Dust grain properties

There are several plots that show the effective grain properties of the used dustgrains. In all plots, it is possible to transform the particles and data to the observed data that was used.

General properties

To plot the extinction coefficients, albedo, scattering phase function and emission of the used dustgrains (default is astro-silicates) in function of the grain size, use command

dgplot_dustgrains

(Source code, png, hires.png, pdf)

../_images/dustgrain_props-1.png

To see other dustgrains, use

dgplot_dustgrains -c <possible>

To transform the particles to the observed data grids and see the data of the dustgrains for the observed dustmodel, use

dgplot_dustgrains --obsdata obsdata

To see the options for saving the plots (for this and future plots), use

dgplot_dustgrains --help

Effective size

To plot the average dustgrain size in function of wavelength for both extinction and emission, use

dgplot_effsize

(Source code, png, hires.png, pdf)

../_images/dustgrain_props-2.png

Single grain properties

Another plot that is available is one that shows the single grain properties. It is devided into four subplots. The first one shows the extinction for a chosen wavelength and composition in function of grain size. The second one shows the same thing but for the emission. The third and fourth subplot show the relative absorpiton and scattering coefficient for a chosen wavelength in function of grain size. To make this plot, use

dgplot_singlegrain_props

(Source code, png, hires.png, pdf)

../_images/dustgrain_props-3.png

The default wavelength for these plots is 0.1 micron. To choose another wavelength (with the wavelength given in micron), use

dgplot_singlegrain_props --wave wavelength

To see other dustgrains (<possible> = astro-silicates, astro-carbonaceous, astro-graphite, astro-PAH-ionized and astro-PAH-neutral), use

dgplot_singlegrain_props -c <possible>

To transform the particles to the observed data grids and see the data of the dustgrains for the observed dustmodel, use

dgplot_singlegrain_props --obsdata obsdata

R(V)

The last available plotting options shows the extinction-R(V) relation for all different grain sizes and a chosen wavelength and composition. To make this plot, use

dgplot_rv

(Source code, png, hires.png, pdf)

../_images/dustgrain_props-4.png

The default wavelength for these plots is 0.1 micron. To choose another wavelength (with the wavelength given in micron), use

dgplot_rv --wave wavelength

To see other dustgrains (<possible> = astro-silicates, astro-carbonaceous, astro-graphite, astro-PAH-ionized and astro-PAH-neutral), use

dgplot_rv -c <possible>

To transform the particles to the observed data grids and see the data of the dustgrains for the observed dustmodel, use

dgplot_rv --obsdata obsdata