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LISA Mission: Space-based Gravitational Wave detector inowana ESA kumberi 

Iyo Laser Interferometer nzvimbo Antenna (LISA) mishoni yakagamuchira kuenda mberi kweEuropean nzvimbo Agency (ESA). Izvi zvinogadzira nzira yekugadzira zviridzwa uye spacecrafts kutanga Ndira 2025. Basa iri rinotungamirwa neESA uye mhedzisiro yekudyidzana pakati peESA, iyo Nhengo yeNyika. nzvimbo masangano, NASA, uye mubatanidzwa wepasi rose wemasayendisiti.   

Yakarongerwa kutangwa muna 2035, LISA ichave yekutanga nzvimbo-based giravitational wave Observatory yakatsaurirwa kuona uye kudzidza millihertz ripples inokonzerwa nekukanganiswa mumucheka we nzvimbo- nguva (masaisai egiravhiti) mhiri kwe muchadenga.  

Kusiyana nevhu rakavakirwa giravitational wave ma detectors (LIGO, VIRGO, KAGRA, uye LIGO India) anoona masaisai egiravhiti muhuwandu hwehuwandu hwe10 Hz kusvika ku1000 Hz, LISA ichagadzirirwa kuona masaisai egiravhiti yewavelengths akareba mune yakaderera frequency renji pakati pe0.1 mHz uye 1 Hz.  

Ultra-yakaderera-frequency (10-9-10-8 Hz) masaisai egiravhiti (GWs) ine wavelengths kubva kumavhiki kusvika kumakore kubva kune supermassive binary maburi matema inogona kuonekwa pachishandiswa pasi-based Pulsar Timing Arrays (PTAs). Nekudaro, yakaderera frequency masaisai egiravhiti (GWs) ine frequency pakati pe0.1 mHz ne1 Hz haigone kuonekwa neLIGO kana nePulsar Timing Arrays (PTAs) - kureba kwemaGW aya kwakarebesa kuti LIGO uye ipfupi kuti PTAs ione. Nokudaro, kudiwa kwe nzvimbo-yakavakirwa GW detector.  

LISA ichave nyeredzi yezvitundumuseremusere zvitatu mukuumbwa kwakaenzana kwemakona matatu muchadenga. Rutivi rumwe norumwe rwegonyo yacho ruchareba 2.5 miriyoni km. Kuumbwa uku (kwezvitatu zvemuchadenga) kuchadaro Orbit Zuva muNyika-inotevera heliocentric Orbit pakati pe50 ne 65 miriyoni km kubva kuPasi uku uchichengetedza kureba kwepakati-muchadenga kupatsanurwa chinhambwe che 2.5 miriyoni km. Iyi nzvimbo-yakavakirwa kumisikidzwa inoita kuti LISA ive detector yakakura kwazvo yekudzidza yakaderera frequency masaisai egiravhiti kuti pasi-based detectors haigone.  

Kuti uone maGWs, LISA ichashandisa mapeya ebvunzo mamese (yakasimba goridhe-platinamu cubes) inoyangarara-yakasununguka mumakamuri akakosha pamwoyo wechitundumuseremusere chega chega. Giravhiti ma ripples achaita shanduko diki zvakanyanya mumadaro ari pakati pemayedzo masasi muspacecrafts ayo anozoyerwa kuburikidza nelaser interferometry. Sezvinoratidzwa neLISA Pathfinder mission, tekinoroji iyi inokwanisa kuyera shanduko mumadaro kusvika kumabhiriyoni mashoma emamirimita. 

LISA ichaona maGW akakonzerwa nekubatanidzwa kwe supermassive maburi matema pakati pemakwara enzou nokudaro pachajekesa kushanduka-shanduka kwemapoka enyeredzi. Mishoni inofanirawo kuona giravhiti yakafanotaurwa 'kurira' yakagadzirwa munguva dzekutanga dze muchadenga mumasekonzi ekutanga mushure mekuputika kukuru.  

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References:  

  1. ESA. Nhau -Kutora ma ripples emuchadenga: LISA anoenda kumberi. Yakatumirwa musi wa25 Ndira 2024. Inowanikwa pa https://www.esa.int/Science_Exploration/Space_Science/Capturing_the_ripples_of_spacetime_LISA_gets_go-ahead 
  1. NASA. LISA. Inowanikwa pa https://lisa.nasa.gov/ 
  1. Pau Amaro-Seoane et al. 2017. Laser Interferometer nzvimbo Antenna. Preprint arXiv. DOI: https://doi.org/10.48550/arXiv.1702.00786  
  1. Baker et al. 2019. Iyo Laser Interferometer nzvimbo Antenna: Kuzarura iyo Millihertz Gravitational Wave Sky. Preprint arXiv. DOI: https://doi.org/10.48550/arXiv.1907.06482 

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Philippe Jetzer, Yunivhesiti yeZurich

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Kugadzirisa zvakavanzika zvikuru zvepasirese - naGianfranco Bertone


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Umesh Prasad
Umesh Prasad
Mutori wenhau weSainzi | Muvambi mupepeti, magazini yeScientific European

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