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Systematically Measuring Ultra-diffuse Galaxies (SMUDGes). V. The Complete SMUDGes Catalog and the Nature of Ultradiffuse Galaxies

Journal Article · · The Astrophysical Journal. Supplement Series
 [1];  [1];  [2];  [3];  [1];  [1];  [4];  [5]
  1. University of Arizona, Tucson, AZ (United States)
  2. NOIRLab, Tucson, AZ (United States)
  3. Instituto de Astrofisica de Andalucia (CSIC), Granada (Spain)
  4. Queen's University, Kingston, ON (Canada); Royal Military College of Canada, Kingston, ON (Canada)
  5. University of Arizona, Tucson, AZ (United States); Huazhong University of Science and Technology, Wuhan (China)
We present the completed catalog of ultradiffuse galaxy (UDG) candidates (7070 objects) from our search of the DR9 Legacy Survey images, including distance and total mass estimates for 1529 and 1436 galaxies, respectively, that we provide and describe in detail. From the sample with estimated distances, we obtain a sample of 585 UDGs (μ0,g ≥ 24 mag arcsec–2 and re ≥ 1.5 kpc) over 20,000 square degrees of sky in various environments. We conclude that UDGs in our sample are limited to 1010 ≲ Mh/M ≲ 1011.5 and are on average a factor of 1.5–7 deficient in stars relative to the general population of galaxies of the same total mass. That factor increases with increasing galaxy size and mass up to a factor of ~10 when the total mass of the UDG increases beyond Mh = 1011M. We do not find evidence that this factor has a dependence on the UDGs large-scale environment.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
Chinese Academy of Sciences; National Natural Science Foundation of China (NSFC); National Science Foundation (NSF); USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
2423110
Journal Information:
The Astrophysical Journal. Supplement Series, Journal Name: The Astrophysical Journal. Supplement Series Journal Issue: 2 Vol. 267; ISSN 0067-0049
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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