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arXiv 1806.09013astro-ph.GA
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CALIFA星系的运动学标度关系:哈勃序列中星系的动力学质量代理

Kinematic scaling relations of CALIFA galaxies: A dynamical mass proxy for galaxies across the Hubble sequence

E. Aquino-Ortíz, O. Valenzuela, S. F. Sánchez, H. Hernández-Toledo, V. Ávila-Reese, G. van de Ven, A. Rodríguez-Puebla, L. Zhu, B. Mancillas, M. Cano-Díaz, R. García-Benito

摘要:

我们使用从Calar Alto Legacy Integral Field Area Survey(CALIFA)第三次数据发布中公开获得的667个空间分辨星系的电离气体和恒星运动学,目的是研究运动学标度关系,如使用旋转速度的Tully $\&$ Fisher(TF)关系,$V_{rot}$,使用速度色散的Faber $\&$ Jackson(FJ)关系,$σ$,以及通过定义为具有恒定$K$的$S_{K}^2 = KV_{rot}^2 + σ^2$的$S_{K}$参数的$V_{rot}$和$σ$的组合。晚型和早型星系再现了TF和FJ关系。一些早型星系也遵循TF关系,一些晚型星系也遵循FJ关系,但都具有较大的散射。相反,当我们使用$S_{K}$参数时,所有的星系,无论其形态类型如何,都处于相同的标度关系,显示出与恒星总质量$M_\star$的紧密相关性。事实上,我们发现,在这个关系的散射小于或等于TF和FJ关系。我们探讨了$K=0.5$参数的不同值,除了零点的小变化之外,在我们的最终结果中没有显著差异(斜率和分散度)。我们校准的运动学$S_{K}^2$动力学质量代理,以使其符合复杂的出版动力学模型内$0.15\ dex$。结果表明,$S_{K}$代用品能够再现星系内部区域的动力学质量与恒星质量之间的关系。我们的结果可能是有用的,以产生快速估计的中心动力学质量的星系和研究相关性在大型星系调查。

英文摘要:

We used ionized gas and stellar kinematics for 667 spatially resolved galaxies publicly available from the Calar Alto Legacy Integral Field Area survey (CALIFA) 3rd Data Release with the aim of studying kinematic scaling relations as the Tully $\&$ Fisher (TF) relation using rotation velocity, $V_{rot}$, the Faber $\&$ Jackson (FJ) relation using velocity dispersion, $σ$, and also a combination of $V_{rot}$ and $σ$ through the $S_{K}$ parameter defined as $S_{K}^2 = KV_{rot}^2 + σ^2$ with constant $K$. Late-type and early-type galaxies reproduce the TF and FJ relations. Some early-type galaxies also follow the TF relation and some late-type galaxies the FJ relation, but always with larger scatter. On the contrary, when we use the $S_{K}$ parameter, all galaxies, regardless of the morphological type, lie on the same scaling relation, showing a tight correlation with the total stellar mass, $M_\star$. Indeed, we find that the scatter in this relation is smaller or equal to that of the TF and FJ relations. We explore different values of the $K$ parameter without significant differences (slope and scatter) in our final results with respect the case $K=0.5$ besides than a small change in the zero point. We calibrate the kinematic $S_{K}^2$ dynamical mass proxy in order to make it consistent with sophisticated published dynamical models within $0.15\ dex$. We show that the $S_{K}$ proxy is able to reproduce the relation between the dynamical mass and the stellar mass in the inner regions of galaxies. Our result may be useful in order to produce fast estimations of the central dynamical mass in galaxies and to study correlations in large galaxy surveys.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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