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IMAGINE: a comprehensive view of the interstellar medium, Galactic magnetic fields and cosmic rays
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Number of Authors: 232018 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, no 8, article id 049Article in journal (Refereed) Published
Abstract [en]

In this white paper we introduce the IMAGINE Consortium and its scientific background, goals and structure. The purpose of the consortium is to coordinate and facilitate the efforts of a diverse group of researchers in the broad areas of the interstellar medium, Galactic magnetic fields and cosmic rays, and our overarching goal is to develop more comprehensive insights into the structures and roles of interstellar magnetic fields and their interactions with cosmic rays within the context of Galactic astrophysics. The ongoing rapid development of observational and numerical facilities and techniques has resulted in a widely felt need to advance this subject to a qualitatively higher level of self-consistency, depth and rigour. This can only be achieved by the coordinated efforts of experts in diverse areas of astrophysics involved in observational, theoretical and numerical work. We present our view of the present status of this research area, identify its key unsolved problems and suggest a strategy that will underpin our work. The backbone of the consortium is the Interstellar MAGnetic field INference Engine, a publicly available Bayesian platform that employs robust statistical methods to explore the multi-dimensional likelihood space using any number of modular inputs. This tool will be used by the IMAGINE Consortium to develop an interpretation and modelling framework that provides the method, power and flexibility to interfuse information from a variety of observational, theoretical and numerical lines of evidence into a self-consistent and comprehensive picture of the thermal and non-thermal interstellar media. An important innovation is that a consistent understanding of the phenomena that are directly or indirectly influenced by the Galactic magnetic field, such as the deflection of ultra-high energy cosmic rays or extragalactic backgrounds, is made an integral part of the modelling. The IMAGINE Consortium, which is informal by nature and open to new participants, hereby presents a methodological framework for the modelling and understanding of Galactic magnetic fields that is available to all communities whose research relies on a state of the art solution to this problem.

Place, publisher, year, edition, pages
2018. no 8, article id 049
Keywords [en]
galactic magnetic fields, cosmic magnetic fields theory, ultra high energy cosmic rays, Magnetohydrodynamics
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-160144DOI: 10.1088/1475-7516/2018/08/049ISI: 000443329400002OAI: oai:DiVA.org:su-160144DiVA, id: diva2:1248890
Available from: 2018-09-17 Created: 2018-09-17 Last updated: 2019-12-12Bibliographically approved

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Jasche, Jens
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Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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