考虑到热结构、电离结构和O进入尘埃颗粒的损耗对HII区的Pagel方法的重新校准
Recalibration of Pagel's method for HII regions considering the thermal structure, the ionization structure, and the depletion of O into dust grains
摘要：
利用文献中的28个HII区的样本和测量的温度不均匀性参数t^2，我们对Te（4363/5007）方法确定的化学丰度进行了统计校正。我们使用t^2值来校正氧气的气体丰度，并考虑到氧气消耗到尘埃中，以计算这些物体的总丰度。这种校正是用来获得一个新的校准Pagel的强线方法，R_{23}，以确定在HII地区的氧丰度。我们的新校准同时考虑了温度结构，电离结构，和氧耗尽成尘埃颗粒的分数。文献中以前的校准包括这些因素中的一个或两个;这是第一次将所有三个因素都考虑在内。这种重新校准调和了不同方法测得的温度之间的系统差异。我们发现，由于热不均匀性和灰尘耗尽的总校正量增加的HII地区的O/H比的因素为1.7至2.2（或0.22至0.35德克斯）。这一结果在天体物理学的各个领域都有重要的意义，例如研究初始质量函数的高端，恒星形成率和星系的质量-金属丰度关系等。
英文摘要：
Using a sample of 28 HII regions from the literature with measured temperature inhomogeneity parameter, t^2, we present a statistical correction to the chemical abundances determined with the Te(4363/5007) method. We used the t^2 values to correct the oxygen gaseous abundances and consider the oxygen depletion into dust to calculate the total abundances for these objects. This correction is used to obtain a new calibration of Pagel's strong-line method, R_{23}, to determine oxygen abundances in HII regions. Our new calibration simultaneously considers the temperature structure, the ionization structure, and the fraction of oxygen depleted into dust grains. Previous calibrations in the literature have included one or two of these factors; this is the first time all three are taken into account. This recalibration conciliates the systematic differences among the temperatures found from different methods. We find that the total correction due to thermal inhomogeneities and dust depletion amounts to an increase in the O/H ratio of HII regions by factors of 1.7 to 2.2 (or 0.22 to 0.35 dex). This result has important implications in various areas of astrophysics such as the study of the higher end of the initial mass function, the star formation rate, and the mass-metallicity relation of galaxies, among others.
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