The MAGPI Survey: Impact of environment on the total internal mass distribution of galaxies in the last 5 Gyr

Abstract

We investigate the impact of environment on the internal mass distribution of galaxies using the Middle Ages Galaxy Properties with Integral field spectroscopy (MAGPI) survey. We use 2D resolved stellar kinematics to construct Jeans dynamical models for galaxies at mean redshift $z\sim 0.3$, corresponding to a lookback time of $3-4$ Gyr. The internal mass distribution for each galaxy is parameterised by the combined mass density slope $\gamma$ (baryons $+$ dark matter), which is the logarithmic change of density with radius. We use a MAGPI sample of 28 galaxies from low-to-mid density environments and compare to density slopes derived from galaxies in the high density Frontier Fields clusters in the redshift range $0.29<z<0.55$, corresponding to a lookback time of $\sim 5$ Gyr. We find a median density slope of $\gamma =-2.22\pm 0.05$ for the MAGPI sample, which is significantly steeper than the Frontier Fields median slope ($\gamma =-2.01\pm 0.04$), implying the cluster galaxies are less centrally concentrated in their mass distribution than MAGPI galaxies. We also compare to the distribution of density slopes from galaxies in Atlas3D at $z\sim 0$, because the sample probes a similar environmental range as MAGPI. The Atlas3D median total slope is $\gamma =-2.25\pm 0.02$, consistent with the MAGPI median. Our results indicate environment plays a role in the internal mass distribution of galaxies, with no evolution of the slope in the last 3-4 Gyr. These results are in agreement with the predictions of cosmological simulations.

Accepted for publication in MNRAS

References in corpus (36)

• Overview of the SDSS-IV MaNGA Survey: Mapping Nearby Galaxies at Apache Point Observatory
• Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
• zCOSMOS: A Large VLT/VIMOS redshift survey covering 0 < z < 3 in the COSMOS field
• Evolutionary Stellar Population Synthesis with MILES. Part I: The Base Models and a New Line Index System
• The SAURON project -- X. The orbital anisotropy of elliptical and lenticular galaxies: revisiting the (V/sigma,epsilon) diagram with integral-field stellar kinematics
• Measuring the inclination and mass-to-light ratio of axisymmetric galaxies via anisotropic Jeans models of stellar kinematics
• The Data Processing Pipeline for the MUSE Instrument
• Ram Pressure Stripping in High-Density Environments
• The SAGES Legacy Unifying Globulars and GalaxieS Survey (SLUGGS): Sample definition, methods, and initial results
• CLASH-VLT: Insights on the mass substructures in the Frontier Fields Cluster MACS J0416.1-2403 through accurate strong lens modeling
• The SL2S Galaxy-scale Lens Sample. II. Cosmic evolution of dark and luminous mass in early-type galaxies
• Truncation of galaxy dark matter halos in high density environments
• The Dependence of the Mass Assembly History of Cold Dark Matter Halos on Environment
• The Preferential Tidal Stripping of Dark Matter versus Stars in Galaxies
• Small scatter and nearly-isothermal mass profiles to four half-light radii from two-dimensional stellar dynamics of early-type galaxies
• Extending the evolution of the stellar mass-size relation at $z\le 2$ to low stellar mass galaxies from HFF and CANDELS
• Galaxy And Mass Assembly (GAMA): Assimilation of KiDS into the GAMA database
• Discovery of the largest known lensed images formed by a critically convergent lensing cluster
• The effect of the environment on the stellar mass - size relation of present-day galaxies
• New high-precision strong lensing modeling of Abell 2744. Preparing for JWST observations
• On the occurrence of galaxy harassment
• Systematic trends in total-mass profiles from dynamical models of early-type galaxies
• Probing the truncation of galaxy dark matter halos in high density environments from hydrodynamical N-body simulations
• The MAGPI Survey -- science goals, design, observing strategy, early results and theoretical framework
• The ALHAMBRA survey: Accurate merger fractions by PDF analysis of photometric close pairs
• Abundance ratios and IMF slope in the dwarf elliptical galaxy NGC~1396 with MUSE
• Abell 1367: a high fraction of late-type galaxies displaying HI morphological and kinematic perturbations
• Galaxy Merger Fractions in Two Clusters at $z\sim 2$ Using the Hubble Space Telescope
• Early-type galaxy density profiles from IllustrisTNG: II. Evolutionary trend of the total density profile
• Abell 2744: Too much substructure for Lambda CDM?
• The Dynamical Mass of the Coma Cluster from Deep Learning
• Total mass density slopes of early-type galaxies using Jeans dynamical modelling at redshifts $0.29<z<0.55$
• Pilot-WINGS: An extended MUSE view of the structure of Abell 370
• Observational Evidence of Evolving Dark Matter Profiles at $z\le 1$
• Galaxy and Mass Assembly (GAMA): Formation and Growth of Elliptical Galaxies in the Group Environment
• The zCOSMOS redshift survey : Influence of luminosity, mass and environment on the galaxy merger rate

Cited by in corpus (5)

• Strong Lensing by Galaxies
• AGEL: Is the Conflict Real? Investigating Galaxy Evolution Models using Strong Lensing at 0.3 < z < 0.9
• Total mass slopes and enclosed mass constrained by globular cluster system dynamics
• Is there a tilt in the fundamental (hyper)plane?
• Systematics in ETG Mass Profile Modelling: Strong Lensing & Stellar Dynamics