Evidence for a source of H chondrites in the outer main asteroid belt
| العنوان: | Evidence for a source of H chondrites in the outer main asteroid belt |
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| المؤلفون: | Dan Alin Nedelcu, D. Pricopi, Marcel Popescu, Octavian Badescu, Mirel Birlan |
| المساهمون: | 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), 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: | Astronomy and Astrophysics-A&A Astronomy and Astrophysics-A&A, 2014, 567, pp.L7. ⟨10.1051/0004-6361/201423949⟩ Astronomy and Astrophysics-A&A, EDP Sciences, 2014, 567, pp.L7. ⟨10.1051/0004-6361/201423949⟩ |
| بيانات النشر: | HAL CCSD, 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | Physics, [PHYS]Physics [physics], Potentially hazardous object, Astronomy, Astronomy and Astrophysics, Astrophysics, Parent body, Jupiter, Meteorite, 13. Climate action, Space and Planetary Science, Chondrite, Asteroid, [SDU]Sciences of the Universe [physics], Asteroid belt, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], ComputingMilieux_MISCELLANEOUS, Ordinary chondrite |
| الوصف: | Aims. In this paper we report near-infrared spectroscopic observations of one of the largest potentially hazardous asteroids, (214869) 2007 PA8. Mineralogical analysis of this object was followed by the investigation of the dynamical delivery mechanism from its probable source region, based on long-term numerical integrations. Methods. The spectrum of (214869) 2007 PA8 was analysed using the positions of 1 μ ma nd 2μm bands and by curve-matching with RELAB meteorites spectra. Its dynamical evolution was investigated by means of a 200 000-year numerical integration in the past of 1275 clones followed to the source region. Results. (214869) 2007 PA8 has a very young surface with a composition more akin to H chondrites than to any other type of ordinary chondrite. It arrived from the outer Main Belt in the near-Earth space via the 5:2 mean motion resonance with Jupiter by eccentricity pumping. Identification of its source region far from (6) Hebe raises the possibility of the existence of a second parent body of the H chondrites that has a radically different post-accretion history. Future spectroscopic surveys in the 5:2 resonance region will most likely discover other asteroids with an H chondrite composition. |
| اللغة: | English |
| تدمد: | 0004-6361 |
| DOI: | 10.1051/0004-6361/201423949⟩ |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a04fc40cf1cfcf000516de9c75e15d6 https://hal.science/hal-02611698/file/aa23949-14.pdf |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....2a04fc40cf1cfcf000516de9c75e15d6 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00046361 |
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| DOI: | 10.1051/0004-6361/201423949⟩ |