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Showing 1–7 of 7 results
Advanced filters: Author: D. Takir Clear advanced filters

  • A statistical study of the ~2.7 µm hydration band in the Ryugu samples shows that Ryugu’s immediate subsurface has not been exposed to space weathering and that even the pristine CI chondrites exhibit terrestrial contamination, making the Hayabusa2 samples a reference for primitive water abundance in carbonaceous asteroids.

    • T. Le Pivert-Jolivet
    • R. Brunetto
    • S. Watanabe
    Research
    Nature Astronomy
    Volume: 7, P: 1445-1453

  • The large, low-albedo asteroids in the main belt between 3.0 au and 3.4 au share spectral characteristics and history with Ceres. Accreted in different parts of the outer Solar System, they might have been implanted into the main belt by the dynamic upheaval created by the giant planets’ instability.

    • Driss Takir
    • Wladimir Neumann
    • Mario Trieloff
    Research
    Nature Astronomy
    Volume: 7, P: 524-533

  • Infrared spectra of (1) Ceres acquired at distances of 82,000 to 4,300 kilometres from the surface indicate widespread ammoniated phyllosilicates; the presence of ammonia suggests that material from the outer Solar System was incorporated into Ceres.

    • M. C. De Sanctis
    • E. Ammannito
    • C. T. Russell
    Research
    Nature
    Volume: 528, P: 241-244

  • Signatures of phyllosilicate-like hydrated minerals are widespread on Bennu’s surface, indicating significant aqueous alteration. The lack of spatial variations in the spectra down to the scale of ~100 m indicates both a relatively uniform particle size distribution and a lack of compositional segregation, possibly due to surficial redistribution processes.

    • V. E. Hamilton
    • A. A. Simon
    • B. Marty
    Research
    Nature Astronomy
    Volume: 3, P: 332-340

  • Hayabusa2 created an artificial crater on Ryugu to analyse the subsurficial material of the asteroid. Results show that the subsurface is more hydrated than the surface. It experienced alteration processes that can be traced back to Ryugu’s parent body.

    • K. Kitazato
    • R. E. Milliken
    • Y. Tsuda
    Research
    Nature Astronomy
    Volume: 5, P: 246-250

  • Samples returned from Ryugu contain fresher material than the space weathered outer asteroid surface observed by remote sensing, according to a comparison of spectral data from returned samples, orbital observations and Murchison meteorite samples.

    • Moe Matsuoka
    • Ei-ichi Kagawa
    • Yuichi Tsuda
    ResearchOpen Access
    Communications Earth & Environment
    Volume: 4, P: 1-12

  • A refined analysis of infrared observations of comet 67P/Churyumov–Gerasimenko from the VIRTIS instrument on board the Rosetta spacecraft has revealed the presence of aliphatic organic molecules on the comet nucleus.

    • A. Raponi
    • M. Ciarniello
    • C. Leyrat
    Research
    Nature Astronomy
    Volume: 4, P: 500-505