Photoemission on the surface of Mercury and related electrical phenomena

被引：23

作者：

Grard, R

机构：

[1] Space Sci. Department of ESA/ESTEC, 2200 AG Noordwijk

来源：

PLANETARY AND SPACE SCIENCE | 1997年 / 45卷 / 01期

关键词：

D O I：

10.1016/S0032-0633(96)00096-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Solar photons interact with the surface of Mercury due to the absence of an atmosphere. Photoelectrons are emitted from the sunlit hemisphere with a mean kinetic energy of about 1.6eV. The current density lies in the range 0.1-0.2 mA m(-2) at the subsolar point and is maximum at perihelion. Photoemission provides the means of a direct electrical coupling between the planet and its magnetospheric environment and sets a lower limit of the order of 10(-5) S to the conductance of the surface of a perfectly insulating regolith. (C) 1997 Published by Elsevier Science Ltd.

引用

页码：67 / 72

页数：6

共 18 条

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