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UGC 2369S: A Kiloparsec-scale Triple Merger Candidate Identified in a Nearby Luminous Infrared Galaxy

  • Authors: Yuanze Ding, Michael J. Koss, Fiona A. Harrison, Charles C. Steidel, Connor Auge, Jared Gillette, Erica Hammerstein, Ruancun Li, Macon Magno, Ignacio del Moral-Castro, Alessandro Peca, Claudio Ricci, Yiqing Song, Ezequiel Treister, Zhuyun Zhuang

Yuanze Ding et al 2026 The Astrophysical Journal 1002 .

  • Provider: AAS Journals

Caption: Figure 15.

Top: stellar mass surface density profile for each core, fitted by power laws (magenta). The dips at small radii for objects 1 and 3 are due to heavy dust obscuration. Spatial resolution is ﹩\simeq \,0\mathop{.}\limits{^{\prime\prime} }05﹩. Bottom: stellar velocity dispersion radial distribution based on seeing-limited KCWI observation. We indicate the radial bin size and median standard deviation within each bin with reference error bars on the right of each subfigure. These measurements are consistent with objects 1 and 2 being tidally stripped satellites. While the values for object 2 in Figure 4 may appear inconsistent with those presented here, the discrepancy arises from the differing weighting methods employed; Figure 4 displays a flux-weighted spectrum, whereas the values in this section represent a direct spatial average of individual spaxels within each annulus.

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