The redshift evolution of the baryonic Tully-Fisher relation in Simba

Abstract

The baryonic Tully-Fisher relation (BTFR) is an important tool for constraining galaxy evolution models. As 21-cm HI emission studies have been largely restricted to low redshifts, the redshift evolution of the BTFR is less studied. The upcoming LADUMA survey (Looking At the Distant Universe with the MeerKAT Array) will address this. As preparation for LADUMA, we use the Simba hydrodynamical galaxy formation simulation from the Simba-hires (25 h${}^{-1}$ Mpc)${}^3$ run to generate rotational velocity measures from galaxy rotation curves ($V_{\mathrm{flat}}$) and HI spectral line profile widths ($W_{50}$ and $W_{20}$) at three different redshifts ($z$ = 0, 0.5, and 1). Using these measures, together with the dark matter velocity dispersion and halo mass, we consider the redshift evolution of the BTFR of Simba galaxies. We find that LADUMA will be successful in detecting weak redshift evolution of the BTFR, provided that auxiliary data is used to distinguish galaxies with disky morphologies. $W_{20}$ spectral line widths give lower scatter and more pronounced redshift evolution compared to $W_{50}$. We also compare these rotational velocity measures to the dark matter velocity dispersion across redshift and galaxy morphology. We find weak redshift evolution between rotational velocity and the dark matter halo mass, and provide fits for estimating a galaxy's dark matter halo mass from HI spectral line widths. This study with Simba showcases the importance of upcoming, deep SKA pathfinder surveys such as LADUMA, and provides predictions to compare with redshift evolution of the BTFR and galaxy dark matter content from HI rotational velocity measures.

19 pages, 10 figures, 4 tables. Accepted for publication to MNRAS

References in corpus (10)

• Simba: Cosmological Simulations with Black Hole Growth and Feedback
• IMAGES-III: The evolution of the Near-Infrared Tully-Fisher relation over the last 6 Gyr
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• The high mass end of the Tully-Fisher relation
• The Multi-Wavelength Tully-Fisher relation with spatially resolved HI kinematics
• The MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) Survey
• The Tully-Fisher relation and its evolution with redshift in cosmological simulations of disc galaxy formation
• The Radio Galaxy Population in the SIMBA SImulations
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Cited by in corpus (14)

• How baryons affect halos and large-scale structure: a unified picture from the Simba simulation
• MIGHTEE-HI: The baryonic Tully-Fisher relation over the last billion years
• A Comparison of the Baryonic Tully-Fisher Relation in MaNGA and IllustrisTNG
• The role of gas kinematics in setting metallicity gradients at high redshift
• MARTINI: Mock Array Radio Telescope Interferometry of the Neutral ISM
• BUDHIES V: The baryonic Tully-Fisher relation at z=0.2 based on direct HI detections
• Measuring the baryonic Tully-Fisher relation below the detection threshold
• ASymba: HI global profile asymmetries in the Simba simulation
• Inferring dark matter halo properties for HI-selected galaxies
• A Generalist, Automated ALFALFA Baryonic Tully-Fisher Relation
• Measurements of the angular momentum-mass relations in the Simba simulation
• MIGHTEE-HI: The direct detection of neutral hydrogen in galaxies at $z>0.25$
• The multi-wavelength Tully-Fisher relation in the TNG50 cosmological simulation
• MUSE-DARK-II: 3D morpho-kinematic modelling of lensed galaxies. Tully-Fisher relation of $z\sim 1$ star-forming galaxies