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

• Main Authors: D'eugenio, F, Van Der Wel, A, Derkenne, C, Van Houdt, J, Bezanson, R, Taylor, EN, Van De Sande, J, Baker, WM, Bell, EF, Bland-Hawthorn, J, Bluck, AFL, Brough, S, Bryant, JJ, Colless, M, Cortese, L, Croom, SM, Van Dokkum, P, Fisher, D, Foster, C, Fraser-Mckelvie, A, Gallazzi, A, De Graaff, A, Groves, B, Del P. Lagos, C, Looser, TJ, Maiolino, R, Maseda, M, Mendel, JT, Nersesian, A, Pacifici, C, Piotrowska, JM, Poci, A, Remus, RS, Sharma, G, Sweet, SM, Thater, S, Tran, KV, Übler, H, Valenzuela, LM, Wisnioski, E, Zibetti, S
• Format: Article in Journal/Newspaper
• Language: English
• Published: Oxford University Press (OUP) 2023
• Subjects: 5101 Astronomical Sciences; 51 Physical Sciences; sami
• Online Access: https://dx.doi.org/10.17863/cam.96912; https://www.repository.cam.ac.uk/handle/1810/350303

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 $M_\star \gt 10^{10.5} \, \mathrm{M_\odot }$) at redshifts z = 0.05, 0.3, and 0.8 from the SAMI, MAGPI, and LEGA-C surveys, to measure the excess kurtosis 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 ...