从恒星掩星观测看Chariklo环的结构
地球与行星天体物理
2017-09-20 v2
摘要
在2013年6月3日观测到的一次恒星掩星过程中，在半人马天体(10199) Chariklo周围发现了两条狭窄而密集的环（称为C1R和C2R）。在此发现之后，我们计划观测Chariklo系统的多次掩星，以更好地表征环和主天体的物理性质。本文使用了2014年至2016年间观测到的12次成功的Chariklo掩星。它们提供了环的轮廓（物理宽度、不透明度、边缘结构）以及对半径和极点位置的约束。我们的新观测目前与Braga-Ribas等人推导出的环半径±3.3 km的形式不确定度范围内的圆形环解和极点位置一致。六个分辨出的C1R轮廓显示出从约5 km到7.5 km的显著宽度变化。较暗的C2R环的宽度约束较少，可能在0.1 km到1 km之间变化。C1R的内边缘和外边缘与无限尖锐的边界一致，环与空空间之间过渡区的典型上限为1 km。目前尚无对C2R边缘尖锐度的约束。对于在环平面内计数、距离达12,000 km的狭窄（物理宽度<4 km）环的等效宽度，推导出了约20 m的1上限。
引用
@article{arxiv.1706.00207,
title = {The structure of Chariklo's rings from stellar occultations},
author = {D. Bérard and B. Sicardy and J. I. B. Camargo and J. Desmars and F. Braga-Ribas and J. L. Ortiz and R. Duffard and N. Morales and E. Meza and R. Leiva and G. Benedetti-Rossi and R. Vieira-Martins and A. R. Gomes-Júnior and M. Assafin and F. Colas and J. L. Dauvergne and P. Kervella and J. Lecacheux and L. Maquet and F. Vachier and S. Renner and B. Monard and A. A. Sickafoose and H. Breytenbach and A. Genade and W. Beisker and K. L. Bath and H. J. Bode and M. Backes and V. D. Ivanov and E. Jehin and M. Gillon and J. Manfroid and J. Pollock and G. Tancredi and S. Roland and R. Salvo and L. Vanzi and D. Herald and D. Gault and S. Kerr and H. Pavlov and K. M. Hill and J. Bradshaw and M. A. Barry and A. Cool and B. Lade and A. Cole and J. Broughton and J. Newman and R. Horvart and D. Maybour and D. Giles and L. Davis and R. A. Paton and B. Loader and A. Pennell and P. D. Jaquiery and S. Brillant and F. Selman and C. Dumas and C. Herrera and G. Carraro and L. Monaco and A. Maury and A. Peyrot and J. P. Teng-Chuen-Yu and A. Richichi and P. Irawati and C. De Witt and P. Schoenau and R. Prager and C. Colazo and R. Melia and J. Spagnotto and A. Blain and S. Alonso and A Román and P. Santos-Sanz and J. L. Rizos and J. L. Maestre and D. Dunham},
journal= {arXiv preprint arXiv:1706.00207},
year = {2017}
}