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

• Main Authors: 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, Lagos, Claudia del P., 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
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: arXiv 2023
• Subjects: Astrophysics of Galaxies astro-ph.GA; FOS Physical sciences; sami
• Online Access: https://dx.doi.org/10.48550/arxiv.2303.04157; https://arxiv.org/abs/2303.04157

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 $M_\star > 10^{10.5} {\rm M}_\odot$) at redshifts z = 0.05, 0.3 and 0.8 from the SAMI, MAGPI and LEGA-C surveys, to measure the excess kurtosis $h_4$ of the stellar velocity distribution, the latter parametrised as a Gauss-Hermite series. We find that at all redshifts where we have large enough samples, $h_4$ anti-correlates with the ratio between rotation and dispersion, highlighting the physical connection between these two kinematic observables. In addition, and independently from the anti-correlation with rotation-to-dispersion ratio, we also find a correlation between $h_4$ and $M_\star$, potentially connected to the assembly history of galaxies. In contrast, after controlling for mass, we find no evidence of independent correlation between $h_4$ and aperture velocity dispersion or galaxy size. ... : 26 pages, 15 figures Accepted for publication in MNRAS ...