Revised spin for the black hole in GRS 1716-249 given a new distance determination

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Volume 691 (November 2024)

A&A, 691 (2024) A192

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Table 5.

Fitting results of partial parameters with M2 by assuming different distances.

D (kpc)	2.4 (`M2A`)	3	4	5	6	6.9 (`M2B`)	8
M = 6.4M_⊙
a_*	$0 . 972_{- 0.005}^{+ 0.004}$ $0.972_{-0.005}^{+0.004}$ ( $0 . 946_{- 0.008}^{+ 0.012}$ $0.946_{-0.008}^{+0.012}$ )	$0 . 958_{- 0.011}^{+ 0.007}$ $0.958_{-0.011}^{+0.007}$ ( $0 . 847_{- 0.005}^{+ 0.013}$ $0.847_{-0.005}^{+0.013}$ )	$0 . 721_{- 0.004}^{+ 0.019}$ $0.721_{-0.004}^{+0.019}$	0.634 ± 0.014	$0 . 530_{- 0.007}^{+ 0.018}$ $0.530_{-0.007}^{+0.018}$	$0 . 464_{- 0.007}^{+ 0.016}$ $0.464_{-0.007}^{+0.016}$	$0 . 393_{- 0.015}^{+ 0.016}$ $0.393_{-0.015}^{+0.016}$
i (°)	$38 . 8_{- 0.6}^{+ 1.6}$ $38.8_{-0.6}^{+1.6}$ ( $44 . 1_{- 1.5}^{+ 1.3}$ $44.1_{-1.5}^{+1.3}$ )	$35 . 1_{- 0.7}^{+ 2.0}$ $35.1_{-0.7}^{+2.0}$ ( $47 . 0_{- 1.1}^{+ 0.7}$ $47.0_{-1.1}^{+0.7}$ )	$46 . 2_{- 1.1}^{+ 0.7}$ $46.2_{-1.1}^{+0.7}$	$44 . 7_{- 0.8}^{+ 0.9}$ $44.7_{-0.8}^{+0.9}$	$44 . 4_{- 0.7}^{+ 0.5}$ $44.4_{-0.7}^{+0.5}$	$43 . 8_{- 0.8}^{+ 0.5}$ $43.8_{-0.8}^{+0.5}$	$43 . 0_{- 0.8}^{+ 0.5}$ $43.0_{-0.8}^{+0.5}$
Ṁ	$15 . 4_{- 0.5}^{+ 0.4}$ $15.4_{-0.5}^{+0.4}$ ( $16 . 4_{- 0.9}^{+ 0.6}$ $16.4_{-0.9}^{+0.6}$ )	24.7 ± 1.0 ( $33 . 2_{- 1.4}^{+ 0.7}$ $33.2_{-1.4}^{+0.7}$ )	$70 . 8_{- 3.3}^{+ 0.8}$ $70.8_{-3.3}^{+0.8}$	$119_{- 3}^{+ 4}$ $119_{-3}^{+4}$	$188_{- 7}^{+ 3}$ $188_{-7}^{+3}$	$258_{- 8}^{+ 5}$ $258_{-8}^{+5}$	354 ± 9
A_Fe	> 9.3 (5)	> 9.3 (5)	$5 . 0_{- 0.2}^{+ 0.6}$ $5.0_{-0.2}^{+0.6}$	$5 . 0_{- 0.2}^{+ 0.7}$ $5.0_{-0.2}^{+0.7}$	$5 . 0_{- 0.3}^{+ 0.4}$ $5.0_{-0.3}^{+0.4}$	$5 . 0_{- 0.3}^{+ 0.4}$ $5.0_{-0.3}^{+0.4}$	$5 . 0_{- 0.3}^{+ 0.4}$ $5.0_{-0.3}^{+0.4}$

χ² [dof = 6358 (6359)]	6372.2 (6430.3)	6410.9 (6426.4)	6412.6	6409.0	6406.8	6406.9	6411.4

Notes. All errors are quoted at the 90% confidence level. The joint fitting results of BH spin, disk inclination, accretion rate of dataset 1, iron abundance, and goodness of fitting at different distances with M2 are listed in the table (values without parentheses). For distances of 2.4 and 3 kpc, besides the results with the iron abundance freely fitted, we also included the fitting parameters set to a fixed iron abundance of 5 (values in parentheses).

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