TY - JOUR
T1 - IMAGINE
T2 - A comprehensive view of the interstellar medium, Galactic magnetic fields and cosmic rays
AU - Boulanger, François
AU - Enßlin, Torsten
AU - Fletcher, Andrew
AU - Girichides, Philipp
AU - Hackstein, Stefan
AU - Haverkorn, Marijke
AU - Hörandel, Jörg R.
AU - Jaffe, Tess
AU - Jasche, Jens
AU - Kachelrieß, Michael
AU - Kotera, Kumiko
AU - Pfrommer, Christoph
AU - Rachen, Jörg P.
AU - Rodrigues, Luiz F.S.
AU - Ruiz-Granados, Beatriz
AU - Seta, Amit
AU - Shukurov, Anvar
AU - Sigl, Günter
AU - Steininger, Theo
AU - Vacca, Valentina
AU - Velden, Ellert Van Der
AU - Vliet, Arjen Van
AU - Wang, Jiaxin
N1 - Funding Information:
We thank the International Space Science Institute in Bern, Switzerland, and the Lorentz Center in Leiden, the Netherlands, for the hospitality and financial support that has led to the founding of the IMAGINE Consortium. We thank Sebastian Hutschenreuter for providing figure 11, and Franco Vazza for providing figure 10 based on simulations done with the ENZO code16 [299]. TE and TS acknowledge partly support by the DFG Cluster of Excellence
Funding Information:
“Origin and Structure of the Universe” and by the DFG Research Unit 1254 “Magnetisation of Interstellar and Intergalactic Media — The Prospects of Low-Frequency Radio Observations”. AF, LFSR and AS thank STFC (ST/N00900/1) and The Leverhulme Trust (RPG-2014-427) for funding. PG and CP acknowledge support by the European Research Council under ERC-CoG grant CRAGSMAN-646955. BR-G acknowledges support from the European Union’s Horizon 2020 project RADIOFOREGROUNDS under grant agreement number 687312. GS is supported by the DFG through collaborative research centre SFB 676 “Particles, Strings and the Early Universe” and by the Bundesministerium für Bildung und Forschung (BMBF) through grant 05 A17GU1. TS was supported by the Studienstiftung des deutschen Volkes. AvV acknowledges financial support from the NWO astroparticle physics grant WARP.
Publisher Copyright:
© 2018 IOP Publishing Ltd and Sissa Medialab.
PY - 2018/8/31
Y1 - 2018/8/31
N2 - 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.
AB - 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.
KW - cosmic magnetic fields theory
KW - galactic magnetic fields
KW - Magnetohydrodynamics
KW - ultra high energy cosmic rays
UR - http://www.scopus.com/inward/record.url?scp=85053126851&partnerID=8YFLogxK
U2 - 10.1088/1475-7516/2018/08/049
DO - 10.1088/1475-7516/2018/08/049
M3 - Article
AN - SCOPUS:85053126851
SN - 1475-7516
VL - 2018
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
IS - 8
M1 - 049
ER -