A dynamically young, gravitationally stable network of filaments in Orion B

Open Access

Table B.1

Topography of a two-dimensional dataset depending on the eigenvalues of its Hessian matrix ε₁ and ε₂.

ε₁	ε₂	Structure
L	L	No preferred direction
L	H−	Ridge
L	H+	Valley
H−	H−	Peak (local maximum)
H−	H+	Pass (saddle point)
H+	H+	Hole (local minimum)

Notes. The parameter L indicates a low value; H− and H+ indicate a highly negative (respectively positive) value.

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