Resolved spectroscopy of Mercury in the near-IR with SpeX/IRTF
| العنوان: | Resolved spectroscopy of Mercury in the near-IR with SpeX/IRTF |
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| المؤلفون: | Dan Alin Nedelcu, E. Volquardsen, Mirel Birlan, Stéphane Erard, Pierre Vernazza, Francesca E. DeMeo, Alain Doressoundiram |
| المساهمون: | Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Fundació Privada Observatori Esteve Duran, Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC) |
| المصدر: | Icarus Icarus, 2010, 209 (1), pp.125-137. ⟨10.1016/j.icarus.2009.12.010⟩ Icarus, Elsevier, 2010, 209 (1), pp.125-137. ⟨10.1016/j.icarus.2009.12.010⟩ |
| بيانات النشر: | HAL CCSD, 2010. |
| سنة النشر: | 2010 |
| مصطلحات موضوعية: | Solar System, Materials science, 010504 meteorology & atmospheric sciences, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], chemistry.chemical_element, Mineralogy, engineering.material, 01 natural sciences, Space weathering, Spectral line, Optics, 0103 physical sciences, Spectroscopy, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Olivine, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], business.industry, Astronomy and Astrophysics, Mercury (element), chemistry, 13. Climate action, Space and Planetary Science, [SDU]Sciences of the Universe [physics], engineering, Lunar soil, business |
| الوصف: | International audience; We present resolved near-infrared spectra of Mercury scanning 70% of the surface in latitude and longitude from three separate observations, allowing us to perform a compositional investigation of its surface. By scanning the surface we find that all spectra in our sample are remarkably similar suggesting overall compositional homogeneity. We do, however, observe a slope difference between the spectra. These slope changes are most likely due to differences in the emission angle over different parts of the surface. We confirm the presence of a 1.1 lm feature that had been previously detected (Warell, J. et al. [2006]. Icarus 180, 281-291) and attributed to Ca-rich clinopyroxene. Finally, we investigated Mercury's surface composition by comparing its spectrum with ground-based lunar spectra, lunar soil spectra collected in the laboratory, and analysis with a simple linear mixing model using various minerals as end-members. The result of this compositional investigation reveals that Mercury's surface composition is likely to be quite different from the Moon's. While low-Ca iron-rich pyroxenes are main surface components on the Moon (abundance varying from $5% to $35%), their abundance on Mercury may not exceed 5%. We also find that a Ca-rich clinopyroxene (in the hedenbergite-diopside series) is likely to be a main component of Mercury's surface whereas this mineral is almost absent on the Moon. Our analysis also suggests the possible presence of olivine. We find that Mercury's slope is less red than that of the Moon, in agreement with results from MESSENGER (McClintock, W.E., and 12 colleagues [2008]. Science 321, 62-65), and composition rather than variation of space weathering is likely the cause of this difference. |
| اللغة: | English |
| تدمد: | 0019-1035 1090-2643 |
| DOI: | 10.1016/j.icarus.2009.12.010⟩ |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a78733f4b7927f4e8e69d744d5c4376a https://hal.science/hal-02347513 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....a78733f4b7927f4e8e69d744d5c4376a |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00191035 10902643 |
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| DOI: | 10.1016/j.icarus.2009.12.010⟩ |