TY - JOUR
T1 - Different higher order kinematics between star-forming and quiescent galaxies based on the SAMI, MAGPI, and LEGA-C surveys
AU - D'Eugenio, Francesco
AU - van der Wel, Arjen
AU - Derkenne, Caro
AU - Van Houdt, Josha
AU - Bezanson, Rachel
AU - Taylor, Edward N.
AU - van de Sande, Jesse
AU - Baker, William M.
AU - Bell, Eric F.
AU - Bland-Hawthorn, Joss
AU - Bluck, Asa F. L.
AU - Brough, Sarah
AU - Bryant, Julia J.
AU - Colless, Matthew
AU - Cortese, Luca
AU - Croom, Scott M.
AU - van Dokkum, Pieter
AU - Fisher, Deanne
AU - Foster, Caroline
AU - Fraser-Mckelvie, Amelia
AU - Gallazzi, Anna
AU - de Graaff, Anna
AU - Groves, Brent
AU - del P. Lagos, Claudia
AU - Looser, Tobias J.
AU - Maiolino, Roberto
AU - Maseda, Michael
AU - Mendel, J. Trevor
AU - Nersesian, Angelos
AU - Pacifici, Camilla
AU - Piotrowska, Joanna M.
AU - Poci, Adriano
AU - Remus, Rhea Silvia
AU - Sharma, Gauri
AU - Sweet, Sarah M.
AU - Thater, Sabine
AU - Tran, Kim Vy
AU - Übler, Hannah
AU - Valenzuela, Lucas M.
AU - Wisnioski, Emily
AU - Zibetti, Stefano
PY - 2023/10/1
Y1 - 2023/10/1
N2 - 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⋆ > 1010.5 M⊙) 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.
AB - 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⋆ > 1010.5 M⊙) 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.
KW - galaxies: elliptical and lenticular, cD
KW - galaxies: evolution
KW - galaxies: formation
KW - galaxies: fundamental parameters
KW - galaxies: structure
UR - http://www.scopus.com/inward/record.url?scp=85172904155&partnerID=8YFLogxK
U2 - 10.1093/mnras/stac3536
DO - 10.1093/mnras/stac3536
M3 - Article
AN - SCOPUS:85172904155
SN - 0035-8711
VL - 525
SP - 2765
EP - 2788
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 2
ER -