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The Next Generation Virgo Cluster Survey (NGVS). XXXVI. Caught in the Act of Transformation: Morphological Decomposition and Classification of Ultracompact Dwarf Galaxies in the Virgo Cluster

  • Authors: Kaixiang Wang, Eric W. Peng, Chengze Liu, Laura Ferrarese, Patrick Côté, J. Christopher Mihos, Matthew A. Taylor, John P. Blakeslee, Jean-Charles Cuillandre, Pierre-Alain Duc, Puragra Guhathakurta, Stephen Gwyn, Youkyung Ko, Ariane Lançon, Sungsoon Lim, Lauren A. MacArthur, Thomas Puzia, Joel Roediger, Laura V. Sales, Rubén Sánchez-Janssen, Chelsea Spengler, Elisa Toloba, Hong-Xin Zhang, Mingcheng Zhu

Kaixiang Wang et al 2026 The Astrophysical Journal Supplement Series 285 .

  • Provider: AAS Journals

Caption: Figure 11.

The distribution of UCD half-light radius rh with envelope parameter Δenv ≡ g16–g32. Filled orange, green, and blue circles are certain, probable, and possible eUCDs from the classification and subsequent spectroscopic confirmation in this work. Open circles indicate UCD candidates without spectroscopic observation. We use the half-light radius rh and Δenv parameter from the measurement of C. Liu et al. (2020), where rh is measured with the single King model in KINGPHOT. The rough dividing criterion of UCDs with and without envelopes, Δenv = 0.06, is shown by the dashed vertical line.

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