Variations in color and reflectance on the surface of asteroid (101955) Bennu.

Autor: DellaGiustina DN; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA. danidg@lpl.arizona.edu.; Department of Geosciences, University of Arizona, Tucson, AZ, USA., Burke KN; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Walsh KJ; Southwest Research Institute, Boulder, CO, USA., Smith PH; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Golish DR; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Bierhaus EB; Lockheed Martin Space, Littleton, CO, USA., Ballouz RL; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Becker TL; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Campins H; Department of Physics, University of Central Florida, Orlando, FL, USA., Tatsumi E; Instituto de Astrofísica de Canarias and Departamento de Astrofísica, Universidad de La Laguna, Tenerife, Spain.; Department of Earth and Planetary Science, University of Tokyo, Tokyo, 113-0033, Japan., Yumoto K; Department of Earth and Planetary Science, University of Tokyo, Tokyo, 113-0033, Japan., Sugita S; Department of Earth and Planetary Science, University of Tokyo, Tokyo, 113-0033, Japan., Deshapriya JDP; LESIA (Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique), Observatoire de Paris, Université PSL (Paris Sciences & Lettres), CNRS (Centre National de la Recherche Scientifique), Université de Paris, Sorbonne Université, 92195 Meudon, France., Cloutis EA; Department of Geography, University of Winnipeg, Winnipeg, MB R3B 2E9, Canada., Clark BE; Department of Physics and Astronomy, Ithaca College, Ithaca, NY, USA., Hendrix AR; Planetary Science Institute, Tucson, AZ, USA., Sen A; Department of Physics and Astronomy, Ithaca College, Ithaca, NY, USA., Al Asad MM; Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada., Daly MG; The Centre for Research in Earth and Space Science, York University, Toronto, ON, Canada., Applin DM; Department of Geography, University of Winnipeg, Winnipeg, MB R3B 2E9, Canada., Avdellidou C; Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France., Barucci MA; LESIA (Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique), Observatoire de Paris, Université PSL (Paris Sciences & Lettres), CNRS (Centre National de la Recherche Scientifique), Université de Paris, Sorbonne Université, 92195 Meudon, France., Becker KJ; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Bennett CA; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Bottke WF; Southwest Research Institute, Boulder, CO, USA., Brodbeck JI; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Connolly HC Jr; Department of Geology, Rowan University, Glassboro, NJ, USA., Delbo M; Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France., de Leon J; Instituto de Astrofísica de Canarias and Departamento de Astrofísica, Universidad de La Laguna, Tenerife, Spain., Drouet d'Aubigny CY; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Edmundson KL; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Fornasier S; LESIA (Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique), Observatoire de Paris, Université PSL (Paris Sciences & Lettres), CNRS (Centre National de la Recherche Scientifique), Université de Paris, Sorbonne Université, 92195 Meudon, France.; Institut Universitaire de France (IUF), 1 rue Descartes, 75231 Paris CEDEX 05, France., Hamilton VE; Southwest Research Institute, Boulder, CO, USA., Hasselmann PH; LESIA (Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique), Observatoire de Paris, Université PSL (Paris Sciences & Lettres), CNRS (Centre National de la Recherche Scientifique), Université de Paris, Sorbonne Université, 92195 Meudon, France., Hergenrother CW; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Howell ES; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Jawin ER; Smithsonian Institution National Museum of Natural History, Washington, DC, USA., Kaplan HH; NASA Goddard Space Flight Center, Greenbelt, MD, USA., Le Corre L; Planetary Science Institute, Tucson, AZ, USA., Lim LF; Smithsonian Institution National Museum of Natural History, Washington, DC, USA., Li JY; Planetary Science Institute, Tucson, AZ, USA., Michel P; Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France., Molaro JL; Planetary Science Institute, Tucson, AZ, USA., Nolan MC; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Nolau J; Lockheed Martin Space, Littleton, CO, USA., Pajola M; Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Padova, Padua, Italy., Parkinson A; Department of Geography, University of Winnipeg, Winnipeg, MB R3B 2E9, Canada., Popescu M; Astronomical Institute of the Romanian Academy, Bucharest, Romania.; Instituto de Astrofísica de Canarias and Departamento de Astrofísica, Universidad de La Laguna, Tenerife, Spain., Porter NA; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Rizk B; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Rizos JL; Instituto de Astrofísica de Canarias and Departamento de Astrofísica, Universidad de La Laguna, Tenerife, Spain., Ryan AJ; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Rozitis B; The School of Physical Sciences, The Open University, Milton Keynes, UK., Shultz NK; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Simon AA; NASA Goddard Space Flight Center, Greenbelt, MD, USA., Trang D; University of Hawai'i at Mānoa, Hawai'i Institute of Geophysics and Planetology, Honolulu, HI, USA., Van Auken RB; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Wolner CWV; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA., Lauretta DS; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
Jazyk: angličtina
Zdroj: Science (New York, N.Y.) [Science] 2020 Nov 06; Vol. 370 (6517). Date of Electronic Publication: 2020 Oct 08.
DOI: 10.1126/science.abc3660
Abstrakt: Visible-wavelength color and reflectance provide information about the geologic history of planetary surfaces. Here we present multispectral images (0.44 to 0.89 micrometers) of near-Earth asteroid (101955) Bennu. The surface has variable colors overlain on a moderately blue global terrain. Two primary boulder types are distinguishable by their reflectance and texture. Space weathering of Bennu surface materials does not simply progress from red to blue (or vice versa). Instead, freshly exposed, redder surfaces initially brighten in the near-ultraviolet region (i.e., become bluer at shorter wavelengths), then brighten in the visible to near-infrared region, leading to Bennu's moderately blue average color. Craters indicate that the time scale of these color changes is ~10 5 years. We attribute the reflectance and color variation to a combination of primordial heterogeneity and varying exposure ages.
(Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.)
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje