Is the stellar mass-stellar metallicity relation universal in the Milky Way satellites and beyond?

Abstract

Observations reveal a universal stellar mass-stellar metallicity relation (MZR) existing in Local Group dwarfs of different types, $Z_{\ast }\propto M_{\ast }^{\alpha }$ with $\alpha =0.30\pm 0.02$. In this work, we investigate the "universality" of the MZRs for both satellites and central galaxies in a large number of different host dark matter halos covering a large mass range of $10^9$-$10^{15}{h}^{-1}{M}_{\odot }$, by using a semianalytical galaxy formation and evolution model. We obtain the following results. (1) The exponents ($\alpha$) for the MZRs of the satellites in halos with the same mass as the Milky Way halo but different individual assembly histories are mostly $\sim$0.2-0.4, i.e., having a scatter of $\sim 0.2$; and the scatter of $\alpha$ increases with decreasing halo masses. (2) The MZR relations are changed little by the variation of halo masses and the classification between central galaxies and satellites, if many halos with the same mass are stacked together. (3) A double power law exists in the MZR relations for both central galaxies and stacked satellites, with $\alpha \sim$0.2-0.4 at $10^3{M}_{\odot }<M_{\ast }<10^8{M}_{\odot }$ and a relatively higher $\alpha \sim 0.5$ at $10^8{M}_{\odot }<M_{\ast }<10^{11}{M}_{\odot }$. (4) The high-mass satellites ($M_{\ast }>10^8{M}_{\odot }$) existing mostly in high-mass halos can lead to an apparent increase of $\alpha$ (from $\sim 0.2$ to $\sim 0.4$) with increasing host halo masses shown in the single power law fitting results of stacked satellites. The universality of the MZR suggests the common physical processes in stellar formation and chemical evolution of galaxies can be unified over a large range of galaxy masses and halo masses.

arXiv comment13 pages, 4 figures, accepted for publication in the Astrophysical Journal

References in corpus (54)

• The many lives of active galactic nuclei: cooling flows, black holes and the luminosities and colours of galaxies
• The Origin of the Mass--Metallicity Relation: Insights from 53,000 Star-Forming Galaxies in the SDSS
• The broken hierarchy of galaxy formation
• Hierarchical Galaxy Formation
• The Aquarius Project: the subhalos of galactic halos
• Physical Models of Galaxy Formation in a Cosmological Framework
• Nucleosynthesis in Chandrasekhar Mass Models for Type Ia Supernovae and Constraints on Progenitor Systems and Burning-Front Propagation
• The ages and metallicities of galaxies in the local universe
• From dwarf spheroidals to cDs: Simulating the galaxy population in a LCDM cosmology
• A Semi-Analytic Model for the Co-evolution of Galaxies, Black Holes, and Active Galactic Nuclei
• A fundamental relation between mass, SFR and metallicity in local and high redshift galaxies
• Semi-Analytic Modelling of Galaxy Formation: The Local Universe
• What Shapes the Luminosity Function of Galaxies?
• Gas-regulation of galaxies: the evolution of the cosmic sSFR, the metallicity-mass-SFR relation and the stellar content of haloes
• The Universal Stellar Mass-Stellar Metallicity Relation for Dwarf Galaxies
• Mass models of the Milky Way
• Nucleosynthesis Yields of Core-Collapse Supernovae and Hypernovae, and Galactic Chemical Evolution
• Effect of Reionization on the Structure Formation in the Universe
• The tumultuous lives of galactic dwarfs and the missing satellites problem
• Massloss of galaxies due to a UV-background
• Improved Estimates of the Milky Way's Stellar Mass and Star Formation Rate from Hierarchical Bayesian Meta-Analysis
• The Origin of the Galaxy Mass-Metallicity Relation and Implications for Galactic Outflows
• Dark matter substructure and gamma-ray annihilation in the Milky Way halo
• The Origin and Evolution of the Galaxy Mass-Metallicity Relation
• On Extending the Mass-Metallicity Relation of Galaxies by 2.5 Decades in Stellar Mass
• Ages and metallicities of early-type galaxies in the SDSS: new insight into the physical origin of the colour-magnitude and the Mg2-sigmaV relations
• How to Plant a Merger Tree
• Galaxy Formation Theory
• Clues to the Origin of the Mass-Metallicity Relation: Dependence on Star Formation Rate and Galaxy Size
• Generating Dark Matter Halo Merger Trees
• The Origin and Evolution of the Mass-Metallicity Relationship for Galaxies: Results from Cosmological N-Body Simulations
• The Metallicity of Galaxy Disks: Infall versus Outflow
• Mass and shape of the Milky Way's dark matter halo with globular clusters from Gaia and Hubble
• On the Shoulders of Giants: Properties of the Stellar Halo and the Milky Way Mass Distribution
• Star Formation in Semi-Analytic Galaxy Formation Models with Multiphase Gas
• The Space Motion of Leo I: The Mass of the Milky Way's Dark Matter Halo
• The Cosmic Evolution of Metallicity from the SDSS Fossil Record
• A Possible Origin of the Mass-Metallicity Relation of Galaxies
• The mass of the Milky Way from satellite dynamics
• Evidence for an Intermediate-Mass Milky Way from Gaia DR2 Halo Globular Cluster Motions
• Insights on the stellar mass-metallicity relation from the CALIFA survey
• The population of Milky Way satellites in the LambdaCDM cosmology
• Infall Times for Milky Way Satellites From Their Present-Day Kinematics
• Modelling Element Abundances in Semi-analytic Models of Galaxy Formation
• A Comparison between Semi-Analytic Model Predictions for the CANDELS Survey
• On the nature of the Milky Way satellites
• The satellites of the Milky Way - Insights from semi-analytic modelling in a LambdaCDM cosmology
• Separate ways: The Mass-Metallicity Relation does not strongly correlate with Star Formation Rate in SDSS-IV MaNGA galaxies
• The Need for Speed: Escape velocity and dynamical mass measurements of the Andromeda galaxy
• Beyond Jcrit: a critical curve for suppression of H2-cooling in protogalaxies
• The mass of the Milky Way and M31 using the method of least action
• The importance of preventive feedback: inference from observations of the stellar masses and metallicities of Milky Way dwarf galaxies
• Gas Accretion and Galactic Chemical Evolution: Theory and Observations
• Probing baryonic processes and gastrophysics in the formation of the Milky Way dwarf satellites: I. metallicity distribution properties

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