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Interstellar emission model and tool

This work presents ongoing efforts in the development of the Interstellar Emission Model (IEM) and its associated tools, as conducted by a collaboration of researchers from Garching, Bochum, and Santa Cruz. We highlight the creation of ISRF and gas cubes, including HI and HII inversion methodologies, and discuss challenges related to cosmic ray (CR) propagation and matter coupling. Additionally, we outline our radiation process reviews using DPMJET and GEANT4, and present initial tests with EGRET data to assess our emission model's performance. Future workshops aim to further refine this model.

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Interstellar emission model and tool

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  1. Interstellar emission model and tool Seth Digel, Jay Norris, Eduardo do Couto e Silva, Y. Lin, Massimo Fiorucci, Tune Kamae, Stan Hunter, Olaf Reimer, Mutsumi Sugizaki, Isabelle Grenier

  2. Interstellar emission model • ISRF cube: • work in progress in Garching & Bochum/Santa Cruz • Gas cube: • HI inversion at GSFC • HII surveys available • H2 inversion… further down • M(CO-g) vs M(IR-g) problems ahead • Radiation processes: • p-p, p-n, p-He, p-C interactions, resonances: DPMJET v3 (Bochum), GEANT4 • Review of cross sections vs. data (SLAC, Italy) • Brem with He etc… • CR propagation: • GALPROP at Garching, prop. model at Bochum • Nearby sources and propagation: Bochum & Saclay • CR/matter coupling at GSFC

  3. IS emission model • Tests • On standard EGRET data • On ‘cleaned up’ EGRET data • ISM Workshop • Next year in Paris • People support ( 12) • Garching, Bochum, Saclay, HEPL, Goddard, Italy?, SLAC

  4. Interstellar emission tool A8 • Input = • IS emission cube + E band + region • + Gmult + Gbias (within limits for choice of E and region) • Output = • space-energy array with differential intensities • Tessellation • IS emission cube probably in inertial Gal. Ref. Frame and (l,b) • gridding scheme to be tested with simulated data • Gridding decision: when? how? • (x,y,z), (l,b), (a,d) to final grid module to be called by many other modules

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