VLA Imaging of HI-bearing Ultra-Diffuse Galaxies from the ALFALFA Survey

Abstract

Ultra-diffuse galaxies have generated significant interest due to their large optical extents and low optical surface brightnesses, which challenge galaxy formation models. Here we present resolved synthesis observations of 12 HI-bearing ultra-diffuse galaxies (HUDs) from the Karl G. Jansky Very Large Array (VLA), as well as deep optical imaging from the WIYN 3.5-meter telescope at Kitt Peak National Observatory. We present the data processing and images, including total intensity HI maps and HI velocity fields. The HUDs show ordered gas distributions and evidence of rotation, important prerequisites for the detailed kinematic models in Mancera Piña et al. (2019b). We compare the HI and stellar alignment and extent, and find the HI extends beyond the already extended stellar component and that the HI disk is often misaligned with respect to the stellar one, emphasizing the importance of caution when approaching inclination measurements for these extreme sources. We explore the HI mass-diameter scaling relation, and find that although the HUDs have diffuse stellar populations, they fall along the relation, with typical global HI surface densities. This resolved sample forms an important basis for more detailed study of the HI distribution in this extreme extragalactic population.

arXiv comment17 pages, 7 figures, 4 tables, accepted to ApJ

References in corpus (38)

• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The Baryonic Tully-Fisher Relation
• The Arecibo Legacy Fast ALFA Survey: I. Science Goals, Survey Design and Strategy
• SPARC: Mass Models for 175 Disk Galaxies with Spitzer Photometry and Accurate Rotation Curves
• The Arecibo Legacy Fast ALFA Survey: The alpha.40 HI Source Catalog, its Characteristics and their Impact on the Derivation of the HI Mass Function
• Forty-Seven Milky Way-Sized, Extremely Diffuse Galaxies in the Coma Cluster
• The Baryonic Tully-Fisher Relation of Galaxies with Extended Rotation Curves and the Stellar Mass of Rotating Galaxies
• The Arecibo Legacy Fast ALFA Survey: The ALFALFA Extragalactic HI Source Catalog
• A galaxy lacking dark matter
• The Atlas3D project -- XIII. Mass and morphology of HI in early-type galaxies as a function of environment
• The Ursa Major Cluster of Galaxies. IV ; HI synthesis observations
• New Lessons from the HI Size-Mass Relation of Galaxies
• A High Stellar Velocity Dispersion and ~100 Globular Clusters for the Ultra Diffuse Galaxy Dragonfly 44
• Ultra Low Surface Brightness Imaging with the Dragonfly Telephoto Array
• (Almost) Dark Galaxies in the ALFALFA Survey: Isolated HI Bearing Ultra Diffuse Galaxies
• Ultra diffuse galaxies outside clusters: clues to their formation and evolution
• HI holes and high-velocity clouds in the spiral galaxy NGC 6946
• Illuminating Low-Surface-Brightness Galaxies with the Hyper Suprime-Cam Survey
• A distance of 13 Mpc resolves the claimed anomalies of the galaxy lacking dark matter
• Off the baryonic Tully-Fisher relation: a population of baryon-dominated ultra-diffuse galaxies
• Volumetric star formation laws of disc galaxies
• The impact of stellar feedback on the structure, size and morphology of galaxies in Milky Way size dark matter haloes
• Robust HI kinematics of gas-rich ultra-diffuse galaxies: hints of a weak-feedback formation scenario
• Does low surface brightness mean low surface density?
• Observational Properties of Ultra-Diffuse Galaxies in the Field: Field-UDGs are Predominantly Blue and Starforming
• The Atlas3D project - XXVI. HI discs in real and simulated fast and slow rotators
• The evolution of ultra-diffuse galaxies in nearby galaxy clusters from the Kapteyn IAC WEAVE INT Clusters Survey ($\text{KIWICS}$)
• Extragalactic HI Surveys
• Atomic Gas in Blue Ultra Diffuse Galaxies around Hickson Compact Groups
• Mass-to-Light versus Color Relations for Dwarf Irregular Galaxies
• Origin of the galaxy HI size-mass relation
• The environment of HI-bearing ultra diffuse galaxies in the ALFALFA survey
• Self-consistent Color-Mass-to-Light-Ratio relations for Low Surface Brightness Galaxies
• The angular momentum of disc galaxies at z=1
• The contribution of HI-bearing ultra-diffuse galaxies to the cosmic number density of galaxies
• Revisiting the Size-Luminosity Relation in the Era of Ultra Diffuse Galaxies
• Edge-on HI-bearing ultra diffuse galaxy candidates in the 40% ALFALFA catalog
• Moment Analysis Applied to LMC Star Clusters

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