Dynamics of AGN feedback in the X-ray bright eastern and southwestern “arms” of M87, mapped by XRISM

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Volume 707 (March 2026)

A&A, 707 (2026) A124

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Table 4.

Results of jointly fitting all three off-center observations of M87, as described in Section 4.3.3.

Region	E	SW	NW

kT₁ (keV)	1.50(−0.09, +0.11)		–

norm₁	1.97 $_{- 0.34}^{+ 0.34}$ $Mathematical equation: $ _{-0.34}^{+0.34} $$	0.90 $_{- 0.24}^{+ 0.29}$ $Mathematical equation: $ _{-0.24}^{+0.29} $$	0 (fixed)
v₁ (km/s)	76(−32, +40)	−322(−74, +57)	–

σ_v1 (km/s)	153(−21, +40)		–

kT₂ (keV)	2.23 ± 0.04

norm₂	2.32 $_{- 0.35}^{+ 0.31}$ $Mathematical equation: $ _{-0.35}^{+0.31} $$	3.03 $_{- 0.25}^{+ 0.22}$ $Mathematical equation: $ _{-0.25}^{+0.22} $$	3.83 $_{- 0.09}^{+ 0.09}$ $Mathematical equation: $ _{-0.09}^{+0.09} $$
v₂ (km/s)	−42 ± 12	−60 ± 10	−46 ± 7

σ_v2 (km/s)	43(−11, +14)

flux_LMXB	$- 12 . 39_{- 0.12}^{+ 0.09}$ $Mathematical equation: $ -12.39_{-0.12}^{+0.09} $$	$- 12 . 62_{- 0.22}^{+ 0.15}$ $Mathematical equation: $ -12.62_{-0.22}^{+0.15} $$	$- 12 . 50_{- 0.18}^{+ 0.13}$ $Mathematical equation: $ -12.50_{-0.18}^{+0.13} $$

C-stat/d.o.f.	9172/8710

Notes. All velocities are reported with respect to a rest frame heliocentric redshift of 0.00428. The LMXB flux is given in log(erg/s/cm²) in the 2–7 keV band. The normalizations of the thermal components are given in 1e-2 Xspec units (Eq. (1)).

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