Planck intermediate results. XX. Comparison of polarized thermal emission from Galactic dust with simulations of MHD turbulence
et al.
| Autores: | , , , , , , , , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/140094 |
| Acesso em linha: | http://hdl.handle.net/10261/140094 |
| Access Level: | acceso abierto |
| Palavra-chave: | Dust, extinction ISM: general ISM: magnetic fields ISM: clouds Infrared: ISM Submillimeter: ISM |
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oai:digital.csic.es:10261/140094 |
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España |
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Planck intermediate results. XX. Comparison of polarized thermal emission from Galactic dust with simulations of MHD turbulenceAde, P. A. R.Barreiro, R. BelénCurto, AndrésDiego, José MaríaGonzález-Nuevo, J.López-Caniego, M.Martínez-González, EnriqueToffolatti, LuigiVielva, PatricioRebolo López, RafaelLevrier, F.Planck CollaborationDust, extinctionISM: generalISM: magnetic fieldsISM: cloudsInfrared: ISMSubmillimeter: ISMet al.Polarized emission observed by Planck HFI at 353 GHz towards a sample of nearby fields is presented, focusing on the statistics of polarization fractions p and angles ψ. The polarization fractions and column densities in these nearby fields are representative of the range of values obtained over the whole sky. We find that: (i) the largest polarization fractions are reached in the most diffuse fields; (ii) the maximum polarization fraction pmax decreases with column density NH in the more opaque fields with NH> 1021 cm-2; and (iii) the polarization fraction along a given line of sight is correlated with the local spatial coherence of the polarization angle. These observations are compared to polarized emission maps computed in simulations of anisotropic magnetohydrodynamical turbulence in which we assume a uniform intrinsic polarization fraction of the dust grains. We find that an estimate of this parameter may be recovered from the maximum polarization fraction pmax in diffuse regions where the magnetic field is ordered on large scales and perpendicular to the line of sight. This emphasizes the impact of anisotropies of the magnetic field on the emerging polarization signal. The decrease of the maximum polarization fraction with column density in nearby molecular clouds is well reproduced in the simulations, indicating that it is essentially due to the turbulent structure of the magnetic field: an accumulation of variously polarized structures along the line of sight leads to such an anti-correlation. In the simulations, polarization fractions are also found to anti-correlate with the angle dispersion function . However, the dispersion of the polarization angle for a given polarization fraction is found to be larger in the simulations than in the observations, suggesting a shortcoming in the physical content of these numerical models. In summary, we find that the turbulent structure of the magnetic field is able to reproduce the main statistical properties of the dust polarization as observed in a variety of nearby clouds, dense cores excluded, and that the large-scale field orientation with respect to the line of sight plays a major role in the quantitative analysis of these statistical properties.The development of Planck has been supported by: ESA; CNES and CNRS/INSU-IN2P3-INP (France); ASI, CNR, and INAF (Italy); NASA and DoE (USA); STFC and UKSA (UK); CSIC, MICINN, JA and RES (Spain); Tekes, AoF and CSC (Finland); DLR and MPG (Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland); RCN (Norway); SFI (Ireland); FCT/MCTES (Portugal); and PRACE (EU). The research leading to these results has received funding from the European Research Council under the European Union’s Seventh Framework Programme (FP7/2007-2013) / ERC grant agreement No. 267934.Peer ReviewedEDP SciencesConsejo Superior de Investigaciones Científicas (España)European Research CouncilJunta de AndalucíaEuropean CommissionMinisterio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2016201620152016info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/140094reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/FP7/267934http://dx.doi.org/10.1051/0004-6361/201424086Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1400942026-05-22T06:33:51Z |
| dc.title.none.fl_str_mv |
Planck intermediate results. XX. Comparison of polarized thermal emission from Galactic dust with simulations of MHD turbulence |
| title |
Planck intermediate results. XX. Comparison of polarized thermal emission from Galactic dust with simulations of MHD turbulence |
| spellingShingle |
Planck intermediate results. XX. Comparison of polarized thermal emission from Galactic dust with simulations of MHD turbulence Ade, P. A. R. Dust, extinction ISM: general ISM: magnetic fields ISM: clouds Infrared: ISM Submillimeter: ISM |
| title_short |
Planck intermediate results. XX. Comparison of polarized thermal emission from Galactic dust with simulations of MHD turbulence |
| title_full |
Planck intermediate results. XX. Comparison of polarized thermal emission from Galactic dust with simulations of MHD turbulence |
| title_fullStr |
Planck intermediate results. XX. Comparison of polarized thermal emission from Galactic dust with simulations of MHD turbulence |
| title_full_unstemmed |
Planck intermediate results. XX. Comparison of polarized thermal emission from Galactic dust with simulations of MHD turbulence |
| title_sort |
Planck intermediate results. XX. Comparison of polarized thermal emission from Galactic dust with simulations of MHD turbulence |
| dc.creator.none.fl_str_mv |
Ade, P. A. R. Barreiro, R. Belén Curto, Andrés Diego, José María González-Nuevo, J. López-Caniego, M. Martínez-González, Enrique Toffolatti, Luigi Vielva, Patricio Rebolo López, Rafael Levrier, F. Planck Collaboration |
| author |
Ade, P. A. R. |
| author_facet |
Ade, P. A. R. Barreiro, R. Belén Curto, Andrés Diego, José María González-Nuevo, J. López-Caniego, M. Martínez-González, Enrique Toffolatti, Luigi Vielva, Patricio Rebolo López, Rafael Levrier, F. Planck Collaboration |
| author_role |
author |
| author2 |
Barreiro, R. Belén Curto, Andrés Diego, José María González-Nuevo, J. López-Caniego, M. Martínez-González, Enrique Toffolatti, Luigi Vielva, Patricio Rebolo López, Rafael Levrier, F. Planck Collaboration |
| author2_role |
author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Consejo Superior de Investigaciones Científicas (España) European Research Council Junta de Andalucía European Commission Ministerio de Ciencia e Innovación (España) Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Dust, extinction ISM: general ISM: magnetic fields ISM: clouds Infrared: ISM Submillimeter: ISM |
| topic |
Dust, extinction ISM: general ISM: magnetic fields ISM: clouds Infrared: ISM Submillimeter: ISM |
| description |
et al. |
| publishDate |
2015 |
| dc.date.none.fl_str_mv |
2015 2016 2016 2016 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/140094 |
| url |
http://hdl.handle.net/10261/140094 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7/267934 http://dx.doi.org/10.1051/0004-6361/201424086 Sí |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess |
| eu_rights_str_mv |
openAccess |
| dc.publisher.none.fl_str_mv |
EDP Sciences |
| publisher.none.fl_str_mv |
EDP Sciences |
| dc.source.none.fl_str_mv |
reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
| instname_str |
Consejo Superior de Investigaciones Científicas (CSIC) |
| reponame_str |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
| collection |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
| repository.name.fl_str_mv |
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| repository.mail.fl_str_mv |
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1869412003848650752 |
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15,812429 |