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KROSS-SAMI: A direct IFS comparison of the Tully-Fisher relation across 8 Gyr since z ≈ 1

Lookup NU author(s): Dr Christopher HarrisonORCiD



This is the final published version of an article that has been published in its final definitive form by Oxford University Press, 2019.

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© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.We construct Tully-Fisher relations (TFRs), from large samples of galaxies with spatially resolved H α emission maps from the K-band Multi-Object Spectrograph (KMOS) Redshift One Spectroscopic Survey (KROSS) at z ≈ 1. We compare these to data from the Sydney-Australian-Astronomical-Observatory Multi-object Integral-Field Spectrograph (SAMI) Galaxy Survey at z ≈ 0. We stringently match the data quality of the latter to the former, and apply identical analysis methods and sub-sample selection criteria to both to conduct a direct comparison of the absolute K-band magnitude and stellar mass TFRs at z ≈ 1 and 0. We find that matching the quality of the SAMI data to that of KROSS results in TFRs that differ significantly in slope, zero-point, and (sometimes) scatter in comparison to the corresponding original SAMI relations. These differences are in every case as large as or larger than the differences between the KROSS z ≈ 1 and matched SAMI z ≈ 0 relations. Accounting for these differences, we compare the TFRs at z ≈ 1 and 0. For disc-like, star-forming galaxies we find no significant difference in the TFR zero-points between the two epochs. This suggests the growth of stellar mass and dark matter in these types of galaxies is intimately linked over this ≈8 Gyr period.

Publication metadata

Author(s): Tiley AL, Bureau M, Cortese L, Harrison CM, Johnson HL, Stott JP, Swinbank AM, Smail I, Sobral D, Bunker AJ, Glazebrook K, Bower RG, Obreschkow D, Bryant JJ, Jarvis MJ, Bland-Hawthorn J, Magdis G, Medling AM, Sweet SM, Tonini C, Turner OJ, Sharples RM, Croom SM, Goodwin M, Konstantopoulos IS, Lorente NPF, Lawrence JS, Mould J, Owers MS, Richards SN

Publication type: Article

Publication status: Published

Journal: Monthly Notices of the Royal Astronomical Society

Year: 2019

Volume: 482

Issue: 2

Pages: 2166-2188

Print publication date: 01/01/2019

Online publication date: 17/10/2018

Acceptance date: 15/10/2018

Date deposited: 04/02/2020

ISSN (print): 0035-8711

ISSN (electronic): 1365-2966

Publisher: Oxford University Press


DOI: 10.1093/mnras/sty2794


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