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

  • Alfred Tiley (Durham University, University of Oxford) (Creator)
  • Martin Bureau (Creator)
  • Luca Cortese (Creator)
  • Chris M. Harrison (Creator)
  • H. L. Johnson (Creator)
  • John P. Stott (Creator)
  • A. M. Swinbank (Creator)
  • Ian Smail (Creator)
  • David Sobral (Creator)
  • A. J. Bunker (Creator)
  • K. Glazebrook (Creator)
  • R. G. Bower (Creator)
  • Danail Obreschkow (Creator)
  • Julia J. Bryant (Creator)
  • M. J. Jarvis (Creator)
  • Joss Bland-Hawthorn (Creator)
  • Georgios E. Magdis (Creator)
  • Anne M. Medling (Creator)
  • Sarah M. Sweet (Creator)
  • C. Tonini (Creator)



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.
Date made availableJan 2019
PublisherSAO/NASA Astrophysics Data System (ADS)


  • galaxies: evolution
  • galaxies: general
  • galaxies: kinematics and dynamics
  • galaxies: star formation
  • Astrophysics - Astrophysics of Galaxies

Cite this