Estimating the mass-to-distance ratio for a set of megamaser AGN black holes by employing a general relativistic method

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Volume 689 (September 2024)

A&A, 689 (2024) A205

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Table 1.

Best fitted values of our estimations.

Source	M/D	x₀	y₀	z_rec	v_rec	δφ	$χ_{red}^{2}$ $\chi^2_{red}$
	(10⁵ M_⊙/Mpc)	(mas)	(mas)	(10⁻²)	(km/s)	(°)
NGC 1194	$13 . 100_{- 0.209}^{+ 0.211}$ $13.100^{+0.211}_{-0.209}$	$0 . 379_{- 0.131}^{+ 0.133}$ $0.379 ^{+0.133}_{-0.131}$	0.0 ^( * )	1.363 ± 0.004	$4085 . 984_{- 12.421}^{+ 12.527}$ $4085.984^{+12.527}_{-12.421}$	11	1.206


NGC 5495	$1 . 153_{- 0.174}^{+ 0.208}$ $1.153^{+0.208}_{-0.174}$	$- 0 . 071_{- 0.118}^{+ 0.174}$ $-0.071^{+0.174}_{-0.118}$	0.0 ^( * )	$2 . 281_{- 0.019}^{+ 0.018}$ $2.281^{+0.018}_{-0.019}$	$6839 . 055_{- 57.772}^{+ 53.393}$ $6839.055^{+53.393}_{-57.772}$	0	0.282


Mrk 1029	0.144 ± 0.011	$- 0 . 376_{- 0.138}^{+ 0.143}$ $-0.376^{+0.143}_{-0.138}$	0.0 ^( * )	3.035 ± 0.004	$9099 . 332_{- 11.252}^{+ 12.710}$ $9099.332^{+12.710}_{-11.252}$	14	1.385


NGC 1320	$1 . 497_{- 0.069}^{+ 0.071}$ $1.497^{+0.071}_{-0.069}$	$- 1 . 243_{- 0.132}^{+ 0.147}$ $-1.243^{+0.147}_{-0.132}$	$- 0 . 761_{- 0.142}^{+ 0.149}$ $-0.761^{+0.149}_{-0.142}$	0.942 ± 0.002	$2825 . 433_{- 6.389}^{+ 6.158}$ $2825.433^{+6.158}_{-6.389}$	17	1.127

Notes. Column 1: Name of the source. Column 2: Fitted mass-to-distance ratio. Column 3: Horizontal offset (x₀) of the BH found by the Bayesian fit. Column 4: Vertical offset (y₀) of the BH either found by the Bayesian fit or fixed. Column 5: Recessional redshift found by the fit. Column 6: Recession velocity after the optical definition of the redshift. Column 7: Scattering in the azimuth angle. Column 8: Reduced χ² of the best fit. The double horizontal line separates different galaxies according to the number of estimated parameters. We estimate three parameters for the first three galaxies and four parameters for the fourth galaxy.

The label ^( * ) indicates that we fixed this parameter.

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