hyperion.model.helpers

hyperion.model.helpers.run_with_vertical_hseq(prefix, model, n_iter=10, mpi=False, n_processes=4, overwrite=False)

Run a model with vertical hydrostatic equilibrium.

Note

this is an experimental function that is currently in development. Please use with care!

The hydrostatic equilibrium condition is only applied to the disk components. The following requirements must be met:

• The model should be an AnalyticalYSOModel
• The model should be defined on a cylindrical polar grid
• The stellar mass should be set
• The model should include at least one disk

The dust properties for the model can be specified as dust or dust+gas densities as this does not have an impact on this calculation - however, the hydrostatic equilibrium is computed assuming an H2 + He mix of gas (i.e. mu=2.279). Note that this calculation also ignores the effects of self-gravity in the disk, which might be important for more massive disks.

Parameters:

prefix : str

The prefix for the output

model : ~hyperion.model.analytical_yso_model.AnalyticalYSOModel

The model to run

n_iter : int, optional

The number of iterations to run the model for

mpi : bool, optional

Whether to run the model in parallel

n_processes : int, optional

The number of processes to use if mpi is True

overwrite : bool, optional

Whether to overwrite previous files

hyperion.model.helpers.tau_to_radius(model, tau, wav)

Given a Model instance with a spherical polar coordinate grid, find the radius from which the optical depth to escape radially is a fixed value.

This only works for spherical polar grids, but works for 1-, 2-, and 3-d grids.

Parameters:

model : ~hyperion.model.Model instance

tau : float

The optical depth for which to find the surface

wav : float

The wavelength at which the optical depth is defined

Returns:

r : np.ndarray

The radius or radii at which the optical depth to escape radially is tau at wav. This is a scalar, a 1-d, or a 2-d array depending on the dimensionality of the grid.