MIGHTEE-H i: the baryonic Tully–Fisher relation over the last billion years

Author:

Ponomareva Anastasia A1ORCID,Mulaudzi Wanga2,Maddox Natasha3ORCID,Frank Bradley S245,Jarvis Matt J16ORCID,Teodoro Enrico M Di78,Glowacki Marcin69,Kraan-Korteweg Renée C2,Oosterloo Tom A1011,Adams Elizabeth A K1011,Pan Hengxing16ORCID,Prandoni Isabella12ORCID,Rajohnson Sambatriniaina H A2,Sinigaglia Francesco1314,Adams Nathan J1ORCID,Heywood Ian1415,Bowler Rebecca A A1ORCID,Hatfield Peter W1ORCID,Collier Jordan D51617,Sekhar Srikrishna5618ORCID

Affiliation:

1. Oxford Astrophysics, Denys Wilkinson Building, University of Oxford, Keble Rd, Oxford OX1 3RH, UK

2. Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa

3. Faculty of Physics, Ludwig-Maximilians-Universität, Scheinerstr 1, D-81679 Munich, Germany

4. South African Radio Astronomy Observatory, 2 Fir Street, Observatory, Cape Town 7925, South Africa

5. The Inter-University Institute for Data Intensive Astronomy (IDIA), and University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa

6. Department of Physics and Astronomy, University of the Western Cape, Robert Sobukwe Road, Bellville 7535, South Africa

7. Department of Physics & Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA

8. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA

9. Inter-University Institute for Data Intensive Astronomy, Bellville 7535, South Africa

10. ASTRON, the Netherlands Institute for Radio Astronomy, Oude Hoogeveesedijk 4, NL-7991 PD Dwingeloo, the Netherlands

11. Kapteyn Astronomical Institute, PO Box 800, NL-9700 AV Groningen, the Netherlands

12. INAF-IRA, Via P. Gobetti 101, I-40129 Bologna, Italy

13. Department of Physics and Astronomy, Universitá degli Studi di Padova, Vicolo dell’Osservatorio 3, I-35122 Padova, Italy

14. INAF - Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, I-35122 Padova, Italy

15. Department of Physics and Electronics, Rhodes University, PO Box 94, Makhanda 6140, South Africa

16. School of Science, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia

17. CSIRO Astronomy and Space Science, PO Box 1130, Bentley, WA 6102, Australia

18. National Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USA

Abstract

ABSTRACT 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.

Funder

National Research Council

CNRS

ESO

University of Hawaii

National Astronomical Observatory of Japan

University of Tokyo

Japan Society for the Promotion of Science

Japan Science and Technology Agency

STFC

Science and Technology Facilities Council

Netherlands Organisation for Scientific Research

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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