Discontinuous Galerkin finite element method for the continuum radiative transfer problem inside axis-symmetric circumstellar envelopes

Open Access

Fig. 2

Representation of the direction vector Ω at the equator. The dotted arrows represent the symmetric of Ω with respect to the equatorial plane $(\hat{r}, \hat{Φ})$ $\[(\hat{r}, \hat{\Phi})\]$ . The left and right 2D views allow the corresponding direction angles to be seen.

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