SDSS-IV MaNGA: Stellar population correlates with stellar root-mean-square velocity $V_{\mathrm{rms}}$ gradients or total-density-profile slopes at fixed effective velocity dispersion ${\sigma }_{\mathrm{e}}$

Abstract

Galaxy properties are known to correlate most tightly with the galaxy effective stellar velocity dispersion ${\sigma }_{\mathrm{e}}$. Here we look for {\em additional} trends at fixed ${\sigma }_{\mathrm{e}}$ using 1339 galaxies ($M_{\ast }\gtrsim 6\times 10^9$ M${}_{\odot }$) with different morphologies in the MaNGA (DR14) sample with integral-field spectroscopy data. We focus on the gradients (${\gamma }_{\mathrm{rms}}\equiv \sigma (R_{\mathrm{e}}/4)/{\sigma }_{\mathrm{e}}$) of the stellar root-mean-square velocity ($V_{\mathrm{rms}}\equiv \sqrt{V^2+{\sigma }^2}$), which we show traces the total mass density gradient ${\gamma }_{\mathrm{tot}}$ derived from dynamical models and, more weakly, the bulge fraction. We confirm that ${\gamma }_{\mathrm{rms}}$ increases with ${\sigma }_{\mathrm{e}}$, age and metallicity. We additionally find that these correlations still exist at fixed ${\sigma }_{\mathrm{e}}$, where galaxies with larger ${\gamma }_{\mathrm{rms}}$ are found to be older and more metal-rich. It means that mass density gradients contain information of the stellar population which is not fully accounted for by ${\sigma }_{\mathrm{e}}$. This result puts an extra constraint on our understanding of galaxy quenching. We compare our results with galaxies in the IllustrisTNG hydrodynamical simulations and find that, at fixed ${\sigma }_{\mathrm{e}}$, similar trends exist with age, the bulge fraction, and the total mass density slope but, unlike observations, no correlation with metallicity can be detected in the simulations.

arXiv comment8 pages, 6 figures; Accepted for publication in MNRAS

References in corpus (43)

• The Demography of Massive Dark Objects in Galaxy Centres
• Populating a cluster of galaxies - I. Results at z=0
• Parametric Recovery of Line-of-Sight Velocity Distributions from Absorption-Line Spectra of Galaxies via Penalized Likelihood
• First results from the IllustrisTNG simulations: matter and galaxy clustering
• First results from the IllustrisTNG simulations: the stellar mass content of groups and clusters of galaxies
• Overview of the SDSS-IV MaNGA Survey: Mapping Nearby Galaxies at Apache Point Observatory
• MILES: A Medium resolution INT Library of Empirical Spectra
• First results from the IllustrisTNG simulations: the galaxy color bimodality
• Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
• Adaptive spatial binning of integral-field spectroscopic data using Voronoi tessellations
• First results from the IllustrisTNG simulations: A tale of two elements -- chemical evolution of magnesium and europium
• The SAURON project - IV. The mass-to-light ratio, the virial mass estimator and the fundamental plane of elliptical and lenticular galaxies
• First results from the IllustrisTNG simulations: radio haloes and magnetic fields
• The Multi-Object, Fiber-Fed Spectrographs for SDSS and the Baryon Oscillation Spectroscopic Survey
• Substructures in hydrodynamical cluster simulations
• An updated MILES stellar library and stellar population models
• The Atlas3D project - XV. Benchmark for early-type galaxies scaling relations from 260 dynamical models: mass-to-light ratio, dark matter, Fundamental Plane and Mass Plane
• The Atlas3D project - XX. Mass-size and mass-sigma distributions of early-type galaxies: bulge fraction drives kinematics, mass-to-light ratio, molecular gas fraction and stellar initial mass function
• The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the extended Baryon Oscillation Spectroscopic Survey and from the second phase of the Apache Point Observatory Galactic Evolution Experiment
• A Catalog of Bulge+Disk Decompositions and Updated Photometry for 1.12 Million Galaxies in the Sloan Digital Sky Survey
• Measuring the inclination and mass-to-light ratio of axisymmetric galaxies via anisotropic Jeans models of stellar kinematics
• Efficient Multi-Gaussian Expansion of galaxies
• Structure and Kinematics of Early-Type Galaxies from Integral-Field Spectroscopy
• The MaNGA Integral Field Unit Fiber Feed System for the Sloan 2.5 m Telescope
• The Atlas3D Project - XXX. Star formation histories and stellar population scaling relations of early-type galaxies
• The Atlas3D project - VII. A new look at the morphology of nearby galaxies: the kinematic morphology-density relation
• GALEX-SDSS-WISE Legacy Catalog (GSWLC): Star Formation Rates, Stellar Masses and Dust Attenuations of 700,000 Low-redshift Galaxies
• SDSS-IV MaNGA IFS Galaxy Survey --- Survey Design, Execution, and Initial Data Quality
• The Data Analysis Pipeline for the SDSS-IV MaNGA IFU Galaxy Survey: Overview
• SDSS-IV/MaNGA: Spectrophotometric Calibration Technique
• Dissecting the Red Sequence--II. Star Formation Histories of Early-Type Galaxies Throughout the Fundamental Plane
• SDSS-IV MaNGA: Global stellar population and gradients for about 2000 early-type and spiral galaxies on the mass-size plane
• The bulge-halo conspiracy in massive elliptical galaxies: implications for the stellar initial mass function and halo response to baryonic processes
• The SAMI Galaxy Survey: Global stellar populations on the size-mass plane
• The inner structure of early-type galaxies in the Illustris simulation
• On the deprojection of axisymmetric bodies
• Systematic trends in total-mass profiles from dynamical models of early-type galaxies
• Early-type galaxy density profiles from IllustrisTNG: I. Galaxy correlations and the impact of baryons
• SDSS--IV MaNGA : The Inner Density Slopes of nearby galaxies
• A study of stellar orbit fractions: simulated IllustrisTNG galaxies compared to CALIFA observations
• Early-type galaxy density profiles from IllustrisTNG: II. Evolutionary trend of the total density profile
• On the Uncertainties of the Central Density in Axisymmetric Galaxies due to Deprojection
• Redshift Evolution of the Fundamental Plane Relation in the IllustrisTNG Simulation

Cited by in corpus (5)

• MaNGA DynPop -- III. Stellar dynamics versus stellar population relations in 6000 early-type and spiral galaxies: Fundamental Plane, mass-to-light ratios, total density slopes, and dark matter fractions
• SDSS-IV MaNGA: Stellar M/L gradients and the M/L-colour relation in galaxies
• The Origin of Massive Compact Galaxies: Lessons from IllustrisTNG
• On the Origin of the Variety of Velocity Dispersion Profiles of Galaxies
• The environment of QSO triplets at 1 $\lesssim$ z $\lesssim$ 1.5