Menzel 3: a Multipolar Nebula in the Making
Menzel 3: a Multipolar Nebula in the Making
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Menzel 3：正在形成的多极星云
DOI：
10.1086/423909
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
L. F. Miranda
中科院分区：
文献类型：
--
作者：
M. Guerrero;Y. Chu;L. F. Miranda
星云门泽尔3 （mz3）可以说是最复杂的双极形态，由三对嵌套的双极叶和一个赤道椭圆组成。它的三对双极性裂片具有相同的对称轴，但具有非常不同的开口角度和形态：最里面的一对双极性裂片为闭瓣形态，而另外两个双极性裂片分别为圆柱形和圆锥形。我们对mz3进行了高色散光谱观察，发现了不同形态组分之间不同的运动特性。外两对叶瓣的膨胀特征表明它们起源于爆炸事件，而最内层的叶瓣是由快速风与周围物质的相互作用造成的。赤道椭圆与快速赤道流出有关，这在双极星云中是独一无二的。mz3不同构造的动力学年龄暗示了偶发性双极抛射，这些不同构造之间不同的形态和运动学揭示了这些偶发性抛射之间系统的根本变化。
The nebula Menzel 3 (Mz 3) has arguably the most complex bipolar morphology, consisting of three nested pairs of bipolar lobes and an equatorial ellipse. Its three pairs of bipolar lobes share the same axis of symmetry but have very different opening angles and morphologies: the innermost pair of bipolar lobes shows closed-lobe morphology, whereas the other two have open lobes with cylindrical and conical shapes, respectively. We have carried out high-dispersion spectroscopic observations of Mz 3 and detected distinct kinematic properties among the different morphological components. The expansion characteristics of the two outer pairs of lobes suggest that they originated in an explosive event, whereas the innermost pair of lobes resulted from the interaction of a fast wind with the surrounding material. The equatorial ellipse is associated with a fast equatorial outflow, which is unique among bipolar nebulae. The dynamical ages of the different structures in Mz 3 suggest episodic bipolar ejections, and the distinct morphologies and kinematics among these different structures reveal fundamental changes in the system between these episodic ejections.