Cov kws saib hnub qub tshawb pom qhov chaw nyob ntawm galaxies tsis yooj yim

Cov kws saib hnub qub tshawb pom qhov chaw nyob ntawm galaxies tsis yooj yim
Cov kws saib hnub qub tshawb pom qhov chaw nyob ntawm galaxies tsis yooj yim
Anonim

Ultradiffuse galaxies, lossis UDGs, yog cov galaxies ntsiag to nrog cov hnub qub tawg thoob plaws qhov chaw dav. Xws li galaxies muaj lub teeb ci qis heev - nws nyuaj rau pom lawv hauv qhov chaw.

Txoj kev tshawb fawb no tau ua los ntawm pab pawg thoob ntiaj teb ntawm cov kws tshawb fawb coj los ntawm Laura Sayles, tus kws saib hnub qub hauv University of California. Cov kws tshaj lij tau siv khoos phis tawj simulation thiab cov ntaub ntawv ntawm "extinct" ultradiffuse galaxies tau txais ua tsaug rau lub tsom iav muaj zog.

"Dab tsi peb tau pom qhov tsis sib thooj ntawm kev xav ntawm kev tsim galaxy, vim tias feem ntau lawv yuav tsum yog nyob hauv pab pawg lossis pab pawg, yog li tsis ntev los sis tom qab kev cuam tshuam ntawm cov neeg nyob ze yuav ua rau cov pa tawm thiab tshem tawm lub hnub qub tsim," Phys.org hais tias. Lub caij no, ultradiffuse galaxies pom los ntawm cov kws tshawb fawb tau cais tawm ntawm lwm tus.

Sab laug yog ib qho ntawm ultradiffuse galaxies tau tshuaj xyuas thaum simulation. Ntawm sab xis yog daim duab yuav luag pob tshab ntawm DF2 galaxy. Duab: ESA / Hubble

Nrog kev pab los ntawm kev sim sim, cov kws tshawb fawb tau taug txoj kev hloov pauv ntawm "tua" UDGs. Lawv tau kawm tias ntau ntawm lawv yeej tsis tau tsim ua pawg thiab ntau txhiab xyoo dhau los yog lub hnub qub ntawm cov kab ke loj dua. Tom qab ntawd qee qhov laj thawj (nws tseem tsis tau paub tias yog vim li cas) lawv raug pov rau hauv qhov chaw ncig lub elliptical, yog li tam sim no lawv nyob deb li cas.

Cov kws tshawb fawb tseem tshaj tawm tias cais cov hnub qub galaxies tuaj yeem suav txog 25% ntawm tag nrho cov pejxeem ultradiffuse. Kev soj ntsuam tam sim no qhia pom qhov tshwm sim me dua. Qhov no txhais tau tias ntau lub galaxies uas txaus nyiam tseem tsis tau pom los ntawm leej twg, thiab nws yog lub sijhawm ua ntej cov kws tshawb fawb hnub qub pom lawv.

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