Cocoon shock, X-ray cavities, and extended inverse Compton emission in Hercules A: Clues from Chandra observations

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Volume 693 (January 2025)

A&A, 693 (2025) A171

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Table A.1.

Spectral analysis of the surface brightness edges in Hercules A.

	C-stat/D.o.f.	Side	Net counts	R_i	R_o	kT	p_ICM	n_e
				[kpc (″)]	[kpc (″)]	[keV]	[10⁻¹¹	[10⁻³
							erg cm⁻³]	cm⁻³]
North-South^a	5507.8/5320 (1.04)	downstream	8296	104.6 (39.4)	149.5 (56.3)	5.68 $_{- 0.33}^{+ 0.29}$ $^{+0.29}_{-0.33}$ (5.01 $_{- 0.24}^{+ 0.26}$ $^{+0.26}_{-0.24}$ )	6.89 $_{- 0.46}^{+ 0.41}$ $^{+0.41}_{-0.46}$	4.13 $_{- 0.12}^{+ 0.12}$ $^{+0.12}_{-0.12}$
		upstream	4680	149.5 (56.3)	224.0 (84.3)	4.01 $_{- 0.21}^{+ 0.19}$ $^{+0.19}_{-0.21}$ (3.63 $_{- 0.18}^{+ 0.16}$ $^{+0.16}_{-0.18}$ )	2.42 $_{- 0.13}^{+ 0.12}$ $^{+0.12}_{-0.13}$	2.06 $_{- 0.04}^{+ 0.04}$ $^{+0.04}_{-0.04}$

East	627.2/573 (1.09)	downstream	1131	94.5 (35.4)	139.4 (52.2)	7.74 $_{- 1.15}^{+ 1.63}$ $^{+1.63}_{-1.15}$ (7.10 $_{- 0.82}^{+ 0.92}$ $^{+0.92}_{-0.82}$ )	5.67 $_{- 0.90}^{+ 1.23}$ $^{+1.23}_{-0.90}$	2.49 $_{- 0.14}^{+ 0.14}$ $^{+0.14}_{-0.14}$
		upstream	1780	139.4 (52.2)	208.3 (78.0)	5.72 $_{- 0.94}^{+ 1.33}$ $^{+1.33}_{-0.94}$ (6.15 $_{- 0.79}^{+ 1.13}$ $^{+1.13}_{-0.79}$ )	2.40 $_{- 0.43}^{+ 0.47}$ $^{+0.47}_{-0.43}$	1.43 $_{- 0.04}^{+ 0.04}$ $^{+0.04}_{-0.04}$

West	511.9/475 (1.08)	downstream	955	83.3 (31.2)	120.2 (45.0)	6.84 $_{- 1.73}^{+ 2.70}$ $^{+2.70}_{-1.73}$ (5.58 $_{- 0.84}^{+ 1.12}$ $^{+1.12}_{-0.84}$ )	5.05 $_{- 1.29}^{+ 2.00}$ $^{+2.00}_{-1.29}$	2.51 $_{- 0.08}^{+ 0.08}$ $^{+0.08}_{-0.08}$
		upstream	1391	120.2 (45.0)	192.2 (72.0)	4.14 $_{- 0.87}^{+ 1.06}$ $^{+1.06}_{-0.87}$ (4.08 $_{- 0.51}^{+ 0.59}$ $^{+0.59}_{-0.51}$ )	1.46 $_{- 0.33}^{+ 0.40}$ $^{+0.40}_{-0.33}$	1.20 $_{- 0.09}^{+ 0.10}$ $^{+0.10}_{-0.09}$

Notes. (1) Name of the edge; (2) C-stat/D.o.f.; (3) side of the edge; (4) Number of net counts; (5-6) inner and outer radius of the wedge. Note that the center of the inner wedges is the center of Hercules A, while the centers of the east and west outer wedges is the center of the associated radio lobe; (7) deprojected temperature (projected temperature inside brackets); (8) deprojected pressure; (8) deprojected electron density.

^a The inner and outer radii are relative to the minor axis of the elliptical wedges with ellipticity 1.75 and position angle 10° shown in Fig. A.1.

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