Black hole accretion and radiation variability in general relativistic magnetohydrodynamic simulations with Rezzolla–Zhidenko spacetime

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Volume 694 (February 2025)

A&A, 694 (2025) A135

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Table 2

Time-averaged mass accretion rate, magnetic flux, and normalized magnetic flux in GRMHD simulations across different spacetimes.

Metric	$(a_{1}, \bar{ℓ})$ $\left( {{a_1},\bar \ell } \right)$	Ṁ	Ṁ (M_⊙/year)	ϕ_BH	Ψ
`Sch`	0.00	0.12 ± 0.03	1.15 × 10⁻⁷ −1.92 × 10⁻⁷	1.80 ± 0.01	5.40 ± 0.56

`A`	−0.50	0.03 ± 0.01	2.33 × 10⁻⁸ −4.67 × 10⁻⁸	1.75 ± 0.01	10.00 ± 1.59
	−0.25	0.12 ± 0.07	5.95 × 10⁻⁸ −2.26 × 10⁻⁷	1.82 ± 0.01	6.13 ± 1.81
	0.25	0.12 ± 0.03	1.10 × 10⁻⁷ −1.83 × 10⁻⁷	1.88 ± 0.12	5.58 ± 0.67
	0.50	0.09 ± 0.04	5.94 × 10⁻⁸ −1.55 × 10⁻⁷	2.01 ± 0.19	7.14 ± 1.50

`AS`	−0.25	0.03 ± 0.02	9.80 × 10⁻⁹ −4.90 × 10⁻⁸	1.87 ± 0.02	12.20 ± 2.94
	0.00	0.08 ± 0.03	6.54 × 10⁻⁸ −1.44 × 10⁻⁷	1.82 ± 0.03	6.95 ± 1.14
	0.25	0.06 ± 0.02	2.49 × 10⁻⁸ −4.99 × 10⁻⁸	1.96 ± 0.01	8.23 ± 1.24
	0.50	0.04 ± 0.03	8.85 × 10⁻⁹ −6.20 × 10⁻⁸	1.96 ± 0.02	11.40 ± 2.58

`Hay`	0.75	0.06 ± 0.04	1.29 × 10⁻⁸ −6.47 × 10⁻⁸	1.89 ± 0.05	8.22 ± 1.74

Notes. The mass accretion rate (Ṁ) is presented in code units and M_⊙/year, with the rescaling factor of the GRRT simulation used to match the mean total flux of approximately 2.3 Jy. The magnetic flux and normalized magnetic flux are expressed in code units (see also the main text).

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