The scattered Hα emission-line filaments in M82
The scattered Hα emission-line filaments in M82
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M82 中的散射 Hα 发射线细丝
DOI：
10.1093/mnras/252.1.12p
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发表时间：
1991
影响因子：
4.8
通讯作者：
D. Axon
中科院分区：
文献类型：
--
作者：
S. M. Scarrott;N. Eaton;D. Axon
呈现了一幅在单色Hα光下获得的星暴星系M82的线偏振图。在整个丝状系统中观测到约10% - 30%的偏振水平，偏振矢量形成的中心对称图案表明发射线丝是一个巨大的双极反射星云的一部分。偏振图案的圆形对称性需要一个中心照明源，由于光行时的原因，该源必须在至少5000年的时间里主导了星系的Hα发射。
A linear polarization map of the starburst galaxy M82, obtained in the light of monochromatic Hα, is presented. Polarization levels, ∼10-30 per cent, are observed throughout the filamentary system and the centro-symmetric pattern formed by the polarization vectors demonstrates that the emission-line filaments are part of a huge bipolar reflection nebula. The circular symmetry of the polarization pattern requires a central illuminating source which, due to light travel time arguments, must have dominated the Hα emission of the galaxy for at least 5000 yr