Thaum lub Tsib Hlis 2023, tsis ntev tom qab LIGO (Laser Interferometer Gravitational-wave Observatory) tig rov qab rau nws qhov kev soj ntsuam thib plaub, nws tau kuaj pom ib qho gravitational-yoj teeb liab los ntawm kev sib tsoo ntawm ib yam khoom, feem ntau yuav yog lub hnub qub neutron, nrog rau qhov xav tias lub qhov dub muaj qhov loj uas yog 2.5 txog 4.5 npaug ntau dua li ntawm peb lub hnub.
Cov teeb liab no, hu ua GW230529, yog qhov txaus siab rau cov kws tshawb fawb vim tias tus neeg sib tw lub qhov dub qhov loj poob rau hauv qhov hu ua qhov sib txawv ntawm cov hnub qub uas hnyav tshaj plaws uas paub cov hnub qub neutron, uas yog me ntsis ntau dua ob lub hnub ci, thiab lub teeb pom kev dub qhov, uas yog hais txog. tsib hnub ci pawg. Txawm hais tias lub teeb liab gravitational yoj ib leeg tsis tuaj yeem qhia qhov tseeb ntawm cov khoom no, kev tshawb pom yav tom ntej ntawm cov xwm txheej zoo sib xws, tshwj xeeb tshaj yog cov uas nrog lub teeb tawg, tuaj yeem tuav tus yuam sij los teb cov lus nug ntawm seb qhov hnyav dub yuav ua li cas.
Daim duab qhia tau hais tias kev sib koom ua ke thiab kev sib koom ua ke ntawm qhov qis-qhov sib txawv ntawm qhov dub (qhov tsaus nti grey) nrog lub hnub qub neutron (zoo heev tidally deformed los ntawm lub qhov dub lub ntiajteb txawj nqus). Daim duab tseem ceeb no los ntawm kev sib koom ua ke ua kom pom tseeb tsuas yog lub hnub qub neutron qhov qis qis, xws li 60 grams ib cubic centimeter (xiav tsaus) txog 600 kilograms ib cubic centimeter (dawb). Nws cov duab qhia txog qhov muaj zog deformations ntawm cov khoom siv qis ntawm lub hnub qub neutron. Duab Credit: Ivan Markin, Tim Dietrich (University of Potsdam), Harald Paul Pfeiffer, Alessandra Buonanno (Max Planck Institute for Gravitational Physics)
Jenne Driggers (PhD '15), hais tias Jenne Driggers (PhD 'XNUMX), tus kws tshawb fawb ua thawj coj ntawm LIGO Hanford hauv Washington, ib qho ntawm ob qhov chaw, nrog rau LIGO Livingston hauv Louisiana, uas ua rau LIGO Observatory.
LINK ua keeb kwm hauv 2015 tom qab nqa tawm thawj qhov kev tshawb pom ncaj qha ntawm gravitational tsis nyob hauv qhov chaw. Txij thaum ntawd los, LIGO thiab nws tus khub detector nyob rau hauv Teb chaws Europe, Virgo, tau kuaj pom ze li ntawm 100 mergers ntawm lub qhov dub, ib txhais tes ntawm neutron hnub qub, nrog rau kev sib koom ua ke ntawm neutron hnub qub thiab qhov dub. Lub Japanese detector KAGRA koom nrog lub gravitational-yoj tes hauj lwm nyob rau hauv 2019, thiab pab neeg ntawm cov kws tshawb fawb uas sib sau ua ke soj ntsuam cov ntaub ntawv los ntawm tag nrho peb cov detectors hu ua LIGO-Virgo-KAGRA (LVK) kev koom tes. Lub LIGO cov chaw soj ntsuam tau txais nyiaj los ntawm National Science Foundation (NSF), thiab tau tsim, tsim, thiab ua haujlwm los ntawm Caltech thiab MIT.
Qhov kev tshawb pom tshiab tseem qhia tau hais tias kev sib tsoo uas muaj qhov sib sib zog nqus qhov dub yuav muaj ntau dua li qhov kev ntseeg yav dhau los.
"Qhov kev kuaj pom no, thawj peb qhov txiaj ntsig zoo siab los ntawm qhov thib plaub LIGO-Virgo-KAGRA kev soj ntsuam kev khiav, qhia tias tej zaum yuav muaj kev sib tsoo ntau dua ntawm cov hnub qub neutron thiab cov qhov dub qis dua li peb tau xav," hais Jess McIver, tus kws tshaj lij ntawm University of British Columbia, tus kws tshaj lij ntawm LIGO Kev Tshawb Fawb Kev Sib Koom Tes, thiab yav dhau los tus kws kho mob tom qab ntawm Caltech.
Ua ntej qhov kev tshwm sim GW230529, ib qho kev nthuav dav ntawm pawg neeg sib tw cov khoom tau raug txheeb xyuas. Hauv qhov xwm txheej ntawd, uas tau tshwm sim thaum Lub Yim Hli 2019 thiab hu ua GW190814, a Cov khoom cog ntawm 2.6 hnub ci pawg tau pom raws li ib feem ntawm kev sib tsoo cosmic, tab sis cov kws tshawb fawb tsis paub meej tias nws yog lub hnub qub neutron lossis lub qhov dub.
Tom qab so rau kev saib xyuas thiab kev hloov kho tshiab, cov neeg kuaj xyuas plaub qhov kev soj ntsuam yuav rov pib dua thaum lub Plaub Hlis 10, 2024, thiab yuav txuas ntxiv mus txog Lub Ob Hlis 2025.
Sau los ntawm Whitney Clavin
Tau qhov twg los: Caltech
