Chemo-dynamics of the stellar component of the Sculptor dwarf galaxy - I. Observed properties

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Volume 692 (December 2024)

A&A, 692 (2024) A195

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Table 3

Mock galaxy parameters and best-fit ones.

Input	f	ℳ	σ_ℳ	𝒱 (km s⁻¹)	σ_𝒱 (km s⁻¹)
MR	0.27	0.61	0.15	180.4	16.8
MP	0.71	0.12	0.15	179.7	22.5
Pop 3	0.02	−0.5	0.3	217.8	10

Fit	f	ℳ	σ_ℳ	𝒱 (km s⁻¹)	σ_𝒱 (km s⁻¹)

MR	${0.27}_{- 0.02}^{+ 0.02}$ $\[0.27_{-0.02}^{+0.02}\]$	${0.62}_{- 0.02}^{+ 0.02}$ $\[0.62_{-0.02}^{+0.02}\]$	${0.15}_{- 0.01}^{+ 0.01}$ $\[0.15_{-0.01}^{+0.01}\]$	${181.8}_{- 1.0}^{+ 1.0}$ $\[181.8_{-1.0}^{+1.0}\]$	${17.1}_{- 0.7}^{+ 0.8}$ $\[17.1_{-0.7}^{+0.8}\]$
MP	${0.71}_{- 0.02}^{+ 0.02}$ $\[0.71_{-0.02}^{+0.02}\]$	${0.125}_{- 0.009}^{+ 0.009}$ $\[0.125_{-0.009}^{+0.009}\]$	${0.148}_{- 0.007}^{+ 0.007}$ $\[0.148_{-0.007}^{+0.007}\]$	${179.3}_{- 0.7}^{+ 0.7}$ $\[179.3_{-0.7}^{+0.7}\]$	${21.7}_{- 0.6}^{+ 0.6}$ $\[21.7_{-0.6}^{+0.6}\]$
Pop 3	${0.018}_{- 0.005}^{+ 0.004}$ $\[0.018_{-0.005}^{+0.004}\]$	$- {0.5}_{- 0.1}^{+ 0.1}$ $\[-0.5_{-0.1}^{+0.1}\]$	${0.35}_{- 0.10}^{+ 0.11}$ $\[0.35_{-0.10}^{+0.11}\]$	$219_{- 3}^{+ 3}$ $\[219_{-3}^{+3}\]$	$12_{- 2}^{+ 2}$ $\[12_{-2}^{+2}\]$

Notes. Comparison between mock parameters (upper part) and best fit ones after applying our chemo-dynamical analysis on a mock galaxy (lower part). Col. 1 lists the population the parameters are referred to; Cols. 2 and 3 show the mean and the width of the metallicity distributions, respectively; and, Cols. 4 and 5 list the mean and width of the velocity distributions.

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