论文标题
天生行星星云A30的J4赤道结的丰度分析
Abundance Analysis of the J4 Equatorial Knot of the Born-again Planetary Nebula A30
论文作者
论文摘要
A30属于一类被识别为“出生的星云”，其中包含具有极高丰度差异因子（ADF）的密集，贫穷的弹出物，可能与中央二进制系统有关。我们提出了一个这样的特征 - J4赤道结的中间分散光谱。我们证实了在以前的研究中观察到的极性和赤道结的明显物理和化学分离，并将O $^{2+} $的ADF上限为35，其上限为35，显着低于极性结的ADF。这些发现进一步加强了赤道和极性结源于不同事件的理论。
A30 belongs to a class of planetary nebulae identified as "born-again", containing dense, hydrogen-poor ejecta with extreme abundance discrepancy factors (ADFs), likely associated with a central binary system. We present intermediate-dispersion spectroscopy of one such feature-the J4 equatorial knot. We confirm the apparent physical and chemical segregation of the polar and equatorial knots observed in previous studies, and place an upper limit on the ADF for O$^{2+}$ of 35, significantly lower than that of the polar knots. These findings further reinforce the theory that the equatorial and polar knots originate from different events.
