Thermal emission from bow shocks - III. Variable diffuse X-ray emission from stellar-wind bow shocks driven by dynamical instabilities

Open Access

Table 1

Simulations run for the study of bow shock properties.

Sim	Dim.	Eqn.	Sol.	Resolution	B₀ (µG)
`2D-1-hd8`	2D	HD	8	128 × 64	[0,0,0]
`2D-1-hd9`	2D	HD	9	128 × 64	[0,0,0]
`2D-1-bx8`	2D	MHD	8	128 × 64	[4,0,0]
`2D-1-bx7`	2D	MHD	7	128 × 64	[4,0,0]
`3D-1-hd8`	3D	HD	8	128³	[0,0,0]
`3D-1-hd9`	3D	HD	9	128³	[0,0,0]
`3D-1-bx8`	3D	MHD	8	128³	[4,0,0]
`3D-1-bx7`	3D	MHD	7	128³	[4,0,0]
`3D-1-by7`	3D	MHD	7	128³	[1,4,0]

`2D-2-hd8`	2D	HD	8	256 × 128	[0,0,0]
`2D-2-hd9`	2D	HD	9	256 × 128	[0,0,0]
`2D-2-bx8`	2D	MHD	8	256 × 128	[4,0,0]
`2D-2-bx7`	2D	MHD	7	256 × 128	[4,0,0]
`3D-2-hd8`	3D	HD	8	256³	[0,0,0]
`3D-2-hd9`	3D	HD	9	256³	[0,0,0]
`3D-2-bx8`	3D	MHD	8	256³	[4,0,0]
`3D-2-bx7`	3D	MHD	7	256³	[4,0,0]
`3D-2-by7`	3D	MHD	7	256³	[1,4,0]

`2D-3-hd8`	2D	HD	8	384 × 192	[0,0,0]
`2D-3-hd9`	2D	HD	9	384 × 192	[0,0,0]
`2D-3-bx8`	2D	MHD	8	384 × 192	[4,0,0]
`2D-3-bx7`	2D	MHD	7	384 × 192	[4,0,0]
`3D-3-bx7`	3D	MHD	7	384³	[4,0,0]
`3D-3-by7`	3D	MHD	7	384³	[1,4,0]

`2D-4-hd8`	2D	HD	8	512 × 256	[0,0,0]
`2D-4-hd9`	2D	HD	9	512 × 256	[0,0,0]
`2D-4-bx8`	2D	MHD	8	512 × 256	[4,0,0]
`2D-4-bx7`	2D	MHD	7	512 × 256	[4,0,0]

`2D-5-hd8`	2D	HD	8	1024 × 512	[0,0,0]
`2D-5-hd9`	2D	HD	9	1024 × 512	[0,0,0]
`2D-5-bx8`	2D	MHD	8	1024 × 512	[4,0,0]
`2D-5-bx7`	2D	MHD	7	1024 × 512	[4,0,0]

Notes. All simulations use the same stellar wind parameters and ISM density; only the dimensionality, equations, solver, magnetic-field orientation and resolution are varied. The simulations have 3 levels of refinement, focussed on the apex of the bow shock. Columns are, respectively, (1) simulation id, (2) dimensionality, (3) equations solved, (4) Riemann solver, (5) spatial resolution per level, and (6) ISM magnetic field orientation, where in 2D the vector components refer to [z, R, θ] and in 3D to [x, y, z]. Solver numbers correspond to: 7 = HLLD/HLL hybrid MHD solver, 8 = HLL solver (HD and MHD), 9 = hybrid Roe/HLL HD solver (see Section 2.2).

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