Galaxies and their dark-matter haloes have posed several challenges to the dark energy
plus cold dark matter (Λ CDM) cosmological model. These discrepancies between …

We present new H i interferometric observations of the gas-rich ultra-diffuse galaxy AGC
114905, which previous work, based on low-resolution data, identified as an outlier of the …

The ultra-diffuse galaxy NGC1052-DF2 has a very low velocity dispersion, indicating that it
has little or no dark matter. Here we report the discovery of a second galaxy in this class …

Recently a population of large, very low surface brightness, spheroidal galaxies was
identified in the Coma cluster. The apparent survival of these ultra-diffuse galaxies (UDGs) …

The current standard model of cosmology successfully describes a variety of measurements,
but the nature of its main ingredients, dark matter and dark energy, remains unknown. is a …

We address the origin of ultra-diffuse galaxies (UDGs), which have stellar masses typical of
dwarf galaxies but effective radii of Milky Way-sized objects. Their formation mechanism …

We present a sample of 115 very low optical surface brightness, highly extended, H i-rich
galaxies carefully selected from the ALFALFA survey that have similar optical absolute …

We identify six ultra-diffuse galaxies (UDGs) outside clusters in three nearby isolated groups
(0.014< z< 0.026) using very deep imaging in three different Sloan Digital Sky Survey filters …

We present a catalog of extended low surface brightness galaxies (LSBGs) identified in the
Wide layer of the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP). Using the …

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 …