T-tipi asteroit

T-tipi asteroitler, koyu, özelliksiz ve orta derecede kırmızı spektrumlara ve 0,85 μm'ten kısa bir orta derecede soğurma özelliğine sahip, bileşimi bilinmeyen nadir iç kuşak asteroitlerinin yer aldığı bir tayf sınıfıdır. Bugüne kadar bir göktaşı türüyle doğrudan bir benzeri bulunamamıştır. Su içermedikleri düşünüldüğünde, P-tipleri veya D-tipleri veya muhtemelen oldukça bozulmuş C-tipileri ile ilişkili oldukları düşünülmektedir.

Bu sınıfta yer alan asteroit örnekleri arasında 96 Aegle, 114 Kassandra, 233 Asterope ve 308 Polyxo bulunmaktadır. İlk üçünün kızılötesi spektrumu mineral troilite benzerken, 308 Polyxo ise hidrasyon özellikleri ile modifiye edilmiştir.[1]

Hubble Uzay Teleskobu ve Neil Gehrels Swift Gözlemevi'nin ultraviyole-optik teleskopu tarafından yapılan gözlemler, daha önce T tipi olarak sınıflandırılan 596 Scheila'nın 2010 yılında yaklaşık 35 metre çapındaki bilinmeyen bir asteroit ile 5 km/s hızla çarpıştığını, bu çarpışma nedeniyle de asteroidin içinde bulunan açığa çıkmamış maddelerin açığa çıkması nedeniyle T-tipinden D-tipine dönüştüğünü göstermektedir.[2][3][4]

Ayrıca bakınız

Kaynakça

  1. ^ Britt, D. T. ; Bell, J. F. ; Haack, H. ; Scott, E. R. D. (Haziran 1992). "The Reflectance Spectrum of Troilite and the T-Type Asteroids". vol. 27, no. 3, volume 27, page 207. Meteoritics. 20 Eylül 2020 tarihinde kaynağından arşivlendi. Erişim tarihi: 27 Şubat 2023. 
  2. ^ Jewitt, David; Weaver, Harold; Mutchler, Max; Larson, Stephen; Agarwal, Jessica (20 Mayıs 2011). "HUBBLE SPACE TELESCOPE OBSERVATIONS OF MAIN-BELT COMET (596) SCHEILA". The Astrophysical Journal. 733 (1): L4. doi:10.1088/2041-8205/733/1/L4. ISSN 2041-8205. 7 Şubat 2023 tarihinde kaynağından arşivlendi. Erişim tarihi: 27 Şubat 2023. 
  3. ^ Bodewits, D.; Kelley, M. S.; Li, J.-Y.; Landsman, W. B.; Besse, S.; A’Hearn, M. F. (20 Mayıs 2011). "COLLISIONAL EXCAVATION OF ASTEROID (596) SCHEILA". The Astrophysical Journal. 733 (1): L3. doi:10.1088/2041-8205/733/1/L3. ISSN 2041-8205. 27 Şubat 2023 tarihinde kaynağından arşivlendi. Erişim tarihi: 27 Şubat 2023. 
  4. ^ Hasegawa, Sunao; Marsset, Michaël; DeMeo, Francesca E.; Bus, Schelte J.; Ishiguro, Masateru; Kuroda, Daisuke; Binzel, Richard P.; Hanuš, Josef; Nakamura, Akiko M.; Yang, Bin; Vernazza, Pierre (1 Ocak 2022). "The Appearance of a "Fresh" Surface on 596 Scheila as a Consequence of the 2010 Impact Event". The Astrophysical Journal Letters. 924 (1): L9. doi:10.3847/2041-8213/ac415a. ISSN 2041-8205. 27 Şubat 2023 tarihinde kaynağından arşivlendi. Erişim tarihi: 27 Şubat 2023. 

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