Strongly beamed, polarized radio emission from CU virginis

被引：3

作者：

Koupriyanova E.H. ^{[1
]}

Stepanov A.V. ^{[1
]}

机构：

[1] Main Astrophysical Observatory, Russian Academy of Sciences, St.Petersburg

来源：

Radiophysics and Quantum Electronics | 2001年 / 44卷 / 09期

基金：

俄罗斯基础研究基金会;

关键词：

This work was supported by the Russian Foundation for Basic Research (project Nos. 00{02{16356 and 00{02{16184) and the State Scienti c and Technical Program Astronomy (1.4.3.4). The authors are grateful to Yu. N. Gnedin and N. A. Sokolov who drew our attention to the problem of activity of CU Vir;

D O I：

10.1023/A:1013015227126

中图分类号：

学科分类号：

摘要：

We propose the plasma mechanism of generation of the strongly beamed, fully polarized radio emission from a chemically peculiar star CU Vir observed with VLA at 1:4 GHz in June 2, 6, and 9, 1998. The radio emission arises from the Rayleigh scattering of longitudinal waves excited near the upper-hybrid resonance due to the loss-cone instability on suprathermal electrons in the magnetosphere of CU Vir. It is shown that the nonlinear stimulated scattering of upper-hybrid waves and the regular refraction of radiowaves in the stellar corona are the main factors forming the angular pattern of the radio emission. As the result, the angular pattern of the radiation of CU Vir narrows to 3°-10°. © 2001 Plenum Publishing Corporation.

引用

页码：726 / 732

页数：6

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