MUSE observations of dwarf galaxies and a stellar stream in the M83 group

Abstract

Spectroscopy for faint dwarf galaxies outside of our own Local Group is challenging. Here, we present MUSE spectroscopy to study the properties of four known dwarf satellites and one stellar stream (KK208) surrounding the nearby grand spiral M83, which resides together with the lenticular galaxy Cen A in the Centaurus group. This data complete the phase-space information for all known dwarf galaxies around M83 down to a completeness of $-$10 mag in the $V$ band. All studied objects have an intermediate to old and metal-poor stellar population and follow the stellar luminosity-metallicity relation as defined by the Local Group dwarfs. For the stellar stream we serendipitously identify a previously unknown globular cluster, which is old and metal-poor. Two dwarf galaxies (NGC5264 and dw1341-29) may be a bound satellite of a satellite system due to their proximity and shared velocities. Having access to the positions and velocities of 13 dwarfs around M83, we estimate the mass of the group with different estimators. Ranging between 1.3 and $3.0\times 10^{12}$ M${}_{\odot }$ for the halo mass we find it to be larger than previously assumed. This may impact the previously reported tension for cold dark matter cosmology with the count of dwarf galaxies. In contrast to Cen A, we do not find a co-rotating plane-of-satellites around M83.

Accepted for publication in A&A, 10 pages, 7 figures, 2 tables

References in corpus (39)

• Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
• The MUSE second-generation VLT instrument
• Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
• Updated Nearby Galaxy Catalog
• UV-extended E-MILES stellar population models: young components in massive early-type galaxies
• A Vast Thin Plane of Co-rotating Dwarf Galaxies Orbiting the Andromeda Galaxy
• The Data Processing Pipeline for the MUSE Instrument
• FIGGS: Faint Irregular Galaxies GMRT Survey - Overview, observations and first results
• The Hubble flow around the CenA / M83 galaxy complex
• PHANGS-ALMA Data Processing and Pipeline
• The orbital poles of Milky Way satellite galaxies: a rotationally supported disc-of-satellites
• Two Planes of Satellites in the Centaurus A Group
• Using The Baryonic Tully-Fisher Relation to Measure $H_o$
• Globular Cluster Systems in Nearby Dwarf Galaxies: I. HST/ACS Observations and Dynamical Properties of Globular Clusters at Low Environmental Density
• The Extragalactic Distance Database: The Color-Magnitude Diagrams and Tip of the Red Giant Branch Distances Catalog
• The ultra-diffuse galaxy NGC 1052-DF2 with MUSE: II. The population of DF2: stars, clusters and planetary nebulae
• Discovery of a close pair of faint dwarf galaxies in the halo of Centaurus A
• Structure and morphology of the MATLAS dwarf galaxies and their central nuclei
• The coherent motion of Cen A dwarf satellite galaxies remains a challenge for $\Lambda$CDM cosmology
• A spectroscopic study of MATLAS-2019 with MUSE: an ultra-diffuse galaxy with an excess of old globular clusters
• 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
• Predicted MOND velocity dispersions for a catalog of ultra-diffuse galaxies in group environments
• Nuclear star cluster formation in star-forming dwarf galaxies
• Mapping Dark Matter with Extragalactic Stellar Streams: the Case of Centaurus A
• Inspecting the Cepheid distance ladder: The Hubble Space Telescope distance to the SNIa host galaxy NGC 5584
• The properties of dwarf spheroidal galaxies in the Cen A group: Stellar populations, internal dynamics, and a heart-shaped Halpha ring
• Radial velocities and stellar population properties of 56 MATLAS dwarf galaxies observed with MUSE
• The phantom dark matter halos of the Local Volume in the context of modified Newtonian dynamics
• Modified Virial Formulae and the Theory of Mass Estimators
• Star formation history and evolution of gas-rich dwarf galaxies in the Centaurus A group
• A too-many dwarf satellite galaxies problem in the MATLAS low-to-moderate density fields
• Classifying the satellite plane membership of Centaurus A's dwarf galaxies using orbital alignment constraints
• A too-many dwarf galaxy satellites problem in the M83 group
• New Velocity Measurements of NGC 5128 Globular Clusters out to 130 kpc: Outer Halo Kinematics, Substructure and Dynamics
• Investigating the Dark Matter Halo of NGC 5128 using a Discrete Dynamical Model
• Is there a dwarf galaxy satellite-of-satellite problem in $\Lambda$CDM?
• Dwarf Galaxies in the MATLAS Survey: The satellite system of NGC474 under scrutiny with MUSE
• A New View of Observed Galaxies through 3D Modelling and Visualisation

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