Radial velocities and stellar population properties of 56 MATLAS dwarf galaxies observed with MUSE

Abstract

Dwarf galaxies have been extensively studied in the Local Group, in nearby groups, and selected clusters, giving us a robust picture of their global stellar and dynamical properties in particular locations in the Universe. Intense study of these properties has revealed correlations between them, including the well known universal stellar mass-metallicity relation. However, since dwarfs play a role in a vast range of different environments, much can be learned about galaxy formation and evolution through extending the study of these objects to various locations. We present MUSE spectroscopy of a sample of 56 dwarf galaxies as a follow-up to the MATLAS survey in low-to-moderate density environments beyond the Local Volume. The dwarfs have stellar masses in the range of $M_{\ast }/M_{\odot }$ = 10${}^{6.1}$-10${}^{9.4}$ and show a distance range of D = 14-148 Mpc, the majority (75%) of which are located in the range targeted by the MATLAS survey (10-45 Mpc). We thus report a 75% (79% for dwarf ellipticals) success rate for the semi-automatic identification of dwarf galaxies in the MATLAS survey on the here presented subsample. Using pPXF full spectrum fitting, we determine their line-of-sight velocity and can match the majority of them with their massive host galaxy. Close inspection of their spectra reveals that ~30% show clear emission lines and thus star formation activity. We estimate their stellar population properties (age and metallicity) and compare our results with other works investigating Local Volume and cluster dwarf galaxies. We find that the dwarf galaxies presented in this work show a systematic offset from the stellar mass-metallicity relation towards lower metallicities at the same stellar mass. A similar deviation is present in other works in the stellar mass range probed in this work and might be attributed to the use of different methodologies for deriving the metallicity.

19 pages, 15 figures, 1 table. Accepted for publication in Astronomy & Astrophysics, Abstract shortened due to arxiv abstract length requirements

References in corpus (61)

• Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
• Strangulation as the primary mechanism for shutting down star formation in galaxies
• Measurements of the Hubble Constant: Tensions in Perspective
• UV-extended E-MILES stellar population models: young components in massive early-type galaxies
• The Stellar, Gas and Dynamical Masses of Star-Forming Galaxies at z~2
• A Vast Thin Plane of Co-rotating Dwarf Galaxies Orbiting the Andromeda Galaxy
• The Haunted Halos of Andromeda and Triangulum: A panorama of galaxy formation in action
• Dark matter and cosmic structure
• 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
• The Atlas3D project -- XXIX. The new look of early-type galaxies and surrounding fields disclosed by extremely deep optical images
• The Luminosity Function of the Milky Way Satellites
• The Origin and Evolution of the Mass-Metallicity Relationship for Galaxies: Results from Cosmological N-Body Simulations
• Scaling Relations of Spiral Galaxies
• Stellar populations of early-type galaxies in different environments II. Ages and metallicities
• Discovery and analysis of three faint dwarf galaxies and a globular cluster in the outer halo of the Andromeda galaxy
• The SAGA Survey. II. Building a Statistical Sample of Satellite Systems around Milky Way-like Galaxies
• The Cosmic Evolution of Metallicity from the SDSS Fossil Record
• A Possible Origin of the Mass-Metallicity Relation of Galaxies
• The PAndAS view of the Andromeda satellite system - II. Detailed properties of 23 M31 dwarf spheroidal galaxies
• Insights on the stellar mass-metallicity relation from the CALIFA survey
• The DECam Local Volume Exploration Survey: Overview and First Data Release
• Shadows in the Dark: Low-Surface-Brightness Galaxies Discovered in the Dark Energy Survey
• Quantifying scatter in galaxy formation at the lowest masses
• The ultra-diffuse galaxy NGC 1052-DF2 with MUSE: II. The population of DF2: stars, clusters and planetary nebulae
• The Dragonfly Nearby Galaxies Survey. III. The Luminosity Function of the M101 Group
• The Fornax Deep Survey (FDS) with VST. VI. Optical properties of the dwarf galaxies in the Fornax cluster
• Discovery of diffuse dwarf galaxy candidates around M101
• Census and classification of low-surface-brightness structures in nearby early-type galaxies from the MATLAS survey
• NGC5846-UDG1: A galaxy formed mostly by star formation in massive, extremely dense clumps of gas
• Structure and morphology of the MATLAS dwarf galaxies and their central nuclei
• Ultra diffuse galaxies in the MATLAS low-to-moderate density fields
• The coherent motion of Cen A dwarf satellite galaxies remains a challenge for $\Lambda$CDM cosmology
• Diversity of nuclear star cluster formation mechanisms revealed by their star formation histories
• The Fornax Deep Survey (FDS) with the VST XI. The search for signs of preprocessing between the Fornax main cluster and Fornax A group
• A spectroscopic study of MATLAS-2019 with MUSE: an ultra-diffuse galaxy with an excess of old globular clusters
• Dwarf galaxies in the MATLAS survey: Hubble Space Telescope observations of the globular cluster system in the ultra-diffuse galaxy MATLAS-2019
• Metal-poor nuclear star clusters in two dwarf galaxies near Centaurus A suggesting formation from the in-spiraling of globular clusters
• Testing the two planes of satellites in the Centaurus Group
• Chemical Properties of Star Forming Dwarf Galaxies
• Dwarf Galaxy Discoveries from the KMTNet Supernova Program I. The NGC 2784 Galaxy Group
• The Effect of Ram-Pressure Stripping on Dwarf Galaxies
• The SDSS-UKIDSS Fundamental Plane of Early-type Galaxies
• The Satellite Luminosity Function of M101 into the Ultra-Faint Dwarf Galaxy Regime
• The LBT Satellites of Nearby Galaxies Survey (LBT-SONG): The Satellite Population of NGC 628
• Hubble Space Telescope Observations of NGC 253 Dwarf Satellites: Discovery of Three Ultra-faint Dwarf Galaxies
• The quiescent fraction of isolated low surface brightness galaxies: Observational constraints
• Environment and the cosmic evolution of star formation
• The hELENa project - I. Stellar populations of early-type galaxies linked with local environment and galaxy mass
• Nuclear star cluster formation in star-forming dwarf galaxies
• Using Surface Brightness Fluctuations to Study Nearby Satellite Galaxy Systems: the Complete Satellite System of M101
• Flattened structures of dwarf satellites around massive host galaxies in the MATLAS low-to-moderate density fields
• The properties of dwarf spheroidal galaxies in the Cen A group: Stellar populations, internal dynamics, and a heart-shaped Halpha ring
• The abundance of dwarf galaxies around low-mass giants in the Local Volume
• Galaxy populations in the Hydra I cluster from the VEGAS survey I. Optical properties of a large sample of dwarf galaxies
• A metal-poor ultra compact dwarf galaxy at a kiloparsec distance from the low-mass elliptical galaxy FCC47
• HI observations of the MATLAS dwarf and ultra-diffuse galaxies
• Recovering age-metallicity distributions from integrated spectra: validation with MUSE data of a nearby nuclear star cluster
• Early-Type Galaxy Star Formation Histories in Different Environments
• Probing baryonic processes and gastrophysics in the formation of the Milky Way dwarf satellites: I. metallicity distribution properties
• Is the stellar mass-stellar metallicity relation universal in the Milky Way satellites and beyond?
• The Origin of the Stellar Mass-Stellar Metallicity Relation in the Milky Way Satellites and beyond

Cited by in corpus (12)

• The SAGA Survey. III. A Census of 101 Satellite Systems around Milky Way-mass Galaxies
• An almost dark galaxy with the mass of the Small Magellanic Cloud
• Looking into the faintEst WIth MUSE (LEWIS): on the nature of ultra-diffuse galaxies in the Hydra-I cluster.I. Project description and preliminary results
• A too-many dwarf satellite galaxies problem in the MATLAS low-to-moderate density fields
• VEGAS-SSS: Tracing Globular Cluster Populations in the Interacting NGC3640 Galaxy Group
• Lopsided distribution of MATLAS and ELVES dwarf satellite systems around isolated host galaxies
• Dwarf Galaxies in the MATLAS Survey: The satellite system of NGC474 under scrutiny with MUSE
• MUSE observations of dwarf galaxies and a stellar stream in the M83 group
• Dwarf galaxies in the MATLAS Survey: Hubble Space Telescope observations of nuclear star clusters
• IFUM Integrated Field Spectroscopy of Ten M104 Satellite Galaxy Candidates
• Looking into the faintEst WIth MUSE (LEWIS): on the nature of ultra-diffuse galaxies in the Hydra I cluster. V. Integrated stellar population properties
• Radial velocities and stellar populations for a sample of MATLAS survey dwarfs