawm Astronomy ntawm lub Society. Max Planck, siv cov ntaub ntawv soj ntsuam los ntawm Fermi telescope rau tag nrho xya xyoo ntawm nws lub neej (nws tau tsim nyob rau hauv 2008), lawv tau tshawb nrhiav gamma-duab tshav thaj tsam ib ncig ntawm Andromeda Nebula thiab tuaj mus rau qhov xaus tias ib tug qauv zoo ib yam li "Fermi npuas. " nyob rau hauv peb lub galaxy. Nws qhov ntev kuj tseem muaj txog 21-25 txhiab lub teeb, thiab qhov ci ntsa iab ntau dua, uas tau yooj yim piav qhia los ntawm qhov muaj lub qhov dub loj dua nyob hauv nruab nrab ntawm Andromeda. Kev soj ntsuam cov yam ntxwv ntawm cov qauv thiab emissions ntawm npuas, astrophysicists tuaj mus rau qhov xaus hais tias lawv lub hauv paus chiv keeb tsis sib haum mus rau lub annihilation ntawm tsaus teeb meem thiab kev sib cuam tshuam ntawm cosmic rays nrog teeb meem. Feem ntau yuav, qhov kev ua ntawm lub hauv paus supermassive dub qhov los yog tawg ntawm lub hnub qub tsim yog "rau liam" rau lawv tsim. Cov kws tshawb fawb hnub qub tau tshaj tawm cov txiaj ntsig ntawm lawv txoj haujlwm hauv Oxford phau ntawv xov xwm Lub Hlis Daim Ntawv Ceeb Toom ntawm Royal Astronomical Society.
Nws yuav tsum tau muab sau tseg tias kev tshawb fawb gamma hluav taws xob los ntawm cov formations yog ib qho nyuaj heev ua hauj lwm, vim hais tias nws yog masked los ntawm keeb kwm yav dhau gamma hluav taws xob los ntawm tag nrho cov lus qhia, uas tshwm sim los ntawm kev sib cuam tshuam ntawm cosmic rays hais nrog interstellar gas. Raws li muaj kev kwv yees, lub emissions los ntawm lub halo ntawm peb Galaxy tsuas yog hais txog 10% ntawm extragalactic ib. Yog li ntawd, kev tshawb nrhiav npuas hauv lwm lub galaxies xav tau kev txhim kho ntawm kev ua lej zoo heev rau kev tshem tawm cov teeb liab ntawm lub suab nrov tom qab.
Tsis tas li ntawd, astrophysicists tau tawm tswv yim tias Fermi npuas muaj nyob rau hauv tag nrho cov kauv galaxies, tab sis yav tom ntej kev soj ntsuam yuav coj qhov tseeb tseeb rau qhov teeb meem no.
Pom zoo:
Cov me nyuam ntawm Kerch, cov me nyuam ntawm Kemerovo, cov me nyuam ntawm Beslan. Yog leej txiv dag, menyuam tuag
Muaj ib qho xwm txheej hauv Kerch. Thaum Lub Kaum Hli 17, ib tug tub muaj hnub nyoog kaum yim xyoo Vladislav Roslyakov, tus tub ntxhais kawm xyoo 4 ntawm Polytechnic College, tua 20 tus neeg, raug mob ntau dua 40, thiab tua nws tus kheej. vwm vwm! - tus tswv tsev ntawm All-Lavxias teb sab TV thiab xov tooj cua tshaj tawm lub tuam txhab "60 feeb" yog obstinately hammering - ib tug yas menyuam roj hmab, uas, nyob rau hauv ib tug hlau gnashing lub suab, lub suab hais li cas cov tub ceev xwm. Rau qhov no nws thiab nws tus khub tau them nyiaj ntau heev. Qhov xwm txheej hauv Kerch yog quenched hauv kev dag
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