Draine et al. (2003) Milky-Way dust

These dust properties are for the carbonaceous-silicate grain model developed by Bruce Draine and collaborators. The three dust models are those for the Milky Way size distribution for Rv=3.1, 4.0, and 5.5, and the abundances and grain size distribution are taken from Weingartner and Draine (2001).

Note

The dust properties given here are given per unit mass of dust, and do not include the gas mass. This means that when using Hyperion, the dust densities should be specified, not the total densities.

The Rv=3.1, 4.0, and 5.5 models are those with b_c=60ppm, 40ppm, and 30ppm respectively. The renormalization of the dust-to-gas ratio mentioned in Draine (2003) is not important here, since we give the dust properties per unit dust mass.

The dust properties presented here were recomputed with the code described in Computing dust properties, and may differ slightly from those given by Bruce Draine (we had to recompute them in order to obtain the full scattering properties which were otherwise not available).

The dust files are available in the hyperion-dust directory as dust_files/d03_3.1_6.0_A.hdf5, dust_files/d03_4.0_4.0_A.hdf5, and dust_files/d03_5.5_3.0_A.hdf5 (once you have run python setup.py build_dust), where the first number indicates the Rv, and the second indicates b_c.

Milky-Way dust, Rv=3.1, b_c=6.0 (dust_files/d03_3.1_6.0_A.hdf5)

The following plot gives an overview of the dust properties (as described in Preparing dust properties):

Milky-Way dust, Rv=4.0, b_c=4.0 (dust_files/d03_4.0_4.0_A.hdf5)

The following plot gives an overview of the dust properties (as described in Preparing dust properties):

Milky-Way dust, Rv=5.5, b_c=3.0 (dust_files/d03_5.5_3.0_A.hdf5)

The following plot gives an overview of the dust properties (as described in Preparing dust properties):