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A Pride of Satellites in the Constellation Leo? Discovery of the Leo VI Milky Way Satellite Ultra-faint Dwarf Galaxy with DELVE Early Data Release 3

Authors: C. Y. Tan, W. Cerny, A. Drlica-Wagner, A. B. Pace, M. Geha, A. P. Ji, T. S. Li, M. Adamów, D. Anbajagane, C. R. Bom, J. A. Carballo-Bello, J. L. Carlin, C. Chang, A. Chaturvedi, A. Chiti, Y. Choi, M. L. M. Collins, A. Doliva-Dolinsky, P. S. Ferguson, R. A. Gruendl, D. J. James, G. Limberg, M. Navabi, D. Martínez-Delgado, C. E. Martínez-Vázquez, G. E. Medina, B. Mutlu-Pakdil, D. L. Nidever, N. E. D. Noël, A. H. Riley, J. D. Sakowska, D. J. Sand, J. Sharp, G. S. Stringfellow, C. Tolley, D. L. Tucker, A. K. Vivas

C. Y. Tan et al 2025 The Astrophysical Journal 979 .

Provider: AAS Journals

Caption: Figure 4.

Jackknife test for the radial velocity parameters of Leo VI. The gray regions represent the 68% percentile uncertainty of the parameters obtained from the full sample. Each point represents the parameters obtained using a subsample that has excluded one star. The velocity dispersion measurement of the system becomes unresolved when we remove either one of the two very-high-S/N stars (S/N > 15) with a large difference in line-of-sight velocity between each other (v_hel = 164.6 ± 1.6 and 174.0 ± 1.7 km s⁻¹).

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