Kreutz sungrazer
A Kreutz sungrazers ( /k r ɔɪ t s /   ( link=| Game da wannan sauti  / )  , Furta kroits) iyalai ne na sungrazing comets, halin da falakinsu shan su musamman kusa ga Rana a perihelion. anyi ĩmãni ya zama wani ɓaɓɓake daga daya manyan tauraro mai wutsiya cewa karya up tun shekaru da yawa da aka mai suna a gare Jamus falakin Heinrich Kreutz, wanda da farko ya nuna cewa an alaka.  A Kreutz sungrazers ta aphelion ne game da 170 AU daga Sun; Wadannan sungrazer suna tafiya daga nesa zuwa Tsarin Hasken rana daga wani yanki a cikin sararin sama a Canis Major, zuwa Tsarin Haske na ciki, zuwa matakin da ke kusa da Rana, sannan kuma su bar Tsarin Haske na ciki yayin dawowar su zuwa matattarar su. 

Dayawa daga cikin dangin Kreutz sun zama manyan kade-kade, a wasu lokutan ana iya ganinsu kusa da Rana a cikin sararin samaniya. Wanda ya fi kwanannan daga cikinsu shine Comet Ikeya – Seki a shekarar 1965, wanda kuma wataƙila ya kasance ɗayan fitattun comets masu haske a cikin karni na ƙarshe.  An ba da shawarar cewa wani gungu na kayan kreutz tsarin kwalliya na iya fara zuwa Tsarin Hasken rana a cikin shekaru masu zuwa zuwa shekaru masu zuwa.  

Yawancin ɗaruruwan membersan dangi, wasu ma 'yan kaxan kaɗan ne kawai, an gano su tun bayan ƙaddamar da tauraron dan adam din na SOHO a 1995. Babu ɗayan waɗannan ƙananan waƙaƙanin waƙoƙin da suka tsira daga matsanancin yanayin da ke ciki. Manyan jujjuyawa kamar Babban Comet na 1843 da C / 2011 W3 (Lovejoy) sun tsira daga tsallakewar wucewar su. Masana ilimin sararin samaniya sun yi nasara wajen gano kreutzet ɗin kreutz a cikin bayanan da suke samu a ainihin lokacin ta hanyar Intanet.

Ganowa da lura da tarihi 

comet na farko wacce aka gano kewayarta yakaita kusa da Rana shine Babban Comet na 1680 . An gano wannan comet ɗin ya wuce 200,000   km (0.0013)   AU ) sama da saman Rana, daidai yake da kusan bakwai na diamita na Sun, ko kusan rabin nisan da ke tsakanin Duniya da Wata. Ta haka ne ya zama ta farko da aka fi sani da rudani. Nisansa yai daidai da 1.3 hasken rana. 

Masana ilimin sararin samaniya a lokacin, ciki har da Edmond Halley, sun yi hasashen cewa wannan tauraro ya kasance wani sabon tauraro mai wutsiya wanda aka gani kusa da Rana a sararin sama a shekara ta 1106.  Shekaru 163 daga baya, Babban Comet na 1843 ya bayyana kuma ya wuce zuwa kusa da Rana. Duk da lissafin orbital wanda ke nuna cewa yana da lokacin ƙarni da yawa, wasu masanan kimiyyar sararin samaniya suna tunanin ko dawowar waƙoƙin 1680 ne. Wani comet mai haske wanda aka gani a shekarar 1880 an gano yana tafiya kusa da na 1843, kamar yadda Babban Comet na 1882 ya biyo baya. Wasu masanan ilmin taurari sun ba da shawarar cewa wataƙila duk ɗayarsu ɗaya ce, wanda lokacin haihuwar sa ya kasance taqaitaccen gajartawa a kowane yanki na lalacewa, wataƙila ta hanyar jigilar abubuwa ne da ke kewaye da Rana.

Nan gaba 
A taqaice, za a iya ci gaba da binciken sraraz din Kreutz a matsayin dangi na musamman don dubban shekaru da yawa tukuna. Daga karshe za'a rarraba filayensu ta hanyar matsanancin hankali, kodayake ya danganta da yawan gundarin sassan sassan, za'a iya lalata rukunin gaba daya kafin a tarwatsa shi a hankali.  Babu ci gaba da gano yawancin mutane na dangin dan kungiyar ta hanyar SOHO to babu shakka zai kai ga samun kyakkyawar fahimtar yadda Comets ke tashi dan samar da dangi.  

Ba zai yiwu a kiyasta damar wani babban tauraro mai suna Kreutz da ke zuwa a nan gaba ba, amma ganin cewa a kalla 10 sun kai ga tsiraicin ido a cikin shekaru 200 da suka gabata, wani babban mawaki daga dangin Kreutz ya kusan tabbas tabbas ya isa wani matsayi.  Comet White-Ortiz – Bolelli a shekarar 1970 ya kai ga alama girma 1. A cikin Disamba 2011, Kreutz sungrazer C / 2011 W3 (Lovejoy) ya tsira daga matsanancin yanayin kuma yana da alamun girman −3.

Duba kuma 

 Jerin Rungunan Kreutz

Manazarta

Karin karatu 

 Marsden BG (1989), The Sungrazing Comets Revisited, Asteroids, comets, meteors III, Ayyukan gamuwa (AMC 89), Uppsala: Universitet, 1990, eds CI Lagerkvist, H. Rickman, BA Lindblad., P.   393 
 Lee, Sugeun; Yi, Yu; Kim, Yong Ha; Brandt, John C. (2007). "Distribution of Perihelia for SOHO Sungrazing Comets and the Prospective Groups". Journal of ilimin taurari da sararin samaniya . 24 (3): 227–234. Bibcode : 2007JASS ... 24..227L . doi : 10.5140 / JASS.2007.24.3.227 .