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

A. L. Tiley, M. Bureau, L. Cortese, C. M. Harrison, H. L. Johnson, J. P. Stott, A. M. Swinbank, I. Smail, D. Sobral, A. J. Bunker, K. Glazebrook, R. G. Bower, D. Obreschkow, J. J. Bryant, M. J. Jarvis, J. Bland-Hawthorn, G. Magdis, A. M. Medling, S. M. Sweet, C. ToniniO. J. Turner, R. M. Sharples, S. M. Croom, M. Goodwin, I. S. Konstantopoulos, N. P. F. Lorente, J. S. Lawrence, J. Mould, M. S. Owers, S. N. Richards

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31 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)2166-2188
Number of pages23
JournalMonthly Notices of the Royal Astronomical Society
Issue number2
Publication statusPublished - Jan 2019


  • galaxies: evolution
  • galaxies: general
  • galaxies: kinematics and dynamics
  • galaxies: star formation


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