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EMPIRICAL BOUNDS FOR THE IONIZING FLUXES OF WOLF-RAYET STARS

机译:人造卫星电离通量的经验界

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Ha photometry and spectroscopic data have been obtained for 10 Wolf-Rayet nebulae, representing a wide variety of WN spectral types. We use these data to constrain the ionizing flux of the exciting Wolf-Rayet star, calculating lower bounds for the Lyman continuum flux (Q_0) and for the He~0- and He~+-ionizing fluxes (Q_1 and Q_2). We find that Q_0 appears independent of WN spectral type, and lower bound estimates tend to cluster around 48 dex. Finally, we discuss the effects of potential shock excitation and density bounding on these nebulae and compare our results to recent models. Our results are consistent with the predictions of line-blanketed ISA-wind models and nonblanketed CMFGEN models but are consistent with only some of the line-blanketed CMFGEN models.
机译:已经获得了10个Wolf-Rayet星云的Ha光度学和光谱数据,代表了各种各样的WN光谱类型。我们用这些数据来约束激发沃尔夫-雷耶特星的电离通量,计算莱曼连续通量(Q_0)以及He〜0和He〜+电离通量(Q_1和Q_2)的下界。我们发现,Q_0的出现与WN光谱类型无关,并且下限估计值倾向于在48 dex附近聚集。最后,我们讨论了潜在的激振和密度边界对这些星云的影响,并将我们的结果与最新模型进行了比较。我们的结果与折线ISA风模型和非折线CMFGEN模型的预测一致,但仅与某些折线CMFGEN模型一致。

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