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 :doc:`bhmie`, 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 :doc:`../setup/setup_dust`): .. image:: d03_3.1_6.0_A.png :width: 800px :align: center 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 :doc:`../setup/setup_dust`): .. image:: d03_4.0_4.0_A.png :width: 800px :align: center 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 :doc:`../setup/setup_dust`): .. image:: d03_5.5_3.0_A.png :width: 800px :align: center .. _Draine (2003): http://adsabs.harvard.edu/abs/2003ARA%26A..41..241D .. _Bruce Draine: http://www.astro.princeton.edu/~draine/dust/dustmix.html .. _Weingartner and Draine (2001): http://adsabs.harvard.edu/abs/2001ApJ...548..296W