小行星 2023 CX1 的灾难性解体及其对行星防御的启示
地球与行星天体物理
2025-09-17 v1 天体物理仪器与方法
摘要
减轻空爆小行星的威胁需要了解它们对地面造成的潜在风险。由于显著撞击事件极为罕见，人们对小行星如何在大气中释放动能尚不充分了解。普通球粒陨石，特别是 L 型球粒陨石，代表了撞击地球小行星的常见类型。在此，我们首次对 L 型球粒陨石撞击进行了从空间到实验室的全面表征。小行星 2023 CX1 在太空中被探测到，并预测将于 2023 年 2 月 13 日坠落于法国诺曼底上空。来自多个独立传感器和归算技术的观测揭示了一种不寻常但具有潜在高风险的碎裂行为。这颗近球形的、质量为 650 160 kg（直径 72 6 cm）的小行星在海拔约 28 km 处发生灾难性解体，将其 98% 的总能量释放到大气的集中区域。由此产生的激波是球形的而非圆柱形的，并在靠近地面处释放了更多能量。这种类型的碎裂增加了地面遭受严重破坏的风险。这些结果表明，在预期动态压力 >3-4 MPa 的情况下，行星防御策略需要考虑此类情况，包括规划对预期解体位置下方区域的疏散。
引用
@article{arxiv.2509.12362,
title = {Catastrophic disruption of asteroid 2023 CX1 and implications for planetary defense},
author = {Auriane Egal and Denis Vida and François Colas and Brigitte Zanda and Sylvain Bouley and Asma Steinhausser and Pierre Vernazza and Ludovic Ferrière and Jérôme Gattacceca and Mirel Birlan and Jérémie Vaubaillon and Karl Antier and Simon Anghel and Josselin Desmars and Kévin Baillié and Lucie Maquet and Sébastien Bouquillon and Adrien Malgoyre and Simon Jeanne and Jiři Borovička and Pavel Spurný and Hadrien A. R. Devillepoix and Marco Micheli and Davide Farnocchia and Shantanu Naidu and Peter Brown and Paul Wiegert and Krisztián Sárneczky and András Pál and Nick Moskovitz and Theodore Kareta and Toni Santana-Ros and Alexis Le Pichon and Gilles Mazet-Roux and Julien Vergoz and Luke McFadden and Jelle Assink and Läslo Evers and Daniela Krietsch and Henner Busemann and Colin Maden and Lisa Maria Eckart and Jean-Alix Barrat and Pavel Povinec and Ivan Sykora and Ivan Kontul' and Oscar Marchhart and Martin Martschini and Silke Merchel and Alexander Wieser and Matthieu Gounelle and Sylvain Pont and Pierre Sans-Jofre and Sebastiaan de Vet and Ioannis Baziotis and Miroslav Brož and Michaël Marsset and Jérôme Vergne and Josef Hanuš and Maxime Devogèle and Luca Conversi and Francisco Ocaña and Luca Buzzi and Dan Alin Nedelcu and Adrian Sonka and Florent Losse and Philippe Dupouy and Korado Korlević and Dieter Husar and Jost Jahn and Damir Šegon and Mark McIntyre and Ralf Neubert and Pierre Beck and Patrick Shober and Anthony Lagain and Josep Maria Trigo-Rodriguez and Enrique Herrero and Jim Rowe and Andrew R. D. Smedley and Ashley King and Salma Sylla and Daniele Gardiol and Dario Barghini and Hervé Lamy and Emmanuel Jehin and Detlef Koschny and Bjorn Poppe and Andrés Jordán and Rene A. Mendez and Katherine Vieira and Hebe Cremades and Hasnaa Chennaoui Aoudjehane and Zouhair Benkhaldoun and Olivier Hernandez and Darrel Robertson and Peter Jenniskens},
journal= {arXiv preprint arXiv:2509.12362},
year = {2025}
}
备注
This preprint has not undergone peer review (when applicable) or any post-submission improvements or corrections. The Version of Record of this article is published in \textit{Nature Astronomy}, and is available online at https://doi.org/10.1038/s41550-025-02659-8