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July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

A Radiation Transfer Model for the UV-submm Radiation Fields in the Milky Way: Application to High Energy Astrophysics

Jul 31, 2015, 11:00 AM
15m
Amazon (World Forum)

Amazon

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution GA-TH Parallel GA06 TH

Speaker

Dr Richard Tuffs (Max-Planck-Institut fuer Kernphysik)

Description

We present a solution for the interstellar radiation fields (ISRF) in the Milky Way from UV to submm wavelengths based on axisymmetric radiation transfer modelling of the panchromatic SED of the galaxy in direct and dust-reradiated starlight as constrained by all-sky imaging by the IRAS, COBE and Planck satellites. This is the first self-consistent model of the spatial and spectral distribution of radiation fields that predicts all available observations, including the submm imaging from Planck. For canonical electron energy spectra we predict the relative levels and hardness of inverse compton (IC) emission from the ISRF and cosmic microwave background as a function of position in the galaxy. The ISRF component is found to become important within the solar circle not only for high energy IC emission from the diffuse interstellar medium, but also for very high energy IC emission from sources of cosmic ray electrons, notwithstanding the diminution of the ISRF component through the Klein-Nishina effect. We also predict the variation over the sky in visibility of very high energy gamma-ray sources within and external to the galaxy due to pair production in the mid-IR component of the ISRF.
Collaboration -- not specified --
Registration number following "ICRC2015-I/" 973

Primary author

Dr Richard Tuffs (Max-Planck-Institut fuer Kernphysik)

Co-authors

Dr Cristina Popescu (University of Central Lancashire) Prof. Felix Aharonian (Max-Planck-Institut fuer Kernphysik) Dr Giovanni Natale (University of Central Lancashire) Dr Ruizhi Yang (Max-Planck-Institut fuer Kernphysik)

Presentation materials

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