Electronic Resource
Evidence for multi-fragmentation and mass shedding of boulders on rubble-pile binary asteroid system (65803) Didymos
| العنوان: | Evidence for multi-fragmentation and mass shedding of boulders on rubble-pile binary asteroid system (65803) Didymos |
|---|---|
| المؤلفون: | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal, Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Pajola, Maurizio, Tusberti, Filippo, Lucchetti, Alice, Barnouin, Olivier, Cambioni, Saverio, Ernst, Carolyn, Dotto, Elisabetta, Daly, R. Terik, Poggiali, Giovanni, Hirabayashi, Masatoshi, Nakano, Ryota, Mazzotta Epifani, Elena, Chabot, Nancy, Della Corte, Vincenzo, Rivkin, Andy, Agrusa, Harrison F., Zhang, Yun, Penasa, L., Ballouz, Ronald-Louis, Ivanovski, Stavro, Murdoch, Naomi, Rossi, Alessandro, Robin, Colas Q., Ieva, Simone, Vincent, Jean-Baptiste, Ferrari, Fabio, Raducan, Sabina D., Campo Bagatin, Adriano, Parro, Laura M., Benavídez, Paula Gabriela, Tancredi, Gonzalo, Karatekin, Ozgür, Trigo-Rodríguez, Josep M., Sunshine, Jessica M., Farnham, Tony, Asphaug, Erik, Deshapriya, J. D. Prasanna, Hasselmann, Pedro H., Beccarelli, Joel, Schwartz, Stephen R., Abell, Paul, Michel, Patrick, Cheng, Andy F., Brucato, John Robert, Zinzi, Angelo, Amoroso, Marilena, Pirrotta, Simone, Impresario, Gabriele, Bertini, Ivano, Capannolo, Andrea, Caporali, S., Ceresoli, M., Cremonese, Gabriele, Dall’Ora, Massimo, Gai, Igor, Gomez Casajus, L., Gramigna, E., Lasagni Manghi, R., Lavagna, Michèle, Lombardo, M., Modenini, Dario, Palumbo, Pasquale, Perna, Davide, Tortora, Paolo, Zannoni, Marco, Zanotti, Giovanni |
| بيانات النشر: | Springer Nature 2024-07-30 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | Asteroids smaller than 10 km are thought to be rubble piles formed from the reaccumulation of fragments produced in the catastrophic disruption of parent bodies. Ground-based observations reveal that some of these asteroids are today binary systems, in which a smaller secondary orbits a larger primary asteroid. However, how these asteroids became binary systems remains unclear. Here, we report the analysis of boulders on the surface of the stony asteroid (65803) Didymos and its moonlet, Dimorphos, from data collected by the NASA DART mission. The size-frequency distribution of boulders larger than 5 m on Dimorphos and larger than 22.8 m on Didymos confirms that both asteroids are piles of fragments produced in the catastrophic disruption of their progenitors. Dimorphos boulders smaller than 5 m have size best-fit by a Weibull distribution, which we attribute to a multi-phase fragmentation process either occurring during coalescence or during surface evolution. The density per km2 of Dimorphos boulders ≥1 m is 2.3x with respect to the one obtained for (101955) Bennu, while it is 3.0x with respect to (162173) Ryugu. Such values increase once Dimorphos boulders ≥5 m are compared with Bennu (3.5x), Ryugu (3.9x) and (25143) Itokawa (5.1x). This is of interest in the context of asteroid studies because it means that contrarily to the single bodies visited so far, binary systems might be affected by subsequential fragmentation processes that largely increase their block density per km2. Direct comparison between the surface distribution and shapes of the boulders on Didymos and Dimorphos suggest that the latter inherited its material from the former. This finding supports the hypothesis that some asteroid binary systems form through the spin up and mass shedding of a fraction of the primary asteroid. |
| مصطلحات الفهرس: | Asteroids, Didymos, Rubble-pile binary asteroid system, Multi-fragmentation, Mass shedding, Boulders, info:eu-repo/semantics/article |
| URL: | info:eu-repo/grantAgreement/EC/H2020/870377 |
| الاتاحة: | Open access content. Open access content info:eu-repo/semantics/openAccess © The Author(s) 2024. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
| Other Numbers: | ESALI oai:rua.ua.es:10045/145922 Nature Communications. 2024, 15:6205. https://doi.org/10.1038/s41467-024-50148-9 2041-1723 10.1038/s41467-024-50148-9 1452790778 |
| المصدر المساهم: | UNIV DE ALICANTE From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1452790778 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |