论文标题

WISE W1($3.4μ\ rm m $)和W2($4.6μ\ rm m $)乐队的Tully-Fisher关系的校准

Calibration of the Tully-Fisher relation in the WISE W1 ($3.4μ\rm m$) and W2 ($4.6μ\rm m$) Bands

论文作者

Bell, Rianna, Said, Khaled, Davis, Tamara, Jarrett, T. H.

论文摘要

在本文中,我们介绍了中型W1($3.4μ$ M)和W2($4.6μ$ M)频段的TF关系的校准,分别在W1和W2频段中分别使用大型样品848个星系和857个星系。在此校准中,我们对簇种群不完全偏置和形态类型校正进行了校正。使用新的,迭代的双变量拟合程序进行校准。对于这些校准,我们使用了总绝对幅度,HI线宽$ W_ {F50} $从HI全局配置文件衍​​生而来,作为旋转速度的度量。然后,我们使用(i)同一样品对同一样品进行了两个额外的校准,(i)(ii)沿星系空间旋转曲线的平坦截面测量的平均旋转速度,这些速度是从旋转速度定义之间的经验转换中获得的。我们比较了这三个校准,以确定同位幅度的使用或空间分辨的旋转速度是否对W1和W2频段中TF关系周围的散射产生了重大影响。我们发现,使用总幅度和\ hi线宽的原始校准的总散射最小。这些校准由$ m _ {\ rm tot,w1} =(2.02 \ pm 0.44) - (10.08 \ pm 0.17)\ log_ {10}(w_ {f50})$和$ m _ {\ rm tok tos 0.17)\ log_ {10}(w_ {f50})$,相关的总散布为$σ_{w1} = 0.68 $和$σ_{w2} = 0.69 $。最后,我们比较了中红外带中的校准与近红外J,H和K频段中的先前校准以及使用相同两个校正的长波长I频段。这些关系之间的差异可以通过考虑由不同波长追溯的螺旋星系的不同区域和组成部分来解释。

In this paper, we present our calibrations of the TF relation in the mid-infrared W1 ($3.4μ$m) and W2 ($4.6μ$m) bands, using large samples 848 galaxies and 857 galaxies in the W1 and W2 bands respectively. In this calibration we performed a correction for the cluster population incompleteness bias, and a morphological type correction. The calibration was performed using a new, iterative bivariate fitting procedure. For these calibrations we used the total absolute magnitudes, and HI linewidths $W_{F50}$ derived from the HI global profiles as a measure of the rotational velocities. We then performed two additional calibrations on the same sample using (i) the isophotal magnitudes and (ii) the average rotational velocities measured along the flat sections of the spatially resolved rotation curves of the galaxies, which were obtained from the empirical conversion between rotational velocity definitions. We compared these three calibrations to determine whether the use of isophotal magnitudes, or spatially resolved rotational velocities have a significant impact on the scatter around the TF relations in the W1 and W2 bands. We found that the original calibrations using total magnitudes and \hi linewidths had the smallest total scatters. These calibrations are given by $M_{\rm Tot, W1} = (2.02 \pm 0.44) - (10.08 \pm 0.17)\log_{10}(W_{F50})$ and $M_{\rm Tot, W2} = (2.00 \pm 0.44) - (10.11 \pm 0.17)\log_{10}(W_{F50})$, with associated total scatters of $σ_{W1} = 0.68$ and $σ_{W2} = 0.69$. Finally, we compared our calibrations in the mid-infrared bands with previous calibrations in the near-infrared J, H and K bands and the long-wavelength optical I band, which used the same two corrections. The differences between these relations can be explained by considering the different regions and components of spiral galaxies that are traced by the different wavelengths.

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