Angular spectra of polarized Galactic foregrounds

被引：7

作者：

Cho, JY ^{[1
]}

Lazarian, A ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA

来源：

NEW ASTRONOMY REVIEWS | 2003年 / 47卷 / 11-12期

关键词：

D O I：

10.1016/j.newar.2003.09.015

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It is believed that magnetic field lines are twisted and bend by turbulent motions in the Galaxy. Therefore, both Galactic synchrotron emission and thermal emission from dust reflects statistics of Galactic turbulence. Our simple model of Galactic turbulence, motivated by results of our simulations, predicts that Galactic disk and halo exhibit different angular power spectra. We show that observed angular spectra of synchrotron emission are compatible with our model. We also show that our model is compatible with the angular spectra of star-light polarization for the Galactic disk. Finally, we discuss how one can estimate polarized microwave emission from dust in the Galactic halo using star-light polarimetry. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：1143 / 1149

页数：7

共 45 条

[41] Velocity and density spectra of the Small Magellanic Cloud [J].