Kuyini ukuqhuma kwe-Supernova?
Ukuqhuma kwe-supernova kungenye yezenzakalo ezimangalisayo kakhulu esingazibona endaweni yonke. I-supernova ukuqhuma okukhulu okuphawula ukuphela kokuphila kwenkanyezi. Lesi simo asigcini nje ngokunyakazisa uhlelo lwelanga oluzungezile kodwa futhi sinikeza ukuqonda okubalulekile ngemvelaphi yezinto ezisendaweni yonke. Lesi sihloko sizoxoxa kabanzi ngokuthi ukuqhuma kwe-supernova kuyini, kwenzeka kanjani, nokuthi kungani lesi simo sibaluleke kangaka kumongo we-astrophysics kanye ne-cosmology.
Incazelo ye-Supernova
I-supernova ukuqhuma okukhulu, okukhanyayo kakhulu okwenzeka ekupheleni kokuphila kwenkanyezi. Lokhu kuqhuma kuvame ukukhanya amasonto noma izinyanga, futhi amandla abo angalingana namandla akhishwa yi-galaxy yonke. I-supernovae yenzeka lapho izinkanyezi zikhipha uphethiloli wenuzi ema-core azo futhi ziwela ngaphansi kwamandla azo adonsela phansi, noma ngokuhlanganiswa kwenkanyezi emhlophe encane nezinto ezengeziwe ezibangela ukusabela okuqhumayo kwenuzi.
Kunezinhlobo ezimbili eziyinhloko zama-supernovae ngokusekelwe ezindleleni zazo: Uhlobo I lwe-Supernovae kanye noHlobo II lwe-Supernovae.
1. Uhlobo I Supernova:
I-supernovae yohlobo lwe-I yenzeka ezinhlelweni ze-binary, lapho inkanyezi emhlophe emfushane iqoqa khona izinto ezivela kumngane wayo we-binary ozungezayo. Lapho isisindo se-white dwarf sifinyelela umkhawulo we-Chandrasekhar (cishe ngokuphindwe ka-1,4 kunesisindo seLanga), ingcindezi ye-elekthronikhi ayisakwazi ukumelana namandla adonsela phansi enkanyezini, okubangela ukuba i-white dwarf iwele futhi iqhume ngokuqhuma okukhulu kwenyukliya.
2. Uhlobo II lwe-Supernova:
I-supernovae yohlobo lwesibili yenzeka ekupheleni komjikelezo wokuphila kwenkanyezi enkulu. Izinkanyezi ezinjalo ngokuvamile zinesisindo esiphindwe kasishiyagalombili kuneLanga. Lapho uphethiloli womgogodla usuphelile, akusekho ukucindezela okwanele ukunqoba amandla adonsela phansi, ngakho-ke umgogodla uyawa, okubangela ukuqhuma okubhubhisa izendlalelo zangaphandle zenkanyezi.
Inqubo Yokwenzeka Kwe-Supernova
Inqubo yokwenzeka kwe-supernova iyahlukahluka kuye ngohlobo, kodwa ngokuvamile, izigaba zingachazwa kanje:
Uhlobo I Supernova
1. Ukwanda Kwezinto Ezibalulekile Nezincane Ezimhlophe:
– Ohlelweni oluyi-binary, i-white dwarf iqoqa izinto ezivela enkanyezini ehambisana nayo. Le nqubo yokwanda iyaqhubeka kuze kube yilapho isisindo se-white dwarf sifinyelela esilinganisweni esibucayi.
2. Ukuwa Komgogodla Nokuqhuma Kwenuzi:
– Lapho isisindo se-dwarf emhlophe sifinyelela umkhawulo we-Chandrasekhar, ama-electron aku-dwarf emhlophe awasakwazi ukumelana namandla adonsela phansi. Ngenxa yalokho, i-dwarf emhlophe iyawa, okuholela ekuphenduleni okusheshayo nokuqhuma kwe-nuclear fusion.
3. Ukukhishwa Kwamandla Nemisebe:
– Amandla akhishwa kulokhu kuqhuma makhulu kangangokuthi inkanyezi ikhanya kakhulu isikhathi esithile. Imisebe ephumayo ingafaka phakathi imisebe ye-X kanye nemisebe ye-gamma, okuhlinzeka izazi zezinkanyezi ngokuqonda okubalulekile mayelana nezinqubo zokuqhuma.
Uhlobo II lwe-Supernova
1. Ukomela Uphethiloli Wenuzi:
– Izinkanyezi ezinkulu zishisa i-hydrogen ema-core azo ngokusebenzisa i-nuclear fusion. Lapho i-hydrogen iphela, ziqala ukushisa i-helium, njalo njalo, zishisa izinto ezisindayo njenge-carbon, i-neon, ne-silicon.
2. Ukwakheka Kwe-Iron Core:
– Ekugcineni, inkanyezi yakha umongo wensimbi. Ukusabela kokuhlanganiswa kwensimbi akuvezi amandla, ngakho-ke ingcindezi eyinhloko emongo wenkanyezi iyanyamalala.
3. Ukuwa Nokuqhuma Kwamandla Adonsela Phansi:
– Ngaphandle kwengcindezi yokulwa namandla adonsela phansi, i-iron core iyawa ngokushesha okukhulu ngemizuzwana. Lokhu kubangela igagasi lokushaqeka elibhubhisa izingqimba zangaphandle zenkanyezi, okuholela ekuqhumeni kwe-supernova.
4. Imisebe Namandla:
– Ngokufana ne-Type I Supernova, lokhu kuqhuma kukhiqiza amandla amakhulu nokukhanya okukhanyayo, okuvame ukubonakala kusuka eminyakeni eyizigidi yokukhanya kude.
Ukubaluleka kwe-Supernovae ku-Cosmology
I-Supernovae idlala indima ebalulekile ekuqondeni indawo yonke kanye nezinqubo zomzimba ezikuyo. Nazi ezinye izici ezibalulekile ze-supernovae ku-cosmology:
Ukwakheka Kwezinto Ezisindayo
Ama-supernovae adlala indima ebalulekile ekubunjweni kwezinto ezisindayo endaweni yonke. Izinto ezifana nensimbi, i-nickel, ne-cobalt zakhiwa ekuqhumeni kwe-supernova futhi zisakazwa endaweni yonke. Ngaphandle kwe-supernovae, izinto ezisindayo esizithola eplanethini yoMhlaba bezingeke zakheke.
Ukwakheka Kwenkanyezi Entsha
Izinto ezikhishwa ekuqhumeni kwe-supernova zingasiza ekwakhekeni kwezinkanyezi ezintsha. Igesi nothuli olusele ngemva kokuqhuma kwe-supernova kunganikeza izakhi zokwakha izinkanyezi ezintsha namaplanethi ngaphakathi kwe-nebula.
Ithuluzi Lokulinganisa Ibanga Le-Cosmic
I-supernovae yohlobo lwe-Ia, ehlala inokukhanya okufanayo okuphezulu, isetshenziswa izazi zezinkanyezi “njengamakhandlela ajwayelekile” ukukala amabanga omkhathi. Ngokulinganisa ukukhanya esikubonayo eMhlabeni nokukuqhathanisa nokukhanya kwangempela, singanquma ibanga ukuya emithaleni ekude kakhulu.
Ukuhlola Amandla Amnyama
Ukubonwa kwe-supernovae yohlobo lwe-Ia nakho kubalulekile ekufundweni kwamandla amnyama, uhlobo lwamandla oluyimfihlakalo okucatshangwa ukuthi lubangela ukusheshisa ukwanda kwendawo yonke. Ngo-1998, ukubonwa kwe-supernovae yohlobo lwe-Ia kwaholela ososayensi bezinto ezizungezile ekutholeni ukuthi indawo yonke ayigcini nje ngokwanda, kodwa futhi iyashesha.
Ukubuka kanye nobuchwepheshe
Ubuchwepheshe besimanje buvumela izazi zezinkanyezi ukuthi zibone ama-supernovae ngemininingwane emangalisayo. Ama-telescope athuthukile kanye nezindawo zokubuka, kokubili phansi nasemkhathini, njenge-Hubble Space Telescope, anikeza umbono oningiliziwe wendlela ukuqhuma okuqhuma ngayo. Lobu buchwepheshe buvumela nokuqapha okuqhubekayo, kusiza ososayensi ukubikezela nokuqonda kangcono ukuqhuma kwama-supernova.
Isiphetho
Ukuqhuma kwe-supernova kuphakathi kwezimo zezinkanyezi ezithakazelisa kakhulu nezibaluleke kakhulu. Kusukela ezinqubweni zazo zomzimba eziyinkimbinkimbi kakhulu kuya ethonyeni lazo ekwakhekeni kwezinto ezintsha nezinkanyezi, i-supernovae idlala indima engenakuphindwa ekuguqukeni kwendawo yonke. Ucwaningo olwengeziwe lwe-supernovae alusisizi nje kuphela ukuqonda umjikelezo wokuphila kwezinkanyezi kodwa futhi luhlinzeka ngethuluzi elibalulekile lokulinganisa isikhathi sendawo yonke nokuqonda izenzakalo ezifana namandla amnyama.
Njengoba ubuchwepheshe kanye nezindlela zokubuka ziqhubeka zithuthuka, ikusasa locwaningo lwe-supernova lithembisa okutholakele okumangalisayo nakakhulu, okungase kushintshe ukuqonda kwethu indawo yonke.
