Could you please let me know, if there is any software/code/tool for simulating/calculating the result of a short EMW pulse (waveform is exactly known) propagating in the ISM for long distance, including effects of especially the dispersion, scattering, etc?

  • $\begingroup$ There are plenty, but they're all dedicated to a particular part of the spectrum / particular physical processes. It will be easier to guide you if you could write more specifically what your purpose is, e.g. are you interested in how starlight is absorbed/scattered by gas and/or dust, how UV ionizes the neutral gas, how Lyman alpha scatters its way through the ISM, etc? Are you interested in idealized model galaxies, hydrodynamically simulated galaxies, or just molecular clouds? $\endgroup$ – pela Sep 8 at 20:49
  • $\begingroup$ @pela Thank you very much. Simply, if a short EM pulse (planar wave, pulse duration is ms level, time-domain waveform is known, freq band is e.g. MHz to 10MHz, or higher) propagates from somewhere in the Milky way (within disk) to the Earth, through the ISM, I hope to calculate/obtain the concrete waveform of this EM wave when it arrives at the Earth, considering some dominating effects such as dispersion, scattering, absorbing caused by the ISM. I understand that the actual situation would be complicated, but once the algorithm covers the major contribution it will be good enough. Thank you. $\endgroup$ – Wein Sep 11 at 14:43
  • $\begingroup$ I'm sorry, radiative transfer in the radio regime is far from my expertise, so I don't think I can be of any help. There's a code called ASTRORAY that does RT of (polarized) radio/sub-mm near black holes that you may be able to modify to your needs? $\endgroup$ – pela Sep 15 at 9:49
  • $\begingroup$ @pela Thank you very much. I will try the ASTRORAY. $\endgroup$ – Wein Sep 15 at 18:41

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