Merger histories of brightest group galaxies from MUSE stellar kinematics

Abstract

Using Multi-Unit Spectroscopic Explorer (MUSE) spectroscopy, we analyse the stellar kinematics of 18 brightest group early-type (BGEs) galaxies, selected from the Complete Local-Volume Groups Sample (CLoGS). We analyse the kinematic maps for distinct features, and measure specific stellar angular momentum within one effective radius (${\lambda }_e$). We classify the BGEs as fast (10/18) or slow (8/18) rotators, suggesting at least two different evolution paths. We quantify the anti-correlation between higher-order kinematic moment $h_3$ and V/$\sigma$ (using the ${\xi }_3$ parameter), and the kinematic misalignment angle between the photometric and kinematic position angles (using the $\Psi$ parameter), and note clear differences between these parameter distributions of the fast and slow rotating BGEs. We find that all 10 of our fast rotators are aligned between the morphological and kinematical axis, consistent with an oblate galaxy shape, whereas the slow rotators are spread over all three classes: oblate (1/8), triaxial (4/8), and prolate (3/8). We place the results into context using known radio properties, X-ray properties, and observations of molecular gas. We find consistent merger histories inferred from observations for the fast-rotating BGEs, indicating that they experienced gas-rich mergers or interactions, and these are very likely the origin of the cold gas. Observational evidence for the slow rotators are consistent with gas-poor mergers. For the slow rotators with cold gas, all evidence point to cold gas cooling from the intragroup medium.

Accepted for publication in MNRAS

References in corpus (66)

• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• The hierarchical formation of the brightest cluster galaxies
• Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
• 3D-HST+CANDELS: The Evolution of the Galaxy Size-Mass Distribution since $z=3$
• Formation of Massive Galaxies at High Redshift: Cold Streams, Clumpy Disks and Compact Spheroids
• HyperLEDA. III. The catalogue of extragalactic distances
• The MUSE second-generation VLT instrument
• The SAURON project -- IX. A kinematic classification for early-type galaxies
• The SAURON project -- X. The orbital anisotropy of elliptical and lenticular galaxies: revisiting the (V/sigma,epsilon) diagram with integral-field stellar kinematics
• Kinematic Structure of Merger Remnants
• Evolutionary stellar population synthesis with MILES - II. Scaled-solar and α-enhanced models
• The MUSE Hubble Ultra Deep Field Survey: I. Survey description, data reduction and source detection
• The MASSIVE Survey - I. A Volume-Limited Integral-Field Spectroscopic Study of the Most Massive Early-Type Galaxies within 108 Mpc
• The SAURON project - XII. Kinematic substructures in early-type galaxies: evidence for disks in fast rotators
• Morphology and star formation in IllustrisTNG: the build-up of spheroids and discs
• The SAMI Galaxy Survey: Revisiting Galaxy Classification Through High-Order Stellar Kinematics
• Stellar kinematics across the Hubble sequence in the CALIFA survey: General properties and aperture corrections
• 2-Dimensional Kinematics of Simulated Disc Merger Remnants
• The Atlas3D project - XXIV. The intrinsic shape distribution of early-type galaxies
• The MASSIVE Survey - V. Spatially-Resolved Stellar Angular Momentum, Velocity Dispersion, and Higher Moments of the 41 Most Massive Local Early-Type Galaxies
• The WISE Extended Source Catalogue (WXSC) I: The 100 Largest Galaxies
• The Fornax 3D project: unveiling the thick disk origin in FCC 170: signs of accretion?
• Simulating Groups and the IntraGroup Medium: The Surprisingly Complex and Rich Middle Ground Between Clusters and Galaxies
• Scaling Properties of Galaxy Groups
• The Complete Local Volume Groups Sample - I. Sample Selection and X-ray Properties of the High-Richness Subsample
• Probing the merger history of red early-type galaxies with their faint stellar substructures
• Census and classification of low-surface-brightness structures in nearby early-type galaxies from the MATLAS survey
• The SAMI Pilot Survey: The Kinematic Morphology-Density Relation in Abell 85, Abell 168 and Abell 2399
• Distribution of Slow and Fast Rotators in the Fornax Cluster
• The MASSIVE Survey - VIII. Stellar Velocity Dispersion Profiles and Environmental Dependence of Early-Type Galaxies
• The origin of the atomic and molecular gas contents of early-type galaxies. II. Misaligned gas accretion
• Fast and slow rotators in the densest environments: a FLAMES/GIRAFFE IFS study of galaxies in Abell 1689 at z=0.183
• Radial kinematics of brightest cluster galaxies
• Black Hole Mass Measurements of Radio Galaxies NGC 315 and NGC 4261 Using ALMA CO Observations
• The stellar halos of ETGs in the IllustrisTNG simulations: the photometric and kinematic diversity of galaxies at large radii
• The origin and properties of massive prolate galaxies in the Illustris simulation
• Building gas rings and rejuvenating S0 galaxies through minor mergers
• The diverse nature and formation paths of slow rotator galaxies in the EAGLE simulations
• Simulating multiple merger pathways to the central kinematics of early-type galaxies
• The SAMI Galaxy Survey: the intrinsic shape of kinematically selected galaxies
• Cold gas in group-dominant elliptical galaxies
• The SAMI Galaxy Survey: a statistical approach to an optimal classification of stellar kinematics in galaxy surveys
• Stellar orbits in cosmological galaxy simulations: the connection to formation history and line-of-sight kinematics
• The two formation pathways of S0 galaxies
• A MeerKAT view of pre-processing in the Fornax A group
• Abundance ratios and IMF slope in the dwarf elliptical galaxy NGC~1396 with MUSE
• Probing the kinematic morphology-density relation of early-type galaxies with MaNGA
• Integral field spectroscopy of ionized and molecular gas in cool cluster cores: evidence for cold feedback?
• CALIFA reveals Prolate Rotation in Massive Early-type Galaxies: A Polar Galaxy Merger Origin?
• Line-of-sight velocity distributions of elliptical galaxies from collisionless mergers
• Galaxies with prolate rotation in Illustris
• The SAMI Galaxy Survey: Mass and Environment as Independent Drivers of Galaxy Dynamics
• Kinematic analysis of EAGLE simulations: Evolution of ${\lambda }_{Re}$ and its connection with mergers and gas accretion
• Accurate Identification of Galaxy Mergers with Stellar Kinematics
• Evidence for Impact of Galaxy Mergers on Stellar Kinematics of Early-type Galaxies
• SDSS-IV MaNGA : spatial resolved properties of kinematically misaligned galaxies
• Prospects for Recovering Galaxy Intrinsic Shapes from Projected Quantities
• Mapping Accreted Stars in Early-Type Galaxies Across the Mass-Size Plane
• Star-Gas Misalignment in Galaxies: II. Origins Found from the Horizon-AGN Simulation
• Atacama Compact Array Measurements of the Molecular Mass in the NGC 5044 Cooling Flow Group
• Dynamical masses of brightest cluster galaxies I: stellar velocity anisotropy and mass-to-light ratios
• The Complete Local Volume Groups Sample -- IV. Star formation and gas content in group-dominant galaxies
• The Stellar Mass Assembly of Low Redshift, Massive, Central Galaxies in SDSS and the TNG300 simulation
• The SAMI Galaxy Survey: Kinematics of stars and gas in brightest group galaxies; the role of group dynamics
• Ubiquitous signs of interactions in early-type galaxies with prolate rotation
• Galaxy And Mass Assembly (GAMA) Survey: The Merging Potential of Brightest Group Galaxies

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• COSMOS Brightest Group Galaxies -- III: Evolution of stellar ages
• Intracluster light is a biased tracer of the dark matter distribution in clusters
• The formation channels of multiphase gas in nearby early-type galaxies
• Elliptical (E) and ellicular (ES) galaxies in the M_bh-M_*,sph diagram, and a merger-driven explanation for the origin of ES galaxies, anti-truncated stellar discs in lenticular galaxies, and the Sersicification of E galaxy light profiles
• Multi-spin stellar velocity maps of the most massive galaxies
• Forged by Feedback: Stellar Properties of Brightest Group Galaxies in Cosmological Simulations
• The kinematic imprinting of environmental quenching in $z<0.2$ galaxies
• The relationship between warm and hot gas-phase metallicity in massive elliptical galaxies and the influence of AGN feedback