NIR塔利-费舍尔在回避区。- II。南ZOA星系的21 cm HI谱
NIR Tully-Fisher in the Zone of Avoidance. - II. 21 cm HI-line spectra of southern ZOA galaxies
摘要：
本文给出了南避带（ZOA）倾斜（$(b/a)^o < 0.5$）旋涡星系的高精度HI轮廓和谱线宽度。这些星系定义了一个样本，用于使用近红外塔利-费舍尔（TF）关系测定奇特的速度。该样本基于帕克斯HI回避区巡天（HIZOA）中的394个HI选择星系。在2010年和2015年获得了290个星系的后续窄带Parkes HI观测结果，而对于另外104个星系，原始HIZOA数据可以获得足够高的信噪比光谱。所有394个光谱都以相同的系统方式进行了简化和参数化。五种不同类型的线宽测量，推导出贝叶斯混合模型来推导这五个宽度之间的转换方程。在选定和测量的星系中，342个具有足够的信噪比（S/N $\geq$ 5），可用于TF距离估计。样品的信噪比的平均值为14.7。我们提出了这些星系的HI参数。该样本将允许更准确地确定南部ZOA的流场，该流场将动力学上重要的大尺度结构（如船尾座、大吸引力和局部虚空）一分为二。
英文摘要：
High-accuracy HI profiles and linewidths are presented for inclined ($(b/a)^o < 0.5$) spiral galaxies in the southern Zone of Avoidance (ZOA). These galaxies define a sample for use in the determinations of peculiar velocities using the near-infrared Tully-Fisher (TF) relation. The sample is based on the 394 HI-selected galaxies from the Parkes HI Zone of Avoidance survey (HIZOA). Follow-up narrow-band Parkes HI observations were obtained in 2010 and 2015 for 290 galaxies, while for the further 104 galaxies, sufficiently high signal-to-noise spectra were available from the original HIZOA data. All 394 spectra are reduced and parameterized in the same systematic way. Five different types of linewidth measurements were derived, and a Bayesian mixture model was used to derive conversion equations between these five widths. Of the selected and measure galaxies, 342 have adequate signal-to-noise (S/N $\geq$ 5) for use in TF distance estimation. The average value of the signal-to-noise ratio of the sample is 14.7. We present the HI parameters for these galaxies. The sample will allow a more accurate determination of the flow field in the southern ZOA which bisects dynamically important large-scale structures such as Puppis, the Great Attractor, and the Local Void.
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