KROSS-SAMI: a direct IFS comparison of the Tully-Fisher relation across 8 Gyr since z approximate to 1
We construct Tully-Fisher relations (TFRs), from large samples of galaxies with spatially-resolved H alpha emission maps from the K-band Multi-Object Spectrograph (KMOS) Redshift One Spectroscopic Survey (KROSS) at z approximate to 1. We compare these to data from the Sydney-Australian-Astronomical-...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Oxford University Press
2019
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Subjects: | |
Online Access: | https://espace.library.uq.edu.au/view/UQ:5cf490a/thumbnail_UQ5cf490a_OA_t.jpg https://espace.library.uq.edu.au/view/UQ:5cf490a/UQ5cf490a_OA.pdf https://espace.library.uq.edu.au/view/UQ:5cf490a |
Summary: | We construct Tully-Fisher relations (TFRs), from large samples of galaxies with spatially-resolved H alpha emission maps from the K-band Multi-Object Spectrograph (KMOS) Redshift One Spectroscopic Survey (KROSS) at z approximate to 1. We compare these to data from the Sydney-Australian-Astronomical-Observatory Multi-object Integral-Field Spectrograph (SAMI) Galaxy Survey at z approximate to 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 approximate to 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 or larger than the differences between the KROSS z approximate to 1 and matched SAMI z approximate to 0 relations. Accounting for these differences, we compare the TFRs at z approximate to 1 and 0. For disk-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 approximate to 8 Gyr period. |
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