GAMA 526784: the progenitor of a globular cluster-rich ultra-diffuse galaxy? I. Star clusters, stellar body and ionised gas properties

Abstract

Context. Ultra-diffuse galaxies (UDGs) are an intriguing population of galaxies. Despite their dwarf-like stellar masses and low surface brightness, they have large half-light radii and exhibit a diverse range of globular cluster (GC) populations. Some UDGs host many GCs while others have none, raising questions about the conditions under which star clusters (SC) form in dwarfs. GAMA526784, an isolated UDG with both an old stellar body and an extended star-forming (SF) front, including many young SCs, provides an exceptional case to explore the link between UDG evolution and star cluster formation. Aims. This study investigates the stellar populations, SCs, ionised gas, and kinematics of GAMA526784, focusing on its potential to form massive GCs and its connection to broader UDG formation scenarios. Methods. Imaging from HST and Subaru/HSC, alongside MUSE spectroscopy, were used to analyse the galaxy's morphology, chemical composition, and kinematics. A combination of SED fitting and full spectral fitting was applied. Results. GAMA526784's central stellar body exhibits a low-metallicity ([M/H] ~ -1.0 dex) and an old age (~9.9 Gyr). The outskirts are much younger (~0.9 Gyr), but slightly more metal-poor ([M/H] ~ -1.2 dex). The stellar kinematics show low velocity dispersions (~10 km/s) and a coherent rotational field, while the ionised gas exhibits higher dispersions (~50 km/s), a misaligned rotation axis (~20 deg) and localised SF, what could be suggestive of a recent interaction. The young SCs span ages of 8-11 Myr and masses of log(M*/Mo)~5.0, while the old GCs have ~9 Gyr and stellar masses of log(M*/Mo)~5.5. Conclusions. GAMA526784's properties point to interactions that triggered localised SF, leading to the formation of young SCs. Future observations of its molecular and neutral gas will help assess its environment, and the trigger of this SF episode.

arXiv commentAccepted for publication in A&A. 12 pages, 10 figures, 2 appendices

References in corpus (78)

• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• Correcting for the Effects of Interstellar Extinction
• Parametric Recovery of Line-of-Sight Velocity Distributions from Absorption-Line Spectra of Galaxies via Penalized Likelihood
• The propagation of uncertainties in stellar population synthesis modeling I: The relevance of uncertain aspects of stellar evolution and the IMF to the derived physical properties of galaxies
• Evolution of asymptotic giant branch stars II. Optical to far-infrared isochrones with improved TP-AGB models
• Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
• Adaptive spatial binning of integral-field spectroscopic data using Voronoi tessellations
• The propagation of uncertainties in stellar population synthesis modeling III: model calibration, comparison, and evaluation
• Galaxy and Mass Assembly (GAMA): survey diagnostics and core data release
• The Hyper Suprime-Cam SSP Survey: Overview and Survey Design
• The Star-formation Mass Sequence out to z=2.5
• Inferring the star-formation histories of massive quiescent galaxies with BAGPIPES: Evidence for multiple quenching mechanisms
• Automated data reduction workflows for astronomy
• The O3N2 and N2 abundance indicators revisited: improved calibrations based on CALIFA and Te-based literature data
• Kinemetry: a generalisation of photometry to the higher moments of the line-of-sight velocity distribution
• Forty-Seven Milky Way-Sized, Extremely Diffuse Galaxies in the Coma Cluster
• A galaxy lacking dark matter
• The ACS Virgo Cluster Survey IX: The Color Distributions of Globular Cluster Systems in Early-Type Galaxies
• Evolution of asymptotic giant branch stars I. Updated synthetic TP-AGB models and their basic calibration
• Evolutionary stellar population synthesis with MILES - II. Scaled-solar and α-enhanced models
• The Data Analysis Pipeline for the SDSS-IV MaNGA IFU Galaxy Survey: Overview
• The MUSE Hubble Ultra Deep Field Survey: I. Survey description, data reduction and source detection
• ZAP -- Enhanced PCA Sky Subtraction for Integral Field Spectroscopy
• A Catalog of Globular Cluster Systems: What Determines the Size of a Galaxy's Globular Cluster Population?
• NIHAO XI: Formation of Ultra-Diffuse Galaxies by outflows
• Ultra-diffuse galaxies: the high-spin tail of the abundant dwarf galaxy population
• The propagation of uncertainties in stellar population synthesis modeling II: The challenge of comparing galaxy evolution models to observations
• The Data Analysis Pipeline for the SDSS-IV MaNGA IFU Galaxy Survey: Emission-Line Modeling
• Chemical Evolution of the Magellanic Clouds: analytical models
• MegaMorph - multi-wavelength measurement of galaxy structure: complete Sérsic profile information from modern surveys
• (Almost) Dark Galaxies in the ALFALFA Survey: Isolated HI Bearing Ultra Diffuse Galaxies
• A second galaxy missing dark matter in the NGC1052 group
• Ultra diffuse galaxies outside clusters: clues to their formation and evolution
• Implications for the formation of star clusters from extra-galactic star-formation rates
• An overmassive Dark Halo around an Ultra-diffuse Galaxy in the Virgo Cluster
• Illuminating Low-Surface-Brightness Galaxies with the Hyper Suprime-Cam Survey
• Globular cluster formation in the context of galaxy formation and evolution
• Still Missing Dark Matter: KCWI High-Resolution Stellar Kinematics of NGC1052-DF2
• Off the baryonic Tully-Fisher relation: a population of baryon-dominated ultra-diffuse galaxies
• Formation of ultra-diffuse galaxies in the field and in galaxy groups
• Compact Star Clusters in Nearby Dwarf Irregular Galaxies
• A Universe of Ultra-Diffuse Galaxies: Theoretical Predictions from $\Lambda$CDM Simulations
• The Formation of Ultra-Diffuse Galaxies in Clusters
• MegaMorph -- multi-wavelength measurement of galaxy structure: Sérsic profile fits to galaxies near and far
• The ultra-diffuse galaxy NGC 1052-DF2 with MUSE: I. Kinematics of the stellar body
• Chemical composition and constraints on mass loss for globular clusters in dwarf galaxies: WLM and IKN
• The nearest ultra diffuse galaxy: UGC2162
• A trail of dark matter-free galaxies from a bullet dwarf collision
• Globular Clusters in Coma Cluster Ultra Diffuse Galaxies (UDGs): Evidence for Two Types of UDG?
• Observational Properties of Ultra-Diffuse Galaxies in the Field: Field-UDGs are Predominantly Blue and Starforming
• Ultra-diffuse galaxies without dark matter
• The HI content of isolated ultra-diffuse galaxies: A sign of multiple formation mechanisms?
• Star cluster formation in the most extreme environments: Insights from the HiPEEC survey
• The evolution of ultra-diffuse galaxies in nearby galaxy clusters from the Kapteyn IAC WEAVE INT Clusters Survey ($\text{KIWICS}$)
• NGC5846-UDG1: A galaxy formed mostly by star formation in massive, extremely dense clumps of gas
• Atomic Gas in Blue Ultra Diffuse Galaxies around Hickson Compact Groups
• Origin and evolution of ultra-diffuse galaxies in different environments
• An Excess of Globular Clusters in UDGs Formed Through Tidal Heating
• The Mice at play in the CALIFA survey: A case study of a gas-rich major merger between first passage and coalescence
• The Application of the Montage Image Mosaic Engine To The Visualization Of Astronomical Images
• The globular clusters and star formation history of the isolated, quiescent ultra-diffuse galaxy DGSAT I
• Two Thresholds for Globular Cluster Formation and their Dominance of Star Formation in the Early-Universe
• The stellar populations of quiescent ultra-diffuse galaxies from optical to mid-infrared spectral energy distribution fitting
• Massive star cluster formation and evolution in tidal dwarf galaxies
• Gas-rich, field ultra-diffuse galaxies host few globular clusters
• On the Properties of Spectroscopically-Confirmed Ultra-Diffuse Galaxies Across Environment
• The SAMI Galaxy Survey: the drivers of gas and stellar metallicity differences in galaxies
• 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
• Metallicities and ages for star clusters and their surrounding fields in the Large Magellanic Cloud
• Fraction of Stars in Clusters for the LEGUS Dwarf Galaxies
• Multiple Beads-on-a-string: Dark Matter-Deficient Galaxy Formation in a Mini-bullet Satellite-satellite Galaxy Collision
• A new class of dark matter-free dwarf galaxies? I. Clues from FCC 224, NGC 1052-DF2 and NGC 1052-DF4
• Looking into the faintEst WIth MUSE (LEWIS): Exploring the nature of ultra-diffuse galaxies in the Hydra-I cluster II. Stellar kinematics and dynamical masses
• Recovering the origins of the lenticular galaxy NGC 3115 using multi-band imaging
• An Unexplained Origin for the Unusual Globular Cluster System in the Ultra-diffuse Galaxy FCC 224
• Signs of `Everything Everywhere All At Once' formation in low surface brightness globular cluster-rich dwarf galaxies
• The large-scale structure of globular clusters in the NGC 1052 group
• Looking into the faintEst WIth MUSE (LEWIS): Exploring the nature of ultra-diffuse galaxies in the Hydra I cluster III. Untangling UDG 32 from the stripped filaments of NGC 3314A with multi-wavelength data

Cited by in corpus (1)

• GAMA 526784: the progenitor of a globular cluster-rich ultra-diffuse galaxy? II. Molecular gas, neutral gas and environment