Interstellar polarization at high galactic latitudes from distant stars - V. First results for the South Galactic Pole

被引:0
作者
Berdyugin, A [1 ]
Teerikorpi, P [1 ]
机构
[1] Tuorla Observ, Piikkio 21500, Finland
关键词
polarization; dust; extinction; solar neighbourhood;
D O I
10.1051/0004-6361:20010202-1
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present the first results of our interstellar polarization programme for the South Galactic Pole (b < -70 degrees). The new observations (43 stars) combined with previously published data show that there is a substantial interstellar polarization in this area of the sky. Starting at a distance of 300 pc. we have found stars with P > 0.3% including one for which P approximate to 0.6%. These measurements lead to the conclusion that there is a significant amount of interstellar dust at high south galactic latitudes. Futhermore, there is a remarkable alignment seen over the South Polar Clap: for most stars the directions of polarization vectors are aligned with the longitude l approximate to 80 degrees, close to the expected direction of the global magnetic field. in this respect the SGP seems to differ strongly from its northern counterpart.
引用
收藏
页码:635 / 638
页数:4
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