论文标题
138175（2000 EE104）和星际场上增强的来源
138175 (2000 EE104) and the Source of Interplanetary Field Enhancements
论文作者
论文摘要
我们提出了对近地对象138175（2000 EE104）进行表征的第一个光学观察结果。该机构与星际场地的增强（IFES）有关，这是由太阳能磁场和固体物质之间的相互作用引起的，该磁场和固体物质尾随的轨道轨道轨道的轨道。基于光学光度，发现相等区域球的半径（以米为单位）和质量（以千克为单位）为R_n = 250（0.1/p_r）** 0.5和M_N = 1E11（0.1/p_r）** 1.5，其中P_R是红色的微粒Aldotric Aldotric Aldotric Abledric 1500 kg/m3 is p_r。测得的颜色介于C型（原始）和S型（变形）小行星之间的颜色中间，但与S-type相比，与C型分类相比，与C型分类更一致，但具有校正性。没有找到大于大约40米（0.1/p_r）米的共同移动同伴的证据，也没有检测到灰尘粒子步道，从而限制了小径光学深度2E-9。对冲击粉碎产生的尺寸分布的考虑使得很难产生需要考虑IFE所需的纳米构质量（最低1e5 kg至1e6 kg），除非尺寸分布异常陡峭。此外，所需尺寸的源对象的冲击粉碎时间尺度比动态时间尺度更长。尽管新的光学数据并未明确反驳巨石粉碎是IFES的来源的假设，但它们也不提供任何支持。
We present the first optical observations taken to characterize the near-Earth object 138175 (2000 EE104). This body is associated with Interplanetary Field Enhancements (IFEs), thought to be caused by interactions between the solar wind magnetic field and solid material trailing in the orbit of the parent body. Based on optical photometry, the radius (in meters) and mass (in kilograms) of an equal-area sphere are found to be r_n = 250(0.1/p_R)**0.5 and M_n = 1e11(0.1/p_R)**1.5, respectively, where p_R is the red geometric albedo and density 1500 kg/m3 is assumed. The measured colors are intermediate between those of C-type (primitive) and S-type (metamorphosed) asteroids but, with correction for the likely effects of phase-reddening, are more consistent with a C-type classification than with S-type. No evidence for co-moving companions larger than about 40(0.1/p_R) meter in radius is found, and no dust particle trail is detected, setting a limit to the trail optical depth 2e-9. Consideration of the size distribution produced by impact pulverization makes it difficult to generate the mass of nanodust (minimum 1e5 kg to 1e6 kg) required to account for IFEs, unless the size distribution is unusually steep. Furthermore, impact pulverization timescales for source objects of the required size are much longer than the dynamical timescale. While the new optical data do not definitively refute the hypothesis that boulder pulverization is the source of IFEs, neither do they provide any support for it.
