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A Unified Model for the Fan Region and the North Polar Spur: A bundle of filaments in the Local Galaxy
J. L. West, T. L. Landecker, B. M. Gaensler +2
We present a simple, unified model that can explain two of the brightest, large-scale, diffuse, polarized radio features in the sky, the North Polar Spur (NPS) and the Fan Region,…
The correct sense of Faraday rotation
K. Ferrière, J. L. West, T. R. Jaffe
The phenomenon of Faraday rotation of linearly polarized synchrotron emission in a magneto-ionized medium has been understood and studied for decades. But since the sense of the ro…
Helicity in the Large-Scale Galactic Magnetic Field
J. L. West, R. N. Henriksen, K. Ferrière +4
We search for observational signatures of magnetic helicity in data from all-sky radio polarization surveys of the Milky Way Galaxy. Such a detection would help confirm the dynamo…
A more detailed look at Galactic magnetic field models: using free-free absorption in HII regions
I. M. Polderman, M. Haverkorn, T. R. Jaffe
The observed interaction product of Cosmic Rays (CRs) and Galactic magnetic fields (GMF) is the Galactic synchrotron emission integrated over the line-of-sight (LOS). The GMF stren…
Practical Modeling of Large-Scale Galactic Magnetic Fields: Status and Prospects
Tess R. Jaffe
This is a review of the status of efforts to model the large-scale Galactic magnetic field (GMF). Though important for a variety of astrophysical processes, the GMF remains poorly…
IMAGINE: modeling the Galactic magnetic field
Marijke Haverkorn, François Boulanger, Torsten Enßlin +5
The IMAGINE Consortium aims to bring modeling of the magnetic field of the Milky Way to a next level, by using Bayesian inference. IMAGINE includes an open-source modular software…
Low frequency measurements of synchrotron absorbing HII regions and modeling of observed synchrotron emissivity
I. M. Polderman, M. Haverkorn, T. R. Jaffe +1
Cosmic rays (CRs) and magnetic fields are dynamically important components in the Galaxy, and their energy densities are comparable to that of the turbulent interstellar gas. The i…
IMAGINE: A comprehensive view of the interstellar medium, Galactic magnetic fields and cosmic rays
Francois Boulanger, Torsten Ensslin, Andrew Fletcher +20
In this white paper we introduce the IMAGINE Consortium and its scientific background, goals and structure. Our purpose is to coordinate and facilitate the efforts of a diverse gro…
Cygnus Loop: A double bubble?
J. West, S. Safi-Harb, I. Reichardt +4
The Cygnus Loop is a well-studied supernova remnant (SNR) that has been observed across the electromagnetic spectrum. Although widely believed to be an SNR shell with a blow- out r…
Planck intermediate results. XLV. Radio spectra of northern extragalactic radio sources
Planck Collaboration, P. A. R. Ade, N. Aghanim +202
Continuum spectra covering centimetre to submillimetre wavelengths are presented for a northern sample of 104 extragalactic radio sources, mainly active galactic nuclei, based on f…
Planck intermediate results. XLII. Large-scale Galactic magnetic fields
Planck Collaboration, R. Adam, P. A. R. Ade +175
Recent models for the large-scale Galactic magnetic fields in the literature have been largely constrained by synchrotron emission and Faraday rotation measures. We use three diffe…
The Connection between Supernova Remnants and the Galactic Magnetic Field: A Global Radio Study of the Axisymmetric Sample
J. L. West, S. Safi-Harb, T. Jaffe +3
The study of supernova remnants (SNRs) is fundamental to understanding the chemical enrichment and magnetism in galaxies, including our own Milky Way. In an effort to understand th…
Multi-wavelength constraints on cosmic-ray leptons in the Galaxy
E. Orlando, A. W. Strong, I. V. Moskalenko +7
Cosmic rays (CRs) interact with the gas, the radiation field and the magnetic field in the Milky Way, producing diffuse emission from radio to gamma rays. Observations of this diff…
Planck 2015 results. XXV. Diffuse low-frequency Galactic foregrounds
Planck Collaboration, P. A. R. Ade, N. Aghanim +238
(abridged) We discuss the Galactic foreground emission between 20 and 100GHz based on observations by Planck/WMAP. The Commander component-separation tool has been used to separate…
Planck intermediate results. XXXVIII. E- and B-modes of dust polarization from the magnetized filamentary structure of the interstellar medium
Planck Collaboration, P. A. R. Ade, N. Aghanim +192
The quest for a B-mode imprint from primordial gravity waves on the polarization of the cosmic microwave background (CMB) requires the characterization of foreground polarization f…
Planck intermediate results. XXVII. High-redshift infrared galaxy overdensity candidates and lensed sources discovered by Planck and confirmed by Herschel-SPIRE
Planck Collaboration, N. Aghanim, B. Altieri +183
[Abridged] We use the Planck all-sky submm and mm maps to search for rare sources distinguished by extreme brightness, a few hundreds of mJy, and their potential for being situated…
Planck 2015 results. XXVIII. The Planck Catalogue of Galactic Cold Clumps
Planck Collaboration, P. A. R. Ade, N. Aghanim +220
We present the Planck Catalogue of Galactic Cold Clumps (PGCC), an all-sky catalogue of Galactic cold clump candidates detected by Planck. This catalogue is the full version of the…
Planck intermediate results. XXXV. Probing the role of the magnetic field in the formation of structure in molecular clouds
Planck Collaboration, P. A. R. Ade, N. Aghanim +195
Within ten nearby (d < 450 pc) Gould Belt molecular clouds we evaluate statistically the relative orientation between the magnetic field projected on the plane of sky, inferred fro…
SKA studies of in-situ synchrotron radiation from molecular clouds
Clive Dickinson, R. Beck, R. Crocker +16
Observations of the properties of dense molecular clouds are critical in understanding the process of star-formation. One of the most important, but least understood, is the role o…
Planck intermediate results. XXXIV. The magnetic field structure in the Rosette Nebula
Planck Collaboration, N. Aghanim, M. I. R. Alves +197
Planck has mapped the polarized dust emission over the whole sky, making it possible to trace the Galactic magnetic field structure that pervades the interstellar medium (ISM). We…
Planck intermediate results. XXXII. The relative orientation between the magnetic field and structures traced by interstellar dust
Planck Collaboration, R. Adam, P. A. R. Ade +199
The role of the magnetic field in the formation of the filamentary structures observed in the interstellar medium (ISM) is a debated topic. The Planck all-sky maps of linearly pola…
Planck intermediate results. XXXI. Microwave survey of Galactic supernova remnants
Planck Collaboration, M. Arnaud, M. Ashdown +160
The all-sky Planck survey in 9 frequency bands was used to search for emission from all 274 known Galactic supernova remnants. Of these, 16 were detected in at least two Planck fre…
Planck intermediate results. XXV. The Andromeda Galaxy as seen by Planck
Planck Collaboration, P. A. R. Ade, N. Aghanim +202
The Andromeda Galaxy (M31) is one of a few galaxies that has sufficient angular size on the sky to be resolved by the Planck satellite. Planck has detected M31 in all of its freque…
Planck intermediate results. XIX. An overview of the polarized thermal emission from Galactic dust
Planck Collaboration, P. A. R. Ade, N. Aghanim +199
This paper presents the large-scale polarized sky as seen by Planck HFI at 353 GHz, which is the most sensitive Planck channel for dust polarization. We construct and analyse large…