Astrodust+PAH Cross Sections

Absorption, scattering and extinction cross sections for astrodust, ionized PAHs/graphite ("cion"), and neutral PAHs/graphite ("cneu"). Astrodust file includes polarization cross sections. The astrodust data correspond to grains that are 1.4:1 oblate spheroids with porosity = 0.2<br> <br> Please cite <a href="https://arxiv.org/abs/2208.12365">Hensley & Draine 2022</a> if using these data. Please also consider citing the paper where the astrodust dielectric function was derived (<a href="https://ui.adsabs.harvard.edu/abs/2021ApJ...909...94D/abstract">Draine & Hensley 2021</a>) and the paper deriving the observational constraints used to calibrate the model (<a href="https://ui.adsabs.harvard.edu/abs/2021ApJ...906...73H/abstract">Hensley & Draine 2021</a>). <br> <br> The astrodust files are organized as follows: <br> HDU 0: Information on file structure <br> HDU 1: Effective radius values (167) <br> HDU 2: Wavelength values (1000) <br> HDU 3: Log<sub>10</sub> U values (91) <br> HDU 4: C<sub>abs</sub> (167x1000, cm<sup>2</sup>) <br> HDU 5: C<sub>sca</sub> (167x1000, cm<sup>2</sup>) <br> HDU 6: C<sub>ext</sub> (167x1000, cm<sup>2</sup>) <br> HDU 7: C<sub>abs, pol</sub> (167x1000, cm<sup>2</sup>) <br> HDU 8: C<sub>ext, pol</sub> (167x1000, cm<sup>2</sup>) <br> HDU 9: ∫ dT dP/dt C<sub>abs</sub> ν B<sub>ν</sub>(T) (167x91x1000, erg/s/sr) <br> HDU 10: ∫ dT dP/dt C<sub>abs, pol</sub> ν B<sub>ν</sub>(T) (167x91x1000, erg/s/sr) <br> <br> The files for PAHs/graphite ("c"arbonaceous grains) are organized as follows: <br> HDU 0: Information on file structure <br> HDU 1: Effective radius values (167) <br> HDU 2: Wavelength values (1000) <br> HDU 3: Log<sub>10</sub> U values (91) <br> HDU 4: C<sub>abs</sub> (167x1000, cm<sup>2</sup>) <br> HDU 5: C<sub>sca</sub> (167x1000, cm<sup>2</sup>) <br> HDU 6: C<sub>ext</sub> (167x1000, cm<sup>2</sup>) <br> HDU 7: ∫ dT dP/dt C<sub>abs</sub> ν B<sub>ν</sub>(T) (167x91x1000, erg/s/sr) <br> <br> A Jupyter notebook illustrating use of these files is available on <a href="https://github.com/brandonshensley/Astrodust/tree/main/notebooks">Github</a> ("changing_size_distribution_tutorial.ipynb"). <br> <br> Finally, we also provide all data as plaintext files in the zipped directory.