Systematically Measuring Ultra-Diffuse Galaxies. VIII. Misfits, Miscasts, and Miscreants
We re-examine the 7,070 candidate ultra-diffuse galaxies (UDGs) in the SMUDGes survey and provide classifications based on their visual morphology. Among the more interesting cases, we identify objects along a low surface brightness galaxy merger sequence (ongoing mergers (8) and post-mergers (7)) a...
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| Format: | Article |
| Language: | English |
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Maynooth Academic Publishing
2025-07-01
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| Series: | The Open Journal of Astrophysics |
| Online Access: | https://doi.org/10.33232/001c.142073 |
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| _version_ | 1839634256655024128 |
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| author | Dennis Zaritsky Richard Donnerstein Donghyeon J. Khim |
| author_facet | Dennis Zaritsky Richard Donnerstein Donghyeon J. Khim |
| author_sort | Dennis Zaritsky |
| collection | DOAJ |
| description | We re-examine the 7,070 candidate ultra-diffuse galaxies (UDGs) in the SMUDGes survey and provide classifications based on their visual morphology. Among the more interesting cases, we identify objects along a low surface brightness galaxy merger sequence (ongoing mergers (8) and post-mergers (7)) and a distinct set of dwarf ring galaxies (29). The ring galaxies are hypothesized to be the result of nearly polar-axis collisions, but the responsible companions are undetected. We also highlight objects in the catalog that appear to be tidally affected (66), thereby cautioning that their cataloged parameters may be unreliable. Finally, we identify contaminants of various types in the catalog, leaving 6,553 as viable undisturbed UDG candidates. We discuss all categories and provide example images of the more interesting ones. |
| format | Article |
| id | doaj-art-7af855f8df5e41d8b624fb6536d07628 |
| institution | Matheson Library |
| issn | 2565-6120 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Maynooth Academic Publishing |
| record_format | Article |
| series | The Open Journal of Astrophysics |
| spelling | doaj-art-7af855f8df5e41d8b624fb6536d076282025-07-10T07:08:58ZengMaynooth Academic PublishingThe Open Journal of Astrophysics2565-61202025-07-018Systematically Measuring Ultra-Diffuse Galaxies. VIII. Misfits, Miscasts, and MiscreantsDennis ZaritskyRichard DonnersteinDonghyeon J. KhimWe re-examine the 7,070 candidate ultra-diffuse galaxies (UDGs) in the SMUDGes survey and provide classifications based on their visual morphology. Among the more interesting cases, we identify objects along a low surface brightness galaxy merger sequence (ongoing mergers (8) and post-mergers (7)) and a distinct set of dwarf ring galaxies (29). The ring galaxies are hypothesized to be the result of nearly polar-axis collisions, but the responsible companions are undetected. We also highlight objects in the catalog that appear to be tidally affected (66), thereby cautioning that their cataloged parameters may be unreliable. Finally, we identify contaminants of various types in the catalog, leaving 6,553 as viable undisturbed UDG candidates. We discuss all categories and provide example images of the more interesting ones.https://doi.org/10.33232/001c.142073 |
| spellingShingle | Dennis Zaritsky Richard Donnerstein Donghyeon J. Khim Systematically Measuring Ultra-Diffuse Galaxies. VIII. Misfits, Miscasts, and Miscreants The Open Journal of Astrophysics |
| title | Systematically Measuring Ultra-Diffuse Galaxies. VIII. Misfits, Miscasts, and Miscreants |
| title_full | Systematically Measuring Ultra-Diffuse Galaxies. VIII. Misfits, Miscasts, and Miscreants |
| title_fullStr | Systematically Measuring Ultra-Diffuse Galaxies. VIII. Misfits, Miscasts, and Miscreants |
| title_full_unstemmed | Systematically Measuring Ultra-Diffuse Galaxies. VIII. Misfits, Miscasts, and Miscreants |
| title_short | Systematically Measuring Ultra-Diffuse Galaxies. VIII. Misfits, Miscasts, and Miscreants |
| title_sort | systematically measuring ultra diffuse galaxies viii misfits miscasts and miscreants |
| url | https://doi.org/10.33232/001c.142073 |
| work_keys_str_mv | AT denniszaritsky systematicallymeasuringultradiffusegalaxiesviiimisfitsmiscastsandmiscreants AT richarddonnerstein systematicallymeasuringultradiffusegalaxiesviiimisfitsmiscastsandmiscreants AT donghyeonjkhim systematicallymeasuringultradiffusegalaxiesviiimisfitsmiscastsandmiscreants |