The ATLAS3D project - V. The CO Tully-Fisher relation of early-type galaxies The CO-TFR of early-type galaxies
The ATLAS3D project - V. The CO Tully-Fisher relation of early-type galaxies The CO-TFR of early-type galaxies
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ATLAS3D 项目 - 五、早型星系的 CO Tully-Fisher 关系 早型星系的 CO-TFR
DOI：
10.1111/j.1365-2966.2011.18284.x
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发表时间：
2011
影响因子：
4.8
通讯作者：
Davis T
中科院分区：
文献类型：
--
作者：
Davis T
我们证明在这里使用单盘和干涉观测CO分子是一个很好的运动示踪剂，即使在高质量的星系，使我们能够调查的第一次CO塔利-费舍尔关系（CO-TFR）的早期类型的星系。我们比较了使用单碟和干涉数据和各种倾斜估计方法产生的TFRs，并评估使用的速度剖面形状作为选择星系的标准，其中分子气体延伸超过旋转曲线的峰值。我们表明，最佳拟合关系的梯度和零点是强大的，独立的速度测量和倾斜使用，并同意与使用恒星运动学导出的关系。我们还发现，在Ks波段，早型CO-TFR与螺旋型CO-TFR相差0.98 ± 0.22mag，这与其它结果一致。内禀散射的关系被发现是10.4等，类似的螺旋星系人口中发现的水平。下一代的大型毫米波望远镜和阿塔卡玛大型毫米波/亚毫米波阵列等设施应该允许这种技术在更高的红移系统中使用，提供一种简单的新工具来追踪宇宙时间内最大质量星系的质光比演化。
We demonstrate here using both single-dish and interferometric observations that CO molecules are an excellent kinematic tracer, even in high-mass galaxies, allowing us to investigate for the first time the CO Tully–Fisher relation (CO-TFR) of early-type galaxies. We compare the TFRs produced using both single-dish and interferometric data and various inclination estimation methods, and evaluate the use of the velocity profile shape as a criterion for selecting galaxies in which the molecular gas extends beyond the peak of the rotation curve. We show that the gradient and zero-point of the best-fitting relations are robust, independent of the velocity measure and inclination used, and agree with those of relations derived using stellar kinematics. We also show that the early-type CO-TFR is offset from the CO-TFR of spirals by 0.98 ± 0.22 mag atKsband, in line with other results. The intrinsic scatter of the relation is found to be ≈0.4 mag, similar to the level found in the spiral galaxy population. Next-generation facilities such as the Large Millimeter Telescope and the Atacama Large Millimeter/Sub-millimeter Array should allow this technique to be used in higher redshift systems, providing a simple new tool to trace the mass-to-light ratio evolution of the most massive galaxies over cosmic time.