LISA Pathfinder 中的微流星体事件
地球与行星天体物理
2019-10-03 v2
摘要
黄道尘埃复合体是弥漫于太阳系中的尘埃与小颗粒群体，为行星、彗星、小行星及其他天体的形成与动力学提供了重要见解。在此我们呈现一组使用新技术获得的新数据：直接测量单个颗粒撞击对航天器的动量传递。该技术得益于 LISA Pathfinder 航天器上所搭载仪器的极高精度，该航天器是未来天基引力波观测台的技术验证器，于 2016 年初至 2017 年夏季期间在第一日地拉格朗日点附近运行。利用简单的撞击模型与控制系统的知识，我们表明可以探测撞击并测量诸如传递动量（与颗粒质量和速度相关）、运动方向以及航天器上撞击位置等性质。本文中，我们呈现了对 4348 小时 Pathfinder 数据中进行撞击系统搜索的结果。我们共报告 54 个候选事件，其动量范围从 0.2 到 230。我们进一步将这些候选者与内太阳系微流星体群体的模型进行比较，包括源自木星族彗星、奥尔特云彗星、哈雷型彗星与小行星的模型。我们发现所测群体与以木星族彗星为主导、并有一定哈雷型彗星较小贡献的群体一致。这与在 LISA Pathfinder 所采样动量范围内黄道尘埃复合体的共识模型相符。
引用
@article{arxiv.1905.02765,
title = {Micrometeoroid Events in LISA Pathfinder},
author = {James Ira Thorpe and Jacob Slutsky and John Baker and Tyson Littenberg and Sophie Hourihane and Nicole Pagane and Petr Pokorny and Diego Janches and Michele Armano and Heather Audley and G. Auger and Jonathan Baird and Massimo Bassan and Pierre Binetruy and Michael Born and D. Bortoluzzi and N. Brandt and M. Caleno and A Cavalleri and A Cesarini and A. M. Cruise and K. Danzmann and M. de Deus Silva and R. De Rosa and L. Di Fiore and I. Diepholz and G. Dixon and R. Dolesi and N. Dunbar and L. Ferraioli and V. Ferroni and E. Fitzsimons and R. Flatscher and M. Freschi and C. Garcia Marirrodriga and R. Gerndt and L. Gesa and F. Gibert and D. Giardini and R. Giusteri and A. Grado and C. Grimani and J. Gryzmisch and I. Harrison and G. Heinzel and M. Hewitson and D. Hollington and D. Hoyland and M. Hueller and H. Inchauspe and O. Jennrich and P. Jetzer and B. Johlander and N. Karnesis and B. Kaune and N. Korsakova and C. Killow and J. A. Lobo and I. Lloro and L. Liu and J. P. Lopez-Zaragoza and R. Maarschalkerweerd and D. Mance and V. Martin and L. Martin-Polo and J. Martino and F. Martin-Porqueras and S. Madden and I. Mateos and P. W. McNamara and J. Mendes and L. Mendes and M. Nofarias and S. Paczkowski and M. Perreur-Lloyd and A. Petiteau and P. Pivato and E. Plagnol and P. Prat and U. Ragnit and J. Ramos-Castro and J. Reiche and D. Robertson and H. Rozemeijer and F. Rivas and G. Russano and P. Sarra and A. Schleicher and D. Shaul and C. Soperta and R. Stanga and T. Sumner and D. Texier and M. Trobs and D. Vetrungno and S. Vitale and G. Wanner and H. Ward and P. Wass and D. Wealthy and W. J. Weber and L. Wissel and A. Wittchen and A. Zambotti and C. Zanoni and T. Ziegler and P. Zweifel},
journal= {arXiv preprint arXiv:1905.02765},
year = {2019}
}
备注
22 pages, 14 figures, accepted in ApJ