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  Systematically Measuring Ultra-diffuse Galaxies (SMUDGes). I. Survey Description and First Results in the Coma Galaxy Cluster and Environs

Zaritsky, D., Donnerstein, R., Dey, A., Kadowaki, J., Zhang, H., Karunakaran, A., et al. (2019). Systematically Measuring Ultra-diffuse Galaxies (SMUDGes). I. Survey Description and First Results in the Coma Galaxy Cluster and Environs. The Astrophysical Journal Supplement Series, 240.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0005-CF5E-A Version Permalink: https://hdl.handle.net/21.11116/0000-0005-CF5F-9
Genre: Journal Article

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https://ui.adsabs.harvard.edu/abs/2019ApJS..240....1Z (Any fulltext)
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 Creators:
Zaritsky, Dennis1, Author
Donnerstein, Richard1, Author
Dey, Arjun1, Author
Kadowaki, Jennifer1, Author
Zhang, Huanian1, Author
Karunakaran, Ananthan1, Author
Martínez-Delgado, David1, Author
Rahman, Mubdi1, Author
Spekkens, Kristine1, Author
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

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Free keywords: galaxies: evolution galaxies: fundamental parameters galaxies: structure Astrophysics - Astrophysics of Galaxies
 Abstract: We present a homogeneous catalog of 275 large (effective radius ≳5.″3) ultra-diffuse galaxy (UDG) candidates lying within an ≈290 square degree region surrounding the Coma Cluster. The catalog results from our automated postprocessing of data from the Legacy Surveys, a three-band imaging survey covering 14,000 square degrees of the extragalactic sky. We describe a pipeline that identifies UDGs and provides their basic parameters. The survey is as complete in these large UDGs as previously published UDG surveys of the central region of the Coma Cluster. We conclude that the majority of our detections are at roughly the distance of the Coma Cluster, implying effective radii ≥2.5 kpc, and that our sample contains a significant number of analogs of DF44, where the effective radius exceeds 4 kpc, both within the cluster and in the surrounding field. The g - z color of our UDGs spans a large range, suggesting that even large UDGs may reflect a range of formation histories. A majority of the UDGs are consistent with being lower stellar mass analogs of red sequence galaxies, but we find both red and blue UDG candidates in the vicinity of the Coma Cluster and a relative overabundance of blue UDG candidates in the lower-density environments and the field. Our eventual processing of the full Legacy Surveys data will produce the largest, most homogeneous sample of large UDGs.

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 Dates: 2019
 Publication Status: Issued
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Title: The Astrophysical Journal Supplement Series
Source Genre: Journal
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Pages: - Volume / Issue: 240 Sequence Number: - Start / End Page: - Identifier: -