Journal article
VLA Imaging of H i-bearing Ultra-diffuse Galaxies from the ALFALFA Survey
The Astrophysical journal, Vol.909(1), p.19
03/01/2021
DOI: 10.3847/1538-4357/abd79d
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 H i-bearing ultra-diffuse galaxies (HUDs) from the Karl G. Jansky Very Large Array, as well as deep optical imaging from the WIYN 3.5 m telescope at Kitt Peak National Observatory. We present the data processing and images, including total intensity H i maps and H i velocity fields. The HUDs show ordered gas distributions and evidence of rotation, important prerequisites for the detailed kinematic models of Mancera Pina et al. We compare the H i and stellar alignment and extent, and find that H i extends beyond the already extended stellar component and the H i 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 H i mass-diameter scaling relation, and find that, although the HUDs have diffuse stellar populations, they fall along the relation with typical global H i surface densities. This resolved sample forms an important basis for more detailed study of the H i distribution in this extreme extragalactic population.
Details
- Title: Subtitle
- VLA Imaging of H i-bearing Ultra-diffuse Galaxies from the ALFALFA Survey
- Creators
- Lexi Gault - Valparaiso UniversityLukas Leisman - Valparaiso UniversityElizabeth A. K. Adams - Netherlands Institute for Radio AstronomyPavel E. Mancera Pina - Netherlands Inst Radio Astron, ASTRON, Oude Hoogeveensedijk 4, NL-7991 PD Dwingeloo, NetherlandsKameron Reiter - Valparaiso UniversityNicholas Smith - Indiana University BloomingtonMichael Battipaglia - Valparaiso UniversityJohn M. Cannon - Macalester CollegeFilippo Fraternali - University of GroningenMartha P. Haynes - Cornell UniversityElizabeth McAllan - Valparaiso UniversityHannah J. Pagel - Indiana University BloomingtonKatherine L. Rhode - Indiana University BloomingtonJohn J. Salzer - Indiana University BloomingtonQuinton Singer - Macalester College
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.909(1), p.19
- Publisher
- Iop Publishing Ltd
- DOI
- 10.3847/1538-4357/abd79d
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Number of pages
- 13
- Grant note
- 0607007; 1107390; 1714828 / NSF/AST; National Science Foundation (NSF) WISE research program - Netherlands Organization for Scientific Research (NWO); Netherlands Organization for Scientific Research (NWO) NWO; Netherlands Organization for Scientific Research (NWO) Macalester College Brinson Foundation 10.1.5.6 / Netherlands Research School for Astronomy (Nederlandse Onderzoekschool voor Astronomie, NOVA), Phase-5 research program Network 1 AST-1100968 / National Science Foundation; National Science Foundation (NSF) AST-1615483 / NSF; National Science Foundation (NSF) Valparaiso University
- Language
- English
- Date published
- 03/01/2021
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984627313902771
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