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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Planck intermediate results: XVII. Emission of dust in the diffuse interstellar medium from the far-infrared to microwave frequencies
Astronomy and Astrophysics, Volume 566, Article A55, Year 2014
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Description
The dust-Hi correlation is used to characterize the emission properties of dust in the diffuse interstellar medium (ISM) from far infrared wavelengths to microwave frequencies. The field of this investigation encompasses the part of the southern sky best suited to study the cosmic infrared and microwave backgrounds. We cross-correlate sky maps from Planck, the Wilkinson Microwave Anisotropy Probe (WMAP), and the diffuse infrared background experiment (DIRBE), at 17 frequencies from 23 to 3000 GHz, with the Parkes survey of the 21 cm line emission of neutral atomic hydrogen, over a contiguous area of 7500 deg2 centred on the southern Galactic pole. We present a general methodology to study the dust-H i correlation over the sky, including simulations to quantify uncertainties. Our analysis yields four specific results. (1) We map the temperature, submillimetre emissivity, and opacity of the dust per H-atom. The dust temperature is observed to be anti-correlated with the dust emissivity and opacity. We interpret this result as evidence of dust evolution within the diffuse ISM. The mean dust opacity is measured to be (7.1 ± 0.6) × 10-27 cm2 H-1 × (v/353 GHz) 1.53 ± 0.03for 100 ≤ v ≤ 353 GHz. This is a reference value to estimate hydrogen column densities from dust emission at submillimetre and millimetre wavelengths. (2) We map the spectral index βmm of dust emission at millimetre wavelengths (defined here as v ≤ 353GHz), and find it to be remarkably constant at βmm = 1.51 ± 0.13. We compare it with the far infrared spectral index βFIR derived from greybody fits at higher frequencies, and find a systematic difference, βmm -βFIR = -0.15, which suggests that the dust spectral energy distribution (SED) flattens at v ≤ 353 GHz. (3) We present spectral fits of the microwave emission correlated with Hi from 23 to 353 GHz, which separate dust and anomalous microwave emission (AME). We show that the flattening of the dust SED can be accounted for with an additional component with a blackbody spectrum. This additional component, which accounts for (26 ± 6)% of the dust emission at 100GHz, could represent magnetic dipole emission. Alternatively, it could account for an increasing contribution of carbon dust, or a flattening of the emissivity of amorphous silicates, at millimetre wavelengths. These interpretations make different predictions for the dust polarization SED. (4) We analyse the residuals of the dust-Hi correlation. We identify a Galactic contribution to these residuals, which we model with variations of the dust emissivity on angular scales smaller than that of our correlation analysis. This model of the residuals is used to quantify uncertainties of the CIB power spectrum in a companion Planck paper.© ESO 2014.
Authors & Co-Authors
Abergel, Alain
France, Orsay
Institut D'astrophysique Spatiale
Ade, Peter A.R.
United Kingdom, Cardiff
Cardiff University
Aghanim, Nabila
France, Orsay
Institut D'astrophysique Spatiale
Alves, Marta I.R.
France, Orsay
Institut D'astrophysique Spatiale
Aniano, Gonzalo
France, Orsay
Institut D'astrophysique Spatiale
Arnaud, Monique D.
France, Gif-sur-yvette
Institut de Recherche Sur Les Lois Fondamentales de L'univers
Ashdown, Mark A.J.
United Kingdom, Cambridge
Department of Physics
United Kingdom, Cambridge
University of Cambridge
Aumont, Jonathan
France, Orsay
Institut D'astrophysique Spatiale
Baccigalupi, Carlo
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
Banday, Anthony J.
France, Toulouse
Institut de Recherche en Astrophysique et Planétologie Irap
France, Toulouse
Observatoire Midi-pyrénées
Barreiro, R. B.
Spain, Santander
Universidad de Cantabria
Bartlett, James G.
France, Paris
Apc - Astroparticule et Cosmologie
United States, Pasadena
Jet Propulsion Laboratory
Battaner, Eduardo
Spain, Granada
Universidad de Granada, Facultad de Ciencias
Benabed, Karim
France, Paris
Institut D’astrophysique de Paris
France, Paris
Sorbonne Université
Benoit-Lévy, Aurélien
United Kingdom, London
University College London
France, Paris
Institut D’astrophysique de Paris
France, Paris
Sorbonne Université
Bernard, Jean Ph
France, Toulouse
Institut de Recherche en Astrophysique et Planétologie Irap
France, Toulouse
Observatoire Midi-pyrénées
Bersanelli, Marco
Italy, Milan
Università Degli Studi Di Milano
Italy, Milan
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Milan
Bielewicz, Pawel
France, Toulouse
Institut de Recherche en Astrophysique et Planétologie Irap
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
France, Toulouse
Observatoire Midi-pyrénées
Bobin, Jérôme
France, Gif-sur-yvette
Institut de Recherche Sur Les Lois Fondamentales de L'univers
Bonaldi, Anna
United Kingdom, Manchester
The University of Manchester
Bond, J. Richard
Canada, Toronto
L’institut Canadien D’astrophysique Théorique
Bouchet, François R.
France, Paris
Institut D’astrophysique de Paris
France, Paris
Sorbonne Université
Boulanger, Franc¸ois
France, Orsay
Institut D'astrophysique Spatiale
Burigana, Carlo
Italy, Ferrara
University of Ferrara
Italy, Bologna
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Bologna
Cardoso, Jean Fraņcois
France, Paris
Apc - Astroparticule et Cosmologie
France, Paris
Institut D’astrophysique de Paris
France, Palaiseau
Laboratoire Traitement et Communication de L'information
Catalano, Andrea
France, Neuville-sur-oise
Lerma - Laboratoire D'études du Rayonnement et de la Matière en Astrophysique et Atmosphères
France, Grenoble
Laboratoire de Physique Subatomique et de Cosmologie de Grenoble
Chamballu, A.
France, Gif-sur-yvette
Cea Saclay
France, Orsay
Institut D'astrophysique Spatiale
France, Gif-sur-yvette
Institut de Recherche Sur Les Lois Fondamentales de L'univers
Chiang, H. Cynthia
South Africa, Durban
University of Kwazulu-natal
United States, Princeton
Princeton University
Christensen, Per Rex
Denmark, Copenhagen
Niels Bohr Institutet
Clements, David L.
United Kingdom, London
Imperial College London
Colombi, Stéphane T.
France, Paris
Institut D’astrophysique de Paris
France, Paris
Sorbonne Université
Colombo, Loris P.L.
United States, Los Angeles
University of Southern California
United States, Pasadena
Jet Propulsion Laboratory
Couchot, Franҫois
France, Orsay
Laboratoire de L'accélérateur Linéaire
Crill, Brendan P.
United States, Pasadena
Jet Propulsion Laboratory
United States, Pasadena
California Institute of Technology
Cuttaia, Francesco
Italy, Bologna
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Bologna
Danese, Luigi
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
Davis, Richard J.
United Kingdom, Manchester
The University of Manchester
De Bernardis, Paolo
Italy, Rome
Dipartimento Di Fisica
de Rosa, Adriano
Italy, Bologna
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Bologna
de Zotti, Gianfranco
Italy, Padua
Osservatorio Astronomico Di Padova
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
Delabrouille, Jacques
France, Paris
Apc - Astroparticule et Cosmologie
Désert, François Xavier
France, Saint Martin D'heres
Institut de Planétologie et D’astrophysique de Grenoble Ipag
Dickinson, Clive
United Kingdom, Manchester
The University of Manchester
Diego, J. M.
Spain, Santander
Universidad de Cantabria
Dole, Hervé A.
France, Paris
Institut Universitaire de France
France, Orsay
Institut D'astrophysique Spatiale
Donzelli, Simona
Italy, Milan
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Milan
Doré, Olivier P.
United States, Pasadena
California Institute of Technology
United States, Pasadena
Jet Propulsion Laboratory
Douspis, Marian
France, Orsay
Institut D'astrophysique Spatiale
Dupac, Xavier
Spain, Madrid
European Space Astronomy Centre
Efstathiou, George P.
United Kingdom, Cambridge
Institute of Astronomy
Ensslin, Torsten A.
Germany, Garching Bei Munchen
Max Planck Institute for Astrophysics
Eriksen, Hans Kristian K.
Norway, Oslo
Universitetet I Oslo
Falgarone, Edith G.
France, Neuville-sur-oise
Lerma - Laboratoire D'études du Rayonnement et de la Matière en Astrophysique et Atmosphères
Finelli, Fabio
Italy, Bologna
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Bologna
Italy, Bologna
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bologna
Forni, Olivier P.
France, Toulouse
Institut de Recherche en Astrophysique et Planétologie Irap
France, Toulouse
Observatoire Midi-pyrénées
Frailis, Marco
Italy, Trieste
Osservatorio Astronomico Di Trieste
Franceschi, Enrico
Italy, Bologna
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Bologna
Galeotta, Samuele
Italy, Trieste
Osservatorio Astronomico Di Trieste
Ganga, Ken M.
France, Paris
Apc - Astroparticule et Cosmologie
Ghosh, Tuhin
France, Orsay
Institut D'astrophysique Spatiale
Giard, Martin
France, Toulouse
Institut de Recherche en Astrophysique et Planétologie Irap
France, Toulouse
Observatoire Midi-pyrénées
Giraud-Héraud, Yannick
France, Paris
Apc - Astroparticule et Cosmologie
Gonzalez-Nuevo, J.
Spain, Santander
Universidad de Cantabria
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
Görski, Krzysztof M.
United States, Pasadena
Jet Propulsion Laboratory
Poland, Warsaw
University of Warsaw
Gregorio, Anna
Italy, Trieste
Università Degli Studi Di Trieste
Italy, Trieste
Osservatorio Astronomico Di Trieste
Gruppuso, Alessandro
Italy, Bologna
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Bologna
Guillet, Vincent
France, Orsay
Institut D'astrophysique Spatiale
Hansen, Frode K.
Norway, Oslo
Universitetet I Oslo
Harrison, D. L.
United Kingdom, Cambridge
Institute of Astronomy
United Kingdom, Cambridge
University of Cambridge
Helou, George X.
United States, Pasadena
California Institute of Technology
Henrot-Versillé, Sophie
France, Orsay
Laboratoire de L'accélérateur Linéaire
Hërnàndez-Monteagudo, Carlos
Spain, Teruel
Centro de Estudios de Física Del Cosmos de Aragón Cefca
Germany, Garching Bei Munchen
Max Planck Institute for Astrophysics
Herranz, Diego
Spain, Santander
Universidad de Cantabria
Hildebrandt, Sergi R.
United States, Pasadena
California Institute of Technology
Hivon, Eric F.
France, Paris
Institut D’astrophysique de Paris
France, Paris
Sorbonne Université
Hobson, Michael Paul
United Kingdom, Cambridge
Department of Physics
Holmes, Warren A.
United States, Pasadena
Jet Propulsion Laboratory
Hornstrup, Allan
Denmark, Lyngby
Technical University of Denmark
Hovest, Wolfgang
Germany, Garching Bei Munchen
Max Planck Institute for Astrophysics
Huffenberger, Kevin M.
United States, Tallahassee
Florida State University
Jaffe, Andrew H H.
United Kingdom, London
Imperial College London
Jaffe, Tess R.
France, Toulouse
Institut de Recherche en Astrophysique et Planétologie Irap
France, Toulouse
Observatoire Midi-pyrénées
Joncas, Gilles
Canada, Quebec
Université Laval
Jones, Anthony P.
France, Orsay
Institut D'astrophysique Spatiale
Jones, William C.
United States, Princeton
Princeton University
Juvela, Mika J.
Finland, Helsinki
Helsingin Yliopisto
Kalberla, Peter M.W.
Germany, Bonn
Universität Bonn
Keihänen, Elina
Finland, Helsinki
Helsingin Yliopisto
Kerp, Juergen
Germany, Bonn
Universität Bonn
Keskitalo, Reijo
United States, Berkeley
Lawrence Berkeley National Laboratory
United States, Berkeley
Department of Electrical Engineering and Computer Sciences
Kisner, Theodore S.
United States, Berkeley
Lawrence Berkeley National Laboratory
Kneissl, Ruediger
Chile, Santiago
Atacama Large Millimeter-submillimeter Array
Chile, Santiago
European Southern Observatory Santiago
Knoche, Jörg
Germany, Garching Bei Munchen
Max Planck Institute for Astrophysics
Kunz, Martin
South Africa, Muizenberg
African Institute for Mathematical Sciences
Switzerland, Geneva
Université de Genève
France, Orsay
Institut D'astrophysique Spatiale
Kurki-Suonio, Hannu
Finland, Helsinki
Helsingin Yliopisto
Lagache, Guilaine
France, Orsay
Institut D'astrophysique Spatiale
L¨ahteenm¨aki, Anne A.
Finland, Espoo
Aalto University
Finland, Helsinki
Helsingin Yliopisto
Lamarre, Jean Michel A.
France, Neuville-sur-oise
Lerma - Laboratoire D'études du Rayonnement et de la Matière en Astrophysique et Atmosphères
Lasenby, Anthony N.
United Kingdom, Cambridge
Department of Physics
United Kingdom, Cambridge
University of Cambridge
Lawrence, Charles R.
United States, Pasadena
Jet Propulsion Laboratory
Statistics
Citations: 100
Authors: 100
Affiliations: 57
Identifiers
Doi:
10.1051/0004-6361/201323270
ISSN:
00046361
e-ISSN:
14320746
Research Areas
Environmental
Study Design
Cross Sectional Study
Study Approach
Quantitative