SDSS-IV MaNGA: Stellar M/L gradients and the M/L-colour relation in galaxies

Abstract

The stellar mass-to-light ratio gradient in SDSS $r-$band $\nabla (M_{\ast }/L_r)$ of a galaxy depends on its mass assembly history, which is imprinted in its morphology and gradients of age, metallicity, and stellar initial mass function (IMF). Taking a MaNGA sample of 2051 galaxies with stellar masses ranging from $10^9$ to $10^{12}{M}_{\odot }$ released in SDSS DR15, we focus on face-on galaxies, without merger and bar signatures, and investigate the dependence of the 2D $\nabla (M_{\ast }/L_r)$ on other galaxy properties, including $M_{\ast }/L_r$-colour relationships by assuming a fixed Salpeter IMF as the mass normalization reference. The median gradient is $\nabla M_{\ast }/L_r\sim -0.1$ (i.e., the $M_{\ast }/L_r$ is larger at the centre) for massive galaxies, becomes flat around $M_{\ast }\sim 10^{10}{M}_{\odot }$ and change sign to $\nabla M_{\ast }/L_r\sim 0.1$ at the lowest masses. The $M_{\ast }/L_r$ inside a half light radius increases with increasing galaxy stellar mass; in each mass bin, early-type galaxies have the highest value, while pure-disk late-type galaxies have the smallest. Correlation analyses suggest that the mass-weighted stellar age is the dominant parameter influencing the $M_{\ast }/L_r$ profile, since a luminosity-weighted age is easily affected by star formation when the specific star formation rate (sSFR) inside the half light radius is higher than $10^{-3}{\mathrm{Gyr}}^{-1}$. With increased sSFR gradient, one can obtain a steeper negative $\nabla (M_{\ast }/L_r)$. The scatter in the slopes of $M_{\ast }/L$-colour relations increases with increasing sSFR, for example, the slope for post-starburst galaxies can be flattened to $0.45$ from the global value $0.87$ in the $M_{\ast }/L$ vs. $g-r$ diagram. Hence converting galaxy colours to $M_{\ast }/L$ should be done carefully, especially for those galaxies with young luminosity-weighted stellar ages, which can have quite different star formation histories.

arXiv comment12 pages, 10 figures. Accepted for publication in MNRAS

References in corpus (88)

• Array Programming with NumPy
• Galactic Stellar and Substellar Initial Mass Function
• On the variation of the Initial Mass Function
• Star Formation in Galaxies Along the Hubble Sequence
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• The Optical and Near-Infrared Properties of Galaxies: I. Luminosity and Stellar Mass Functions
• Parametric Recovery of Line-of-Sight Velocity Distributions from Absorption-Line Spectra of Galaxies via Penalized Likelihood
• Stellar mass-to-light ratios and the Tully-Fisher relation
• A Simple Model for the Absorption of Starlight by Dust in Galaxies
• Overview of the SDSS-IV MaNGA Survey: Mapping Nearby Galaxies at Apache Point Observatory
• A large stellar evolution database for population synthesis studies. I. Scaled solar models and isochrones
• Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
• Adaptive spatial binning of integral-field spectroscopic data using Voronoi tessellations
• CALIFA, the Calar Alto Legacy Integral Field Area survey: I. Survey presentation
• The SAURON project - IV. The mass-to-light ratio, the virial mass estimator and the fundamental plane of elliptical and lenticular galaxies
• The Multi-Object, Fiber-Fed Spectrographs for SDSS and the Baryon Oscillation Spectroscopic Survey
• Modeling the Panchromatic Spectral Energy Distributions of Galaxies
• Evolutionary Stellar Population Synthesis with MILES. Part I: The Base Models and a New Line Index System
• The Two Phases of Galaxy Formation
• 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
• A comprehensive classification of galaxies in the SDSS: How to tell true from fake AGN?
• A systematic variation of the stellar initial mass function in early-type galaxies
• The Relation Between Compact, Quiescent High Redshift Galaxies and Massive Nearby Elliptical Galaxies: Evidence for Hierarchical, Inside-Out Growth
• Measuring the inclination and mass-to-light ratio of axisymmetric galaxies via anisotropic Jeans models of stellar kinematics
• Efficient Multi-Gaussian Expansion of galaxies
• A Substantial Population of Low Mass Stars in Luminous Elliptical Galaxies
• Structure and Kinematics of Early-Type Galaxies from Integral-Field Spectroscopy
• The stellar mass assembly of galaxies in the Illustris simulation: growth by mergers and the spatial distribution of accreted stars
• The cosmological size and velocity dispersion evolution of massive early-type galaxies
• Improving galaxy morphologies for SDSS with Deep Learning
• SDSS-IV MaNGA IFS Galaxy Survey --- Survey Design, Execution, and Initial Data Quality
• The Fifteenth Data Release of the Sloan Digital Sky Surveys: First Release of MaNGA Derived Quantities, Data Visualization Tools and Stellar Library
• The SAURON project - XVII. Stellar population analysis of the absorption line strength maps of 48 early-type galaxies
• Can retired galaxies mimic active galaxies? Clues from the Sloan Digital Sky Survey
• The CALIFA survey across the Hubble sequence: Spatially resolved stellar population properties in galaxies
• Reconstructing the Subsurface Three-Dimensional Magnetic Structure of A Solar Active Region Using SDO/HMI Observations
• Spatially resolved spectroscopy of Coma cluster early -- type galaxies: III. The stellar population gradients
• Compact High-Redshift Galaxies Are the Cores of the Most Massive Present-Day Spheroids
• Discriminating Between the Physical Processes that Drive Spheroid Size Evolution
• Dark Matter Contraction and the Stellar Content of Massive Early-type Galaxies: Disfavoring "Light" Initial Mass Functions
• Systematic variation of the stellar Initial Mass Function with velocity dispersion in early-type galaxies
• The counterrotating core and the black hole mass of IC1459
• Made-to-measure N-body systems
• SDSS-IV MaNGA: Spatially resolved star formation histories in galaxies as a function of galaxy mass and type
• Firefly (Fitting IteRativEly For Likelihood analYsis): a full spectral fitting code
• The stellar IMF determined in early-type galaxies from a non-degenerate set of optical line indices
• Dynamical masses of early-type galaxies: a comparison to lensing results and implications for the stellar IMF and the distribution of dark matter
• Age and metallicity gradients in early-type galaxies: A dwarf to giant sequence
• A Large Stellar Evolution Database for Population Synthesis Studies. III. Inclusion of the full Asymptotic Giant Branch phase and Web tools for stellar population analyses
• SDSS-IV MaNGA: environmental dependence of stellar age and metallicity gradients in nearby galaxies
• SDSS-IV MaNGA: Global stellar population and gradients for about 2000 early-type and spiral galaxies on the mass-size plane
• SDSS-IV MaNGA: The Spatially Resolved Stellar Initial Mass Function in $\sim$400 Early-Type Galaxies
• The mass-metallicity gradient relation of early-type galaxies
• The stellar mass structure of massive galaxies from z=0 to z=2.5; surface density profiles and half-mass radii
• From Starburst to Quiescence: Testing AGN feedback in Rapidly Quenching Post-Starburst Galaxies
• Stellar mass-to-light ratios from galaxy spectra: how accurate can they be?
• Small scatter and nearly-isothermal mass profiles to four half-light radii from two-dimensional stellar dynamics of early-type galaxies
• SDSS-IV MaNGA PyMorph Photometric and Deep Learning Morphological Catalogs and implications for bulge properties and stellar angular momentum
• Timing the formation and assembly of early-type galaxies via spatially resolved stellar populations analysis
• P-MaNGA: Full spectral fitting and stellar population maps from prototype observations
• SDSS-IV MaNGA: variation of the stellar initial mass function in spiral and early-type galaxies
• MUSE observations of M87: radial gradients for the stellar initial-mass function and the abundance of Sodium
• The importance of dry and wet merging on the formation and evolution of elliptical galaxies
• The origins of post-starburst galaxies at z<0.05
• Dominant dark matter and a counter rotating disc: MUSE view of the low luminosity S0 galaxy NGC 5102
• Insights into formation scenarios of massive Early-Type galaxies from spatially resolved stellar population analysis in CALIFA
• The Stellar Initial Mass Function in Early-Type Galaxies From Absorption Line Spectroscopy. IV. A Super-Salpeter IMF in the center of NGC 1407 from Non-Parametric Models
• Systematic trends in total-mass profiles from dynamical models of early-type galaxies
• Recovering stellar population parameters via two full-spectrum fitting algorithms in the absence of model uncertainties
• Evidence for radial variations in the stellar mass-to-light ratio of massive galaxies from weak and strong lensing
• Stellar mass-to-light ratio gradients in galaxies: correlations with mass
• Six new supermassive black hole mass determinations from adaptive-optics assisted SINFONI observations
• Spatially resolved mass-to-light from the CALIFA survey. Mass-to-light ratio vs. color relations
• Galaxy properties as revealed by MaNGA. I. Constraints on Initial Mass Function and M${}_{\ast }$/L gradients in ellipticals
• SDSS-IV MaNGA: Stellar initial mass function variation inferred from Bayesian analysis of the integral field spectroscopy of early type galaxies
• The stellar population and initial mass function of NGC 1399 with MUSE
• Kinetys II: Constraints on spatial variations of the stellar initial mass function from K-band spectroscopy
• Radial gradients in initial mass function sensitive absorption features in the Coma brightest cluster galaxies
• Recovering stellar population parameters via different population models and stellar libraries
• Radial measurements of IMF-sensitive absorption features in two massive ETGs
• Made-to-measure galaxy models - II Elliptical and Lenticular Galaxies
• A low upper mass limit for the central black hole in the late-type galaxy NGC 4414
• The Effect of Spatial Gradients in Stellar Mass-to-Light Ratio on Black Hole Mass Measurements
• Estimating dust attenuation from galactic spectra. I. methodology and tests
• Estimating dust attenuation from galactic spectra. II. Stellar and gas attenuation in star-forming and diffuse ionized gas regions in MaNGA
• A discrete chemo-dynamical model of M87's globular clusters: Kinematics extending to ~ 400 kpc
• Modelling the formation of today's massive ellipticals
• 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 ${\sigma }_{\mathrm{e}}$

Cited by in corpus (19)

• Modelling simple stellar populations in the near-ultraviolet to near-infrared with the X-shooter Spectral Library (XSL)
• Stellar Mass-to-light Ratios: Composite Bulge+Disk Models and the Baryonic Tully-Fisher Relation
• Testing strong lensing subhalo detection with a cosmological simulation
• The Size-Mass relation at Rest-Frame $1.5\mu$m from JWST/NIRCam in the COSMOS-WEB and PRIMER-COSMOS fields
• 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: Integral-field kinematics and stellar population of a sample of galaxies with counter-rotating stellar disks selected from about 4000 galaxies
• The half mass radius of MaNGA galaxies: Effect of IMF gradients
• Quantifying the stellar ages of dynamically separated bulges and disks of CALIFA spiral galaxies
• The evolution of radial gradients of MaNGA quiescent elliptical galaxies: inside-out quenching or outer mass growth?
• MaNGA 8313-1901: gas accretion observed in a blue compact dwarf galaxy?
• SDSS-IV MaNGA: The MaNGA Dwarf Galaxy Sample
• Flexible Models for Galaxy Star Formation Histories Both Shift and Scramble the Optical Color-M/L Relationship
• Galaxy stellar and total mass estimation using machine learning
• Stellar population analysis of MaNGA early-type galaxies: IMF dependence and systematic effects
• The extended Planetary Nebula Spectrograph (ePN.S) early-type galaxy survey: The specific angular momentum of ETGs
• Photometric properties of classical bulge and pseudo-bulge galaxies at $0.5\le z<1.0$
• Improved SED-Fitting Assumptions Result in Inside-Out Quenching at $z\sim 0.5$ and Quenching at All Radii Simultaneously at $z\sim 1$
• A novel approach for calculating galaxy rotation curves using spaxel cross-correlation and iterative smoothing
• WISDOM Project -- XXVI. Cross-checking supermassive black hole mass estimates from ALMA CO gas kinematics and SINFONI stellar kinematics in the galaxy NGC 4751