The Quenched Satellite Population Around Milky Way Analogs

Abstract

We study the relative fractions of quenched and star-forming satellite galaxies in the Satellites Around Galactic Analogs (SAGA) survey and Exploration of Local VolumE Satellites (ELVES) program, two nearby and complementary samples of Milky Way-like galaxies that take different approaches to identify faint satellite galaxy populations. We cross-check and validate sample cuts and selection criteria, as well as explore the effects of different star-formation definitions when determining the quenched satellite fraction of Milky Way analogs. We find the mean ELVES quenched fraction ($⟨QF⟩$), derived using a specific star formation rate (sSFR) threshold, decreases from $\sim$50% to $\sim$27% after applying a cut in absolute magnitude to match that of the SAGA survey ($⟨QF{⟩}_{SAGA}\sim$9%). We show these results are consistent for alternative star-formation definitions. Furthermore, these quenched fractions remain virtually unchanged after applying an additional cut in surface brightness. Using a consistently-derived sSFR and absolute magnitude limit for both samples, we show that the quenched fraction and the cumulative number of satellites in the ELVES and SAGA samples broadly agree. We briefly explore radial trends in the ELVES and SAGA samples, finding general agreement in the number of star-forming satellites per host as a function of radius. Despite the broad agreement between the ELVES and SAGA samples, some tension remains with these quenched fractions in comparison to the Local Group and simulations of Milky Way analogs.

arXiv commentAccepted for publication in MNRAS, additional discussion and new figure added. 14 pages, 7 figures, 1 table, 1 appendix with 2 additional figures. Main results in Figure 3-7

References in corpus (70)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• Astropy: A Community Python Package for Astronomy
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• The observed properties of dwarf galaxies in and around the Local Group
• Small-Scale Challenges to the $\Lambda$CDM Paradigm
• Reionization and the abundance of galactic satellites
• A concise reference to (projected) Sersic R^{1/n} quantities, including Concentration, Profile Slopes, Petrosian indices, and Kron Magnitudes
• Reconciling dwarf galaxies with LCDM cosmology: Simulating a realistic population of satellites around a Milky Way-mass galaxy
• Galaxy evolution in groups and clusters: satellite star formation histories and quenching timescales in a hierarchical Universe
• The APOSTLE simulations: solutions to the Local Group's cosmic puzzles
• Comparison of H-alpha and UV Star Formation Rates in the Local Volume: Systematic Discrepancies for Dwarf Galaxies
• The Quenching of the Ultra-Faint Dwarf Galaxies in the Reionization Era
• The SAGA Survey: I. Satellite Galaxy Populations Around Eight Milky Way Analogs
• The extended halo of Centaurus A: uncovering satellites, streams, and substructures
• Quenching and ram pressure stripping of simulated Milky Way satellite galaxies
• The APOSTLE project: Local Group kinematic mass constraints and simulation candidate selection
• Milky Way Satellite Census. II. Galaxy--Halo Connection Constraints Including the Impact of the Large Magellanic Cloud
• The SAGA Survey. II. Building a Statistical Sample of Satellite Systems around Milky Way-like Galaxies
• Confirmation of Faint Dwarf Galaxies in the M81 Group
• Star formation in the nearby universe: the ultraviolet and infrared points of view
• Ultra-faint dwarfs in a Milky Way context: Introducing the Mint Condition DC Justice League Simulations
• The Dearth of Neutral Hydrogen in Galactic Dwarf Spheroidal Galaxies
• Discovery of New Dwarf Galaxies in the M81 Group
• The Gas Content and Stripping of Local Group Dwarf Galaxies
• Connecting the first galaxies with ultra faint dwarfs in the Local Group: chemical signatures of Population~III stars
• Star formation histories of dwarf galaxies in the FIRE simulations: dependence on mass and Local Group environment
• Rapid Environmental Quenching of Satellite Dwarf Galaxies in the Local Group
• The Hestia project: simulations of the Local Group
• The discovery of seven extremely low surface brightness galaxies in the field of the nearby spiral galaxy M101
• Using Jupyter for reproducible scientific workflows
• Shadows in the Dark: Low-Surface-Brightness Galaxies Discovered in the Dark Energy Survey
• The faint end of the Centaurus A satellite luminosity function
• DGSAT: Dwarf Galaxy Survey with Amateur Telescopes I. Discovery of low surface brightness systems around nearby spiral galaxies
• First results from the MADCASH Survey: A Faint Dwarf Galaxy Companion to the Low Mass Spiral Galaxy NGC 2403 at 3.2 Mpc
• Star formation properties in the Local Volume galaxies via $H\alpha$ and FUV fluxes
• A Lonely Giant: The Sparse Satellite Population of M94 Challenges Galaxy Formation
• The ARTEMIS simulations: stellar haloes of Milky Way-mass galaxies
• ELVES I: Structures of Dwarf Satellites of MW-like Galaxies; Morphology, Scaling Relations, and Intrinsic Shapes
• The M101 Satellite Luminosity Function and the Halo to Halo Scatter Among Local Volume Hosts
• Wide-Field Survey of Dwarf Satellite Systems Around 10 Hosts in the Local Volume
• Discovery of diffuse dwarf galaxy candidates around M101
• The Leo-I group: new dwarf galaxy and UDG candidates
• The abundance of satellites around Milky Way- and M31-like galaxies with the TNG50 simulation: a matter of diversity
• Resolved Dwarf Galaxy Searches within ~5 Mpc with the Vera Rubin Observatory and Subaru Hyper Suprime-Cam
• Discovery of a new faint dwarf galaxy associated with NGC 253
• New low surface brightness dwarf galaxies in the Centaurus group
• New dwarf galaxy candidates in the Centaurus group
• Quenching timescales of dwarf satellites around Milky Way-mass hosts
• Antlia B: A faint dwarf galaxy member of the NGC 3109 association
• Extinguishing the FIRE: environmental quenching of satellite galaxies around Milky Way-mass hosts in simulations
• The cumulative star-formation histories of dwarf galaxies with TNG50. I: Environment-driven diversity and connection to quenching
• Tracing the Quenching History in Galaxy Clusters in the EAGLE Simulation
• Can cosmological simulations capture the diverse satellite populations of observed Milky Way analogues?
• Using Surface Brightness Fluctuations to Study Nearby Satellite Galaxy Systems: Calibration and Methodology
• New Low Surface Brightness Dwarf Galaxies Detected Around Nearby Spirals
• Systematically Measuring Ultra-Diffuse Galaxies (SMUDGes). III. The Southern SMUDGes Catalog
• The Satellite Luminosity Function of M101 into the Ultra-Faint Dwarf Galaxy Regime
• Calibrating UV Star Formation Rates for Dwarf Galaxies from STARBIRDS
• Measuring distances to low-luminosity galaxies using surface brightness fluctuations
• Tucana B: A Potentially Isolated and Quenched Ultra-faint Dwarf Galaxy at D$\approx$1.4 Mpc
• Hubble Space Telescope Observations of NGC 253 Dwarf Satellites: Discovery of Three Ultra-faint Dwarf Galaxies
• Satellites Around Milky Way Analogs: Tension in the Number and Fraction of Quiescent Satellites Seen in Observations Versus Simulations
• Satellites of Milky Way- and M31-like galaxies with TNG50: quenched fractions, gas content, and star formation histories
• The Intrinsic Shapes of Low Surface Brightness Galaxies: a Discriminant of LSBG Formation Mechanisms
• Using Surface Brightness Fluctuations to Study Nearby Satellite Galaxy Systems: the Complete Satellite System of M101
• ELVES III: Environmental Quenching by Milky Way-Mass Hosts
• Ultrafaint Dwarf Galaxy Candidates in the M81 Group: Signatures of Group Accretion
• Neutral Hydrogen Observations of Low Surface Brightness Galaxies around M101 and NGC 5485
• HI Properties of Satellite Galaxies around Local Volume Hosts

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• The SAGA Survey. III. A Census of 101 Satellite Systems around Milky Way-mass Galaxies
• The SAGA Survey. IV. The Star Formation Properties of 101 Satellite Systems around Milky Way-mass Galaxies
• Beyond Ultra-diffuse Galaxies. II. Environmental Quenching of Mass-Size Outliers among the Satellites of Milky Way Analogs
• Environmental Quenching of Low Surface Brightness Galaxies near Milky Way mass Hosts
• Bulgeless Evolution And the Rise of Discs (BEARD) III. A numerical simulation view of satellites around Milky-Way analogues