Origin and evolution of ultra-diffuse galaxies in different environments
Sign Up to like & getrecommendations! Published in 2022 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stad1053
Abstract: We study the formation of ultra-diffuse galaxies (UDGs) using the cosmological hydrodynamical simulation TNG50 of the Illustris-TNG suite. We define UDGs as dwarf galaxies in the stellar mass range $\rm {7.5 \le log (M_{\star }… read more here.
Keywords: star; diffuse galaxies; ultra diffuse; different environments ... See more keywords
The multiple classes of ultra-diffuse galaxies: Can we tell them apart?
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DOI: 10.1093/mnras/stae2700
Abstract: This study compiles stellar populations and internal properties of ultra-diffuse galaxies (UDGs) to highlight correlations with their local environment, globular cluster (GC) richness, and star formation histories. Complementing our sample of 88 UDGs, we include… read more here.
Keywords: diffuse galaxies; ultra diffuse; surface brightness;
WALLABY: an untargeted search for H i -bearing ultra-diffuse galaxies uncovers the first known ultra-diffuse galaxy pair
Sign Up to like & getrecommendations! Published in 2025 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staf1840
Abstract: Using the Widefield ASKAP L-band Legacy All-sky Blind surveY (WALLABY) we performed an untargeted search for H i-bearing ultra-diffuse galaxies (UDGs). We identified a core sample of 10 UDGs defined by μg, 0 ≥ 24 mag arcsec−2… read more here.
Keywords: wallaby; ultra diffuse; diffuse; untargeted search ... See more keywords
Ultra-diffuse Galaxy Analogues in the Subaru Hyper-Suprime Cam Wide-field Clusters
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DOI: 10.1093/mnras/staf1850
Abstract: We perform a systematic statistical study of ultra-diffuse galaxy analogues (NUDGEs) in a large sample of galaxy clusters to investigate their properties with respect to the host clusters. We used data from the Hyper Suprime-Cam… read more here.
Keywords: ultra diffuse; galaxy analogues; suprime cam; hyper suprime ... See more keywords
Ultra-Diffuse, Ultra-Different: Observed vs. Simulated Ultra-Diffuse Galaxies Live in Fundamentally Different Halos
Sign Up to like & getrecommendations! Published in 2025 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staf1954
Abstract: In this work, we compare galaxies from the NIHAO and HESTIA simulation suites to ultra-diffuse galaxies (UDGs) with spectroscopically measured dynamical masses. For each observed UDG, we identify the simulated dark matter halo that best… read more here.
Keywords: ultra diffuse; dark matter; mass; halos ... See more keywords
Investigating the Ultra-diffuse Galaxy NGC5846_UDG1 through the Kinematics of its Rich Globular Cluster System
Sign Up to like & getrecommendations! Published in 2025 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staf559
Abstract: Recent studies of ultra-diffuse galaxies (UDGs) have shown their globular cluster (GC) systems to be central in unveiling their remarkable properties and halo masses. Deep HST imaging revealed 54 GC candidates around the UDG NGC5846_UDG1… read more here.
Keywords: ultra diffuse; system; globular cluster; kinematics ... See more keywords
Redshift, metallicity and size of two extended dwarf Irregular galaxies: a link between dwarf Irregulars and ultra diffuse galaxies?
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx236
Abstract: We present the results of the spectroscopic and photometric follow-up of two field galaxies that were selected as possible stellar counterparts of local high velocity clouds. Our analysis shows that the two systems are distant… read more here.
Keywords: dwarf irregular; diffuse galaxies; irregular galaxies; ultra diffuse ... See more keywords
The origin of ultra diffuse galaxies: stellar feedback and quenching.
Sign Up to like & getrecommendations! Published in 2018 at "Monthly notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty1153
Abstract: We test if the cosmological zoom-in simulations of isolated galaxies from the FIRE project reproduce the properties of ultra diffuse galaxies (UDGs). We show that outflows that dynamically heat galactic stars, together with a passively… read more here.
Keywords: range; diffuse galaxies; ultra diffuse; origin ultra ... See more keywords
A new formulation of the external field effect in MOND and numerical simulations of ultra-diffuse dwarf galaxies – application to NGC 1052-DF2 and NGC 1052-DF4
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz1465
Abstract: The ultra-diffuse dwarf galaxy NGC 1052-DF2 (DF2) has ten (eleven) measured globular clusters (GCs) with a line-of-sight velocity dispersion of $\sigma=7.8^{+5.2}_{-2.2}\,$km/s ($\sigma=10.6^{+3.9}_{-2.3}\,$km/s). Our conventional statistical analysis of the original ten GCs gives $\sigma=8.0^{+4.3}_{-3.0}\,$km/s. The overall… read more here.
Keywords: ngc 1052; mond; formulation; ultra diffuse ... See more keywords
Dark matter and H i in ultra-diffuse galaxy UGC 2162
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DOI: 10.1093/mnras/stz1884
Abstract: Our GMRT (Giant Metrewave Radio Telescope) H i observations of the ultra-diffuse galaxy (UDG) UGC 2162, projected ∼ 300 kpc from the centre of the M 77 group, reveal it to a have an extended H i disc ($R_{\rm H\,{\small… read more here.
Keywords: galaxy; dark matter; ultra diffuse; diffuse galaxy ... See more keywords
A model for core formation in dark matter haloes and ultra-diffuse galaxies by outflow episodes
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz3306
Abstract: We present a simple model for the response of a dissipationless spherical system to an instantaneous mass change at its center, describing the formation of flat cores in dark matter haloes and ultra-diffuse galaxies (UDGs)… read more here.
Keywords: haloes ultra; matter; dark matter; formation ... See more keywords