NIRS3 spectral analysis of the artificial Omusubi-Kororin crater on Ryugu

DOI PDF PDF 参考文献34件
  • A Galiano
    INAF-IAPS , 00133 Rome, Italy
  • E Palomba
    INAF-IAPS , 00133 Rome, Italy
  • F Dirri
    INAF-IAPS , 00133 Rome, Italy
  • A Longobardo
    INAF-IAPS , 00133 Rome, Italy
  • K Kitazato
    University of Aizu , Aizu-Wakamatsu, Fukushima 965-8580, Japan
  • T Iwata
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency , Sagamihara 252-5210, Japan
  • M Matsuoka
    Geological Survey of Japan (GSJ), National Institute of Advanced Industrial Science and Technology (AIST) , Ibaraki 305-8567, Japan
  • T Hiroi
    Department of Earth, Environmental and Planetary Sciences, Brown University , Providence, RI 02912, USA
  • D Takir
    Jacobs/NASA Johnson Space Center , Houston, TX 77058, USA
  • T Nakamura
    Tohoku University , Miyagi 980-8577, Japan
  • M Abe
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency , Sagamihara 252-5210, Japan
  • M Ohtake
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency , Sagamihara 252-5210, Japan
  • S Matsuura
    Kwansei Gakuin University , Hyogo 662-8501, Japan
  • S Watanabe
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency , Sagamihara 252-5210, Japan
  • M Yoshikawa
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency , Sagamihara 252-5210, Japan
  • T Saiki
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency , Sagamihara 252-5210, Japan
  • S Tanaka
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency , Sagamihara 252-5210, Japan
  • T Okada
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency , Sagamihara 252-5210, Japan
  • Y Yamamoto
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency , Sagamihara 252-5210, Japan
  • Y Takei
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency , Sagamihara 252-5210, Japan
  • K Shirai
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency , Sagamihara 252-5210, Japan
  • N Hirata
    University of Aizu , Aizu-Wakamatsu, Fukushima 965-8580, Japan
  • K Matsumoto
    National Astronomical Observatory of Japan , Mitaka 181-8588, Japan
  • Y Tsuda
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency , Sagamihara 252-5210, Japan

書誌事項

公開日
2022-06-27
資源種別
journal article
権利情報
  • https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model
DOI
  • 10.1093/mnras/stac1547
公開者
Oxford University Press (OUP)

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説明

<jats:title>ABSTRACT</jats:title> <jats:p>The JAXA Hayabusa2 mission accomplished the formation of an artificial crater on the asteroid Ryugu. The aim of this work is to analyse the area surrounding the artificial crater and reveal spectral variability compared to the same region before the crater formation, to mineralogically and physically characterize the subsurface exposed material. The crater’s investigation focused on the analysis of two regions corresponding to the inner part of crater (the pit and the crater wall/floor), two areas related to ejecta deposited close to the crater, two areas of ejecta moved far from the crater, and two external areas. Each area was investigated both before and after the crater formation, by the study of the photometrically corrected spectral parameters: the 1.9 $\mu$m reflectance, the near-infrared spectral slope, and the depth of the bands at 2.7 and 2.8 $\mu$m. The subsurface material of the post-crater areas shows deeper absorption bands, a decrease in reflectance, and a reddening in spectral slope with respect to the surface material of pre-crater areas. The subsurface regolith could have experienced a lower OH devolatilization due to space weathering and/or could be composed of finer dark grains than the surface layer. The ejecta reached distances of $\sim $20 m from the impact point, mainly moving in the northern direction; nevertheless, a few ejecta also reached the south-eastern part of crater.</jats:p>

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