Imperial College London

Professor Andrew H Jaffe

Faculty of Natural SciencesDepartment of Physics

Professor of Astrophysics and Cosmology



+44 (0)20 7594 7526a.jaffe Website




Miss Louise Hayward +44 (0)20 7594 7679




1018BBlackett LaboratorySouth Kensington Campus






BibTex format

author = {Adam, R and Ade, PAR and Aghanim, N and Alves, MIR and Arnaud, M and Arzoumanian, D and Ashdown, M and Aumont, J and Baccigalupi, C and Banday, AJ and Barreiro, RB and Bartolo, N and Battaner, E and Benabed, K and Benoit-Lévy, A and Bernard, JP and Bersanelli, M and Bielewicz, P and Bonaldi, A and Bonavera, L and Bond, JR and Borrill, J and Bouchet, FR and Boulanger, F and Bracco, A and Burigana, C and Butler, RC and Calabrese, E and Cardoso, JF and Catalano, A and Chamballu, A and Chiang, HC and Christensen, PR and Colombi, S and Colombo, LPL and Combet, C and Couchot, F and Crill, BP and Curto, A and Cuttaia, F and Danese, L and Davies, RD and Davis, RJ and De, Bernardis P and De, Rosa A and De, Zotti G and Delabrouille, J and Dickinson, C and Diego, JM and Dole, H and Donzelli, S and Doré, O and Douspis, M and Ducout, A and Dupac, X and Efstathiou, G and Elsner, F and Enßlin, TA and Eriksen, HK and Falgarone, E and Ferrière, K and Finelli, F and Forni, O and Frailis, M and Fraisse, },
journal = {Astronomy and Astrophysics},
pages = {1--25},
title = {Planck intermediate results. XXXII. The relative orientation between the magnetic field and structures traced by interstellar dust},
volume = {586},
year = {2016}

RIS format (EndNote, RefMan)

AB - The role of the magnetic field in the formation of the filamentary structures observed in the interstellar medium (ISM) is a debated topic owing to the paucity of relevant observations needed to test existing models. The Planck all-sky maps of linearly polarized emission from dust at 353 GHz provide the required combination of imaging and statistics to study the correlation between the structures of the Galactic magnetic field and of interstellar matter over the whole sky, both in the diffuse ISM and in molecular clouds. The data reveal that structures, or ridges, in the intensity map have counterparts in the Stokes Q and/or U maps. We focus our study on structures at intermediate and high Galactic latitudes, which cover two orders of magnitude in column density, from 1020 to 1022 cm2. We measure the magnetic field orientation on the plane of the sky from the polarization data, and present an algorithm to estimate the orientation of the ridges from the dust intensity map. We use analytical models to account for projection effects. Comparing polarization angles on and o the structures, we estimate the mean ratio between the strengths of the turbulent and mean components of the magnetic field to be between 0.6 and 1.0, with a preferred value of 0.8. We find that the ridges are usually aligned with the magnetic field measured on the structures. This statistical trend becomes more striking for increasing polarization fraction and decreasing column density. There is no alignment for the highest column density ridges. We interpret the increase in alignment with polarization fraction as a consequence of projection effects. We present maps to show that the decrease in alignment for high column density is not due to a loss of correlation between the distribution of matter and the geometry of the magnetic field. In molecular complexes, we also observe structures perpendicular to the magnetic field, which, statistically, cannot be accounted for by projection effects. This firs
AU - Adam,R
AU - Ade,PAR
AU - Aghanim,N
AU - Alves,MIR
AU - Arnaud,M
AU - Arzoumanian,D
AU - Ashdown,M
AU - Aumont,J
AU - Baccigalupi,C
AU - Banday,AJ
AU - Barreiro,RB
AU - Bartolo,N
AU - Battaner,E
AU - Benabed,K
AU - Benoit-Lévy,A
AU - Bernard,JP
AU - Bersanelli,M
AU - Bielewicz,P
AU - Bonaldi,A
AU - Bonavera,L
AU - Bond,JR
AU - Borrill,J
AU - Bouchet,FR
AU - Boulanger,F
AU - Bracco,A
AU - Burigana,C
AU - Butler,RC
AU - Calabrese,E
AU - Cardoso,JF
AU - Catalano,A
AU - Chamballu,A
AU - Chiang,HC
AU - Christensen,PR
AU - Colombi,S
AU - Colombo,LPL
AU - Combet,C
AU - Couchot,F
AU - Crill,BP
AU - Curto,A
AU - Cuttaia,F
AU - Danese,L
AU - Davies,RD
AU - Davis,RJ
AU - De,Bernardis P
AU - De,Rosa A
AU - De,Zotti G
AU - Delabrouille,J
AU - Dickinson,C
AU - Diego,JM
AU - Dole,H
AU - Donzelli,S
AU - Doré,O
AU - Douspis,M
AU - Ducout,A
AU - Dupac,X
AU - Efstathiou,G
AU - Elsner,F
AU - Enßlin,TA
AU - Eriksen,HK
AU - Falgarone,E
AU - Ferrière,K
AU - Finelli,F
AU - Forni,O
AU - Frailis,M
AU - Fraisse,AA
AU - Franceschi,E
AU - Frejsel,A
EP - 25
PY - 2016///
SN - 0004-6361
SP - 1
TI - Planck intermediate results. XXXII. The relative orientation between the magnetic field and structures traced by interstellar dust
T2 - Astronomy and Astrophysics
VL - 586
ER -