MIGHTEE-H i: the baryonic Tully–Fisher relation over the last billion years,Monthly Notices of the Royal Astronomical Society

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MIGHTEE-H i: the baryonic Tully–Fisher relation over the last billion years
Monthly Notices of the Royal Astronomical Society ( IF 4.8 ) Pub Date : 2021-09-14 , DOI: 10.1093/mnras/stab2654
Anastasia A Ponomareva ₁ , Wanga Mulaudzi ₂ , Natasha Maddox ₃ , Bradley S Frank _{2,

4,

5} , Matt J Jarvis _{1,

6} , Enrico M Di Teodoro _{7,

8} , Marcin Glowacki _{6,

9} , Renée C Kraan-Korteweg ₂ , Tom A Oosterloo _{10,

11} , Elizabeth A K Adams _{10,

11} , Hengxing Pan _{1,

6} , Isabella Prandoni ₁₂ , Sambatriniaina H A Rajohnson ₂ , Francesco Sinigaglia _{13,

14} , Nathan J Adams ₁ , Ian Heywood _{1,

4,

15} , Rebecca A A Bowler ₁ , Peter W Hatfield ₁ , Jordan D Collier _{5,

16,

17} , Srikrishna Sekhar _{5,

6,

18}

Affiliation

Oxford Astrophysics, Denys Wilkinson Building, University of Oxford, Keble Rd, Oxford OX1 3RH, UK
Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
Faculty of Physics, Ludwig-Maximilians-Universität, Scheinerstr 1, D-81679 Munich, Germany
South African Radio Astronomy Observatory, 2 Fir Street, Observatory, Cape Town 7925, South Africa
The Inter-University Institute for Data Intensive Astronomy (IDIA), and University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
Department of Physics and Astronomy, University of the Western Cape, Robert Sobukwe Road, Bellville 7535, South Africa
Department of Physics & Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
Inter-University Institute for Data Intensive Astronomy, Bellville 7535, South Africa
ASTRON, the Netherlands Institute for Radio Astronomy, Oude Hoogeveesedijk 4, NL-7991 PD Dwingeloo, the Netherlands
Kapteyn Astronomical Institute, PO Box 800, NL-9700 AV Groningen, the Netherlands
INAF-IRA, Via P. Gobetti 101, I-40129 Bologna, Italy
Department of Physics and Astronomy, Universitá degli Studi di Padova, Vicolo dell’Osservatorio 3, I-35122 Padova, Italy
INAF - Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, I-35122 Padova, Italy
Department of Physics and Electronics, Rhodes University, PO Box 94, Makhanda 6140, South Africa
School of Science, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
CSIRO Astronomy and Space Science, PO Box 1130, Bentley, WA 6102, Australia
National Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USA

Using a sample of 67 galaxies from the MeerKAT International GigaHertz Tiered Extragalactic Exploration Survey Early Science data, we study the H i-based baryonic Tully–Fisher relation (bTFr), covering a period of ∼1 billion years (0 ≤ z ≤ 0.081). We consider the bTFr based on two different rotational velocity measures: the width of the global H i profile and Vout, measured as the outermost rotational velocity from the resolved H i rotation curves. Both relations exhibit very low intrinsic scatter orthogonal to the best-fitting relation (σ⊥ = 0.07 ± 0.01), comparable to the SPARC sample at z ≃ 0. The slopes of the relations are similar and consistent with the z ≃ 0 studies ($3.66^{+0.35}_{-0.29}$ for W50 and $3.47^{+0.37}_{-0.30}$ for Vout). We find no evidence that the bTFr has evolved over the last billion years, and all galaxies in our sample are consistent with the same relation independent of redshift and the rotational velocity measure. Our results set-up a reference for all future studies of the H i-based bTFr as a function of redshift that will be conducted with the ongoing deep SKA pathfinders surveys.

中文翻译：

MIGHTEE-H i：过去十亿年的重子 Tully-Fisher 关系

我们使用来自 MeerKAT 国际 GigaHertz 分层河外探索调查早期科学数据的 67 个星系样本，研究基于 H i 的重子 Tully-Fisher 关系 (bTFr)，涵盖约 10 亿年 (0 ≤ z ≤ 0.081) . 我们基于两种不同的旋转速度测量来考虑 bTFr：全局 H i 轮廓的宽度和 Vout，测量为来自解析的 H i 旋转曲线的最外层旋转速度。两种关系都表现出非常低的与最佳拟合关系正交的固有散射 (σ⊥ = 0.07 ± 0.01)，与 z ≃ 0 处的 SPARC 样本相当。关系的斜率与 z ≃ 0 研究相似且一致（$3.66 ^{+0.35}_{-0.29}$ 为 W50，$3.47^{+0.37}_{-0.30}$ 为 Vout）。我们没有发现 bTFr 在过去十亿年中进化的证据，并且我们样本中的所有星系都符合相同的关系，与红移和旋转速度测量无关。我们的结果为未来所有基于 H i 的 bTFr 作为红移函数的研究提供了参考，这些研究将与正在进行的深度 SKA 探路者调查一起进行。

更新日期：2021-09-14

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