Line_transfer Parameters

Line_transfer

The way in which line transfer and scattering is dealt with in the code. Governs whether we adopt any approximations for radiative transfer, whether to use the indivisible packet and macro-atom machinery, and whether to use isotropic or anisotropic scattering.

Thermal trapping mode is recommended for non-macro atom runs, while thermal trapping macro-atom mode is recommended for macro-atom runs.

Type

Enumerator

Values

• pure_abs: Pure absorption

  The pure absortion approximation.

• pure_scat: Pure scattering

  The pure scattering approximation.

• sing_scat: Single scattering

  The single scattering approximation.

• escape_prob: Escape probability

  Resonance scattering and electron scattering is dealt with isotropically. free-free, compton and bound-free opacities attenuate the weight of the photon wind emission produces additional photons, which have their directions chosen isotropically. The amount of radiation produced is attenuated by the escape probability.

• thermal_trapping: Escape probability + anisotropic scattering

  We use the 'thermal trapping method' to choose an anistropic direction when an r-packet deactivation or scatter occurs.

• macro_atoms: Macro-atoms

  use macro-atom line transfer. Packets are indivisible and thus all opacities are dealt with by activate a macro-atom, scattering, or creating a k-packet. the new direction following electron scattering or deactivation of a macro atom is chosen isotropically.

• macro_atoms_thermal_trapping: Macro-atoms + anisotropic scattering

  as macro_atoms, but we use the 'thermal trapping method' to choose an anistropic direction when an r-packet deactivation or scatter occurs.

File: setup_line_transfer.c