Çöküntü çemberi

HD 141943 ve HD 191089'un çevresindeki çöküntü çemberleri.[1]

Çöküntü çemberi, bir yıldızın yaşam döngüsünün farklı evrelerinde, yörüngesi çevresinde; gaz, toz, gezegenimsiler, asteroitler veya çarpışan parçacıkların halka benzeri bir şekilde birikmesidir. Bu gibi çemberler kendini şu şekillerde gösterir:

  • Birincil yıldızı çevreleyen disk, bir çoklu yıldız sistemindeki başyıldızın yörünge çemberinde bulunması.[2]
  • İkili yıldızı çevreleyen disk, ikili sistemin birinci ve ikinci yörünge çemberlerinde birlikte bulunması.
  • Yığılma diski, Neptün'ün yörüngesinin ötesinde.
  • İlkel gezegen oluşum diski, yeni oluşmuş bir yıldız çevresindeki yoğun gaz ve tozun yıldızı çevreleyen diski.
  • Enkaz diski, gezegenimsi cisimlerin yanı sıra ince toz ve bunların çarpışması ve buharlaşması sonucu ortaya çıkan az miktarda gazdan oluşur. Orijinal gaz ve küçük toz parçacıkları ise dağılmış veya gezegenlerde toplanmıştır.[3]
  • Asteroit kuşağı, Güneş Sistemi'nde Mars ile Jüpiter'in yörüngeleri arasında bulunan küçük gök cisimlerinin toplandığı bölgedir. Aynı zamanda gezegenler arası tozun kaynağıdır.
  • Edgeworth-Kuiper kuşağı, Neptün'ün yörüngesinin ötesinde.
  • Hills bulutu; sadece iç Oort bulutunun torus benzeri bir şekli vardır. Dış Oort bulutu ise daha çok küresel bir şekle sahiptir.

Ayrıca bakınız

Kaynakça

  1. ^ "Circumstellar Disks HD 141943 and HD 191089". ESA/Hubble images. 16 Ağustos 2018 tarihinde kaynağından arşivlendi. Erişim tarihi: 29 Nisan 2014. 
  2. ^ Discovery of a New Companion and Evidence of a Circumprimary Disk: Adaptive Optics Imaging of the Young Multiple System VW Chamaeleon 12 Haziran 2016 tarihinde Wayback Machine sitesinde arşivlendi., Brandeker, Alexis et al. 2001
  3. ^ Klahr, Hubert (2006). Planet Formation. Cambridge University Press. ss. 25. ISBN 0521860156. 

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