Different higher order kinematics between star-forming and quiescent galaxies based on the SAMI, MAGPI, and LEGA-C surveys

D’Eugenio, Francesco; van der Wel, Arjen; Derkenne, Caro; van Houdt, Josha; Bezanson, Rachel; Taylor, Edward N; van de Sande, Jesse; Baker, William M; Bell, Eric F; Bland-Hawthorn, Joss; Bluck, Asa F L; Brough, Sarah; Bryant, Julia J; Colless, Matthew; Cortese, Luca; Croom, Scott M; van Dokkum, Pieter; Fisher, Deanne; Foster, Caroline; Fraser-McKelvie, Amelia; Gallazzi, Anna; de Graaff, Anna; Groves, Brent; del P. Lagos, Claudia; Looser, Tobias J; Maiolino, Roberto; Maseda, Michael; Mendel, J Trevor; Nersesian, Angelos; Pacifici, Camilla; Piotrowska, Joanna M; Poci, Adriano; Remus, Rhea-Silvia; Sharma, Gauri; Sweet, Sarah M; Thater, Sabine; Tran, Kim-Vy; Übler, Hannah; Valenzuela, Lucas M; Wisnioski, Emily; Zibetti, Stefano

Abstract

We present the first statistical study of spatially integrated non-Gaussian stellar kinematics spanning 7 Gyr in cosmic time. We use deep, rest-frame optical spectroscopy of massive galaxies (stellar mass
⁠) at redshifts z = 0.05, 0.3, and 0.8 from the SAMI, MAGPI, and LEGA-C surveys, to measure the excess kurtosis h4 of the stellar velocity distribution, the latter parametrized as a Gauss–Hermite series. We find that at all redshifts where we have large enough samples, h4 anticorrelates with the ratio between rotation and dispersion, highlighting the physical connection between these two kinematic observables. In addition, and independently from the anticorrelation with rotation-to-dispersion ratio, we also find a correlation between h4 and M⋆, potentially connected to the assembly history of galaxies. In contrast, after controlling for mass, we find no evidence of independent correlation between h4 and aperture velocity dispersion or galaxy size. These results hold for both star-forming and quiescent galaxies. For quiescent galaxies, h4 also correlates with projected shape, even after controlling for the rotation-to-dispersion ratio. At any given redshift, star-forming galaxies have lower h4 compared to quiescent galaxies, highlighting the link between kinematic structure and star-forming activity.

Citation

D’Eugenio, F., van der Wel, A., Derkenne, C., van Houdt, J., Bezanson, R., Taylor, E. N., …Zibetti, S. (2023). Different higher order kinematics between star-forming and quiescent galaxies based on the SAMI, MAGPI, and LEGA-C surveys. Monthly Notices of the Royal Astronomical Society, 525(2), 2765-2788. https://doi.org/10.1093/mnras/stac3536

• Journal Article Type: Article
• Acceptance Date: Nov 22, 2022
• Online Publication Date: Aug 29, 2023
• Publication Date: 2023-10
• Deposit Date: Jan 24, 2024
• Publicly Available Date: Jan 24, 2024
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Electronic ISSN: 1365-2966
• Publisher: Royal Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 525
• Issue: 2
• Pages: 2765-2788
• DOI: https://doi.org/10.1093/mnras/stac3536
• Keywords: Space and Planetary Science; Astronomy and Astrophysics
• Public URL: https://durham-repository.worktribe.com/output/2163027