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arXiv 2302.05029astro-ph.GA
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MaNGA和IllustrisTNG中重子Tully-Fisher关系的比较

A Comparison of the Baryonic Tully-Fisher Relation in MaNGA and IllustrisTNG

Julian S. Goddy, David V. Stark, Karen L. Masters, Kevin Bundy, Niv Drory, David R. Law

摘要:

我们比较观察到的重子Tully-Fisher关系(BTFR)从映射附近Galerkin在阿帕奇点天文台(MANGA)和HI-MANGA调查模拟BTFR从宇宙学磁流体动力学模拟IllustrisTNG。要做到这一点,我们校准BTFR的本地宇宙使用377星系的MANGA和HI-MANGA调查,并进行模拟21厘米的观测匹配的星系从IllustrisTNG。模拟观测用于确保与观测星系的比较是公平的,因为它具有相同的测量算法,观测限制,偏差和不确定性。为了比较,我们还计算了模拟没有模拟观测的BTFR,并证明了如何模拟观测是必要的,以公平和一致地比较观测和理论数据。我们报告log $_{10} (M_{ \rm Bary}/M_\odot)= (2.97 \pm 0.18)$ log $_{10} V_{ \rm Rot} + (4.04 \pm 0.41)\,\log_{10}{M_{\odot}}$的MaNGA BTFR和log $_{10} (M_{ \rm Bary}/M_\odot) = (2.94 \pm 0.23$ log $_{10} V_{ \rm Rot} + (4.15 \pm 0.44)\,\log_{10}{M_{\odot}}$的IllustrisTNG BTFR。因此,MaNGA和IllustrisTNG产生的BTFR在不确定性范围内一致,表明IllustrisTNG已经创造了一个星系群,该星系群遵守观测到的宇宙中质量和旋转速度之间的关系。

英文摘要:

We compare an observed Baryonic Tully-Fisher Relation (BTFR) from the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) and HI-MaNGA surveys to a simulated BTFR from the cosmological magnetohydrodynamical simulation IllustrisTNG. To do so, we calibrate the BTFR of the local universe using 377 galaxies from the MaNGA and HI-MaNGA surveys, and perform mock 21 cm observations of matching galaxies from IllustrisTNG. The mock observations are used to ensure that the comparison with the observed galaxies is fair since it has identical measurement algorithms, observational limitations, biases and uncertainties. For comparison, we also calculate the BTFR for the simulation without mock observations, and demonstrate how mock observations are necessary to fairly and consistently compare between observational and theoretical data. We report a MaNGA BTFR of log$_{10} (M_{ \rm Bary}/M_\odot)= (2.97 \pm 0.18)$ log$_{10} V_{ \rm Rot} + (4.04 \pm 0.41)\,\log_{10}{M_{\odot}}$ and an IllustrisTNG BTFR of log$_{10} (M_{ \rm Bary}/M_\odot) = (2.94 \pm 0.23$) log$_{10} V_{ \rm Rot} + (4.15 \pm 0.44)\,\log_{10}{M_{\odot}}$. Thus, MaNGA and IllustrisTNG produce BTFRs that agree within uncertainties, demonstrating that IllustrisTNG has created a galaxy population that obeys the observed relationship between mass and rotation velocity in the observed universe.

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