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Durham University

Department of Physics

Staff profile

Publication details for Prof Richard Bower

Tiley, A. L. , Bureau, M. Cortese, L. Harrison, C. M. , Johnson, H. L. , Stott, J. P. Swinbank, A. M. , Smail, I. , Sobral, D. Bunker, A. J. Glazebrook, K. Bower, R. G. , Obreschkow D. Bryant, J. J. Jarvis, M. J. Bland-Hawthorn, J. Magdis, G. Medling, A. M. Sweet, S. M. Tonini, C. Turner, O. J. Sharples, R. M. , Croom, S. M. Goodwin, M., Konstantopoulos, I. S., Lorente, N. P. F. Lawrence, J. S. Mould, J., Owers, M. S. & Richards, S. N. (2019). KROSS-SAMI: A Direct IFS Comparison of the Tully-Fisher Relation Across 8 Gyr Since z ≈ 1. Monthly Notices of the Royal Astronomical Society 482(2): 2166–2188.

Author(s) from Durham


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.