Exploring the nature of dark matter with the extreme galaxy AGC 114905

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Volume 689 (September 2024)

A&A, 689 (2024) A344

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Table 1.

Structural properties of the fitted dark matter haloes.

Halo	log(M₂₀₀)	log(c₂₀₀)	log(M₂₀₀)_MLE	log(c₂₀₀)_MLE	V_2 kpc	V_max	R_max	BIC
	[log(M_⊙)]		[log(M_⊙)]		[km/s]	[km/s]	[kpc]
CDM, CORENFW, Case 1	$9 . 36_{- 0.31}^{+ 0.37}$ $9.36^{+0.37}_{-0.31}$	$0 . 44_{- 0.27}^{+ 0.39}$ $0.44^{+0.39}_{-0.27}$	9.21	0.40	$11 . 1_{- 1.6}^{+ 1.6}$ $11.1^{+1.6}_{-1.6}$	$19 . 6_{- 3.5}^{+ 6.0}$ $19.6^{+6.0}_{-3.5}$	$21 . 4_{- 11.8}^{+ 29.4}$ $21.4^{+29.4}_{-11.8}$	$11 . 13_{- 1.05}^{+ 2.51}$ $11.13^{+2.51}_{-1.05}$
CDM, CORENFW, Case 2	$10 . 06_{0.07}^{+ 0.13}$ $10.06^{+0.13}_{0.07}$	$0 . 08_{- 0.06}^{+ 0.10}$ $0.08^{+0.10}_{-0.06}$	9.99	0.02	$11 . 3_{- 0.8}^{+ 1.0}$ $11.3^{+1.0}_{-0.8}$	$33 . 6_{- 2.0}^{+ 3.7}$ $33.6^{+3.7}_{-2.0}$	$84 . 4_{- 18.2}^{+ 14.9}$ $84.4^{+14.9}_{-18.2}$	$11 . 32_{- 0.53}^{+ 1.67}$ $11.32^{+1.67}_{-0.53}$
CDM, DPL, Case 1 ^( * )	$9 . 24_{- 0.29}^{+ 0.35}$ $9.24^{+0.35}_{-0.29}$	$0 . 57_{- 0.24}^{+ 0.15}$ $0.57^{+0.15}_{-0.24}$	9.20	0.63	$6 . 8_{- 2.9}^{+ 3.4}$ $6.8^{+3.4}_{-2.9}$	$13 . 0_{- 5.7}^{+ 4.4}$ $13.0^{+4.4}_{-5.7}$	$13 . 7_{- 5.8}^{+ 20.5}$ $13.7^{+20.5}_{-5.8}$	$12 . 99_{- 1.39}^{+ 3.17}$ $12.99^{+3.17}_{-1.39}$
CDM, DPL, Case 2 ^( * )	$10 . 16_{- 0.15}^{+ 0.39}$ $10.16^{+0.39}_{-0.15}$	$0 . 18_{- 0.12}^{+ 0.13}$ $0.18^{+0.13}_{-0.12}$	10.03	0.19	$4 . 3_{- 1.1}^{+ 1.5}$ $4.3^{+1.5}_{-1.1}$	$19 . 9_{- 5.2}^{+ 8.8}$ $19.9^{+8.8}_{-5.2}$	$71 . 5_{- 24.5}^{+ 40.0}$ $71.5^{+40.0}_{-24.5}$	$17 . 20_{- 3.48}^{+ 4.38}$ $17.20^{+4.38}_{-3.48}$
SIDM, Case 1	$9 . 21_{- 0.22}^{+ 0.25}$ $9.21^{+0.25}_{-0.22}$	$0 . 61_{- 0.19}^{+ 0.16}$ $0.61^{+0.16}_{-0.19}$	9.17	0.63	$12 . 0_{- 2.4}^{+ 2.2}$ $12.0^{+2.2}_{-2.4}$	$19 . 0_{- 2.7}^{+ 3.5}$ $19.0^{+3.5}_{-2.7}$	$11 . 1_{- 4.5}^{+ 10.2}$ $11.1^{+10.2}_{-4.5}$	$9 . 81_{- 1.41}^{+ 2.97}$ $9.81^{+2.97}_{-1.41}$
SIDM, Case 2	$10 . 08_{- 0.09}^{+ 0.21}$ $10.08^{+0.21}_{-0.09}$	$0 . 17_{- 0.11}^{+ 0.14}$ $0.17^{+0.14}_{-0.11}$	10.01	0.10	$7 . 5_{- 0.9}^{+ 1.4}$ $7.5^{+1.4}_{-0.9}$	$35 . 1_{- 2.5}^{+ 6.7}$ $35.1^{+6.7}_{-2.5}$	$65 . 6_{- 21.9}^{+ 26.4}$ $65.6^{+26.4}_{-21.9}$	$17 . 50_{- 1.49}^{+ 2.44}$ $17.50^{+2.44}_{-1.49}$
FDM, Case 1	$8 . 99_{- 0.57}^{+ 0.41}$ $8.99^{+0.41}_{-0.57}$	$0 . 58_{- 0.42}^{0.60}$ $0.58^{0.60}_{-0.42}$	9.09	0.09	$9 . 7_{- 2.1}^{+ 2.8}$ $9.7^{+2.8}_{-2.1}$	$18 . 8_{- 2.2}^{+ 2.6}$ $18.8^{+2.6}_{-2.2}$	$7 . 0_{- 1.8}^{+ 10.9}$ $7.0^{+10.9}_{-1.8}$	$16 . 26_{- 1.37}^{+ 2.03}$ $16.26^{+2.03}_{-1.37}$
FDM, Case 2	$10 . 04_{- 0.06}^{+ 0.11}$ $10.04^{+0.11}_{-0.06}$	$0 . 08_{- 0.06}^{+ 0.10}$ $0.08^{+0.10}_{-0.06}$	9.99	0.02	$9 . 1_{1.5}^{+ 2.1}$ $9.1^{+2.1}_{1.5}$	$33 . 3_{- 1.7}^{+ 3.0}$ $33.3^{+3.0}_{-1.7}$	$84 . 1_{- 18.6}^{+ 12.8}$ $84.1^{+12.8}_{-18.6}$	$18 . 95_{- 1.08}^{+ 1.70}$ $18.95^{+1.70}_{-1.08}$

Notes. The first column lists the corresponding mass model. Case 1 considers a broad log(M₂₀₀) prior, while for Case 2 a lower limit on log(M₂₀₀) was imposed. The second and third columns give the halo mass and concentration parameters. The values and uncertainties in log(M₂₀₀) and log(c₂₀₀) come from the 16th, 50th, and 84th percentiles of the posterior distributions shown in Appendix D. The fourth and fifth columns provide the maximum-likelihood estimation (MLE) of log(M₂₀₀) and log(c₂₀₀) (the remaining MLE parameters are given in the corresponding figures of each mass model). The sixth, seventh, and eighth columns give V_2 kpc, V_max, and R_max, respectively. These values are obtained by reconstructing and sampling the MCMC chains of each mass model and obtaining the distribution of those parameters. Finally, the last column gives the BIC of each model computed from the posterior distributions. ^( * )The DPL (double power-law) fits are shown in Appendix C and included here for completeness.

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