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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 10.

Electron density map derived from [S II] λλ6717, 6731 doublet ratio, assuming electron temperature of 104 K. The values we obtained are slightly higher than the average value from LIRG and reach>103 cm−3 in the core of object 3. This is a significant fraction of [O II]’s critical electron density (3 × 103 cm−3) and might indicate the existence of a buried narrow-line region (more discussion in Section 4.1).

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