The SAMI Galaxy Survey: Mass as the Driver of the Kinematic Morphology-Density Relation in Clusters ...

• Main Authors: Brough, Sarah, Van De Sande, Jesse, Owers, Matt S., D'Eugenio, Francesco, Sharp, Rob, Cortese, Luca, Scott, Nicholas, Croom, Scott M., Bassett, Robert, Bekki, Kenji, Bland-Hawthorn, Joss, Bryant, Julia J., Davies, Roger, Drinkwater, Michael J., Driver, Simon P., Foster, Caroline, Goldstein, Gregory, López-Sánchez, R., Medling, Anne M., Sweet, Sarah, Taranu, Dan S., Tonini, Chiara, Yi, Sukyoung K., Goodwin, Michael, Lawrence, J. S., Richards, Samuel N.
• Format: Text
• Language: unknown
• Published: Swinburne 2024
• Subjects: Cosmology and extragalactic astronomy; sami
• Online Access: https://dx.doi.org/10.25916/sut.26244764; https://figshare.swinburne.edu.au/articles/journal_contribution/The_SAMI_Galaxy_Survey_Mass_as_the_Driver_of_the_Kinematic_Morphology-Density_Relation_in_Clusters/26244764

We examine the kinematic morphology of early-type galaxies (ETGs) in eight galaxy clusters in the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey. The clusters cover a mass range of 14.2〈log(M_200/M_sun)〈15.2 and we measure spatially-resolved stellar kinematics for 293 cluster members within 1R_200 of the cluster centers. We calculate the spin parameter, lambda_R for these galaxies and use that to classify the kinematic morphology of the galaxies as fast (high spin parameter) or slow (low spin parameter) rotators. The total fraction of slow rotators in the early-type galaxy population, F_SR=0.14+/-0.02 and does not depend on host cluster mass. Across the eight clusters, the fraction of slow rotators increases with increasing local environmental overdensity. We also find that the slow-rotator fraction increases at small clustercentric radii (R_cl〈0.3R_200), and note that there is also an enhancement in slow-rotator fraction at R_cl~0.6R_200 in cluster substructure. We find the ...