Evidence for a shock-compressed magnetic field in the northwestern rim of Vela Jr. from X-ray polarimetry

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Volume 692 (December 2024)

A&A, 692 (2024) A59

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Table 5.

Best-fit spectro-polarimetric parameters of the source region from Vela Jr.

Component	Parameter (unit)	Value

Constant	Factor DU1	1.000 (frozen)
	Factor DU2	$0 . 997_{- 0.023}^{+ 0.024}$ $0.997_{-0.023}^{+0.024}$
	Factor DU3	$1 . 012_{- 0.023}^{+ 0.023}$ $1.012_{-0.023}^{+0.023}$
TBabs	N_H (10²² cm⁻²)	0.400 (frozen)
polconst	A	$0 . 175_{- 0.047}^{+ 0.047}$ $0.175_{-0.047}^{+0.047}$
polconst	ψ (deg)	$- 34 . 5_{- 7.9}^{+ 7.9}$ $-34.5_{-7.9}^{+7.9}$ $(145 . 5_{- 7.9}^{+ 7.9})$ $(145.5_{-7.9}^{+7.9})$
powerlaw	Γ	$2 . 41_{- 0.06}^{+ 0.06}$ $2.41_{-0.06}^{+0.06}$

Notes. The hydrogen column density, N_H, is fixed to the value obtained from the Chandra observation. Parameter A denotes PD, and ψ represents PA. The reduced chi-square value is $χ^{2} / d.o.f. = 70.57 / 112$ $\chi ^2/\text{ d.o.f.} = 70.57/112$ . All values are quoted at a 68.3% confidence level.

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