I-Laser Interferometer isithuba Umsebenzi we-Antenna (LISA) ufumene ukuhamba phambili kweYurophu isithuba I-Arhente (ESA). Oku kuvula indlela yokuphuhlisa izixhobo kunye ne-spacecrafts eqala ngoJanuwari 2025. I-mission ikhokelwa yi-ESA kwaye isiphumo sentsebenziswano phakathi kwe-ESA, iLizwe leLungu layo. isithuba iiarhente, NASA, kunye nemanyano yamazwe ngamazwe yoososayensi.
Icwangciselwe ukusungulwa ngo-2035, i-LISA iya kuba yeyokuqala isithuba-siseko iliza lomxhuzulane observatory ezinikezelwe ubhaqo kunye nokufunda millihertz ripples ezibangelwa ukugqwetheka kwilaphu isithuba- ixesha (amaza omxhuzulane) ngapha nangapha yonke.
Ngokungafaniyo nomhlaba osekelwe iliza lomxhuzulane iidetectors (LIGO, VIRGO, KAGRA, kunye ne-LIGO India) ezibhaqa amaza omxhuzulane kwi-frequency range ye-10 Hz ukuya kwi-1000 Hz, i-LISA iya kuyilwa ukuba ibone amaza omxhuzulane yobude bamaza amade kakhulu kuluhlu lwamaza aphantsi phakathi kwe-0.1 mHz kunye ne-1 Hz.
Ubuninzi obusezantsi kakhulu (10-9-10-8 Hz) amaza omxhuzulane (GWs) ezinobude obusuka kwiiveki ukuya kwiminyaka ukusuka kwibinary enkulu imingxunya emnyama inokufunyanwa kusetyenziswa umhlaba I-Pulsar Timing Arrays (i-PTAs). Nangona kunjalo, i-frequency ephantsi amaza omxhuzulane (GWs) kunye ne-frequency phakathi kwe-0.1 mHz kunye ne-1 Hz ayinakubonwa yi-LIGO okanye yi-Pulsar Timing Arrays (PTAs) - ubude bezi GWs bude kakhulu kwi-LIGO kwaye bufutshane kakhulu ukuba i-PTA ibonwe. Ngoko ke, imfuneko isithuba-esekelwe kwi-GW detector.
I-LISA iya kuba liqela leenkwenkwezi ezithathu ekwenziweni konxantathu olinganayo esithubeni. Icala ngalinye likanxantathu liya kuba yi-2.5 yezigidi zeekhilomitha ubude. Oku kumila (kweziphekepheke ezithathu) kuya kuthi ukuhamba Ilanga kwi-heliocentric elandela umhlaba ukuhamba phakathi kwe-50 kunye ne-65 yezigidi zeekhilomitha ukusuka eMhlabeni ngelixa ugcina umgama ophakathi kokwahlukana kweziphekepheke ozizigidi ezi-2.5 km. Olu lungelelwaniso lusekwe emajukujukwini lwenza i-LISA ibe sisixhobo esikhulu kakhulu sokufunda amaza aphantsi amaza omxhuzulane ukuba ii-detectors ezisekelwe emhlabeni azikwazi.
Ukukhangela ii-GWs, i-LISA iya kusebenzisa izibini zobunzima bovavanyo (iityhubhu eziqinileyo zegolide-yeplatinam) ezidadayo simahla kumagumbi akhethekileyo kumbindi wenqanawa nganye. Umxhuzulane iiripples ziya kwenza utshintsho oluncinci kakhulu kumgama ophakathi kovavanyo oluninzi kwiziphekepheke eziya kulinganiswa ngelaser interferometry. Njengoko kubonisiwe ngu-LISA Pathfinder mission, obu bugcisa buyakwazi ukulinganisa utshintsho kwimigama ukuya kwiibhiliyoni ezimbalwa zemilimitha.
I-LISA iya kubhaqa ii-GW ezibangelwa kukudityaniswa kwe-supermassive imingxunya emnyama kumbindi weminyele ngaloo ndlela kuya kukhanyisela ngendaleko yeminyele. Uthumo kufuneka luchonge umxhuzulane oqikelelweyo 'ikhala' yenziwe kwimizuzu yokuqala ye yonke kwimizuzwana yokuqala emva kwesithonga esikhulu.
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Iingxelo:
- ESA. Iindaba -Ukubamba amaza exesha lasemajukujukwini: U-LISA uya phambili. Ithunyelwe nge-25 kaJanuwari 2024. Iyafumaneka e https://www.esa.int/Science_Exploration/Space_Science/Capturing_the_ripples_of_spacetime_LISA_gets_go-ahead
- NASA. LISA. Ifumaneka e https://lisa.nasa.gov/
- Pau Amaro-Seoane et al. 2017. Laser Interferometer isithuba I-antenna. Ukuprintwa kwangaphambili kwe-arXiv. DOI: https://doi.org/10.48550/arXiv.1702.00786
- Baker et al. 2019. I-Laser Interferometer isithuba I-Antenna: Ukutyhilwa kweMillihertz Gravitational Wave Sky. Ukuprintwa kwangaphambili kwe-arXiv. DOI: https://doi.org/10.48550/arXiv.1907.06482
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