دورية أكاديمية
Planck 2018 results: XII. Galactic astrophysics using polarized dust emission
| العنوان: | Planck 2018 results: XII. Galactic astrophysics using polarized dust emission |
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| المؤلفون: | Aghanim, N., Akrami, Y., Alves, Mir, Ashdown, M., Aumont, J., Baccigalupi, C., Ballardini, M., Banday, A. J., Barreiro, R. B., Bartolo, N., Basak, S., Benabed, K., Bernard, J. -p., Bersanelli, M., Bielewicz, P., Bock, J. J., Bond, J. R., Borrill, J., Bouchet, F. R., Boulanger, F., Bracco, A., Bucher, M., Burigana, C., Calabrese, E., Cardoso, J. -f., Carron, J., Chary, R. -r., Chiang, H. C., Colombo, L. P. L., Combet, C., Crill, B. P., Cuttaia, F., De Bernardis, P., De Zotti, G., Delabrouille, J., Delouis, Jean Marc, Di Valentino, E., Dickinson, C., Diego, J. M., Dore, O., Douspis, M., Ducout, A., Dupac, X., Efstathiou, G., Elsner, F., Ensslin, T. A., Eriksen, H. K., Falgarone, E., Fantaye, Y., Fernandez-cobos, R., Ferriere, K., Finelli, F., Forastieri, F., Frailis, M., Fraisse, A. A., Franceschi, E., Frolov, A., Galeotta, S., Galli, S., Ganga, K., Genova-santos, R. T., Gerbino, M., Ghosh, T., Gonzalez-nuevo, J., Gorski, K. M., Gratton, S., Green, G., Gruppuso, A., Gudmundsson, J. E., Guillet, V., Handley, W., Hansen, F. K., Helou, G., Herranz, D., Hivon, E., Huang, Z., Jaffe, A. H., Jones, W. C., Keihanen, E., Keskitalo, R., Kiiveri, K., Kim, J., Krachmalnicoff, N., Kunz, M., Kurki-suonio, H., Lagache, G., Lamarre, J. -m., Lasenby, A., Lattanzi, M., Lawrence, C. R., Le Jeune, M., Levrier, F., Liguori, M., Lilje, P. B., Lindholm, V., Lopez-caniego, M., Lubin, Pm, Ma, Y. -z., Macias-perez, J. F., Maggio, G., Maino, D., Mandolesi, N., Mangilli, A., Marcos-caballero, A., Maris, M., Martin, Pg, Martinez-gonzalez, E., Matarrese, S., Mauri, N., Mcewen, J. D., Melchiorri, A., Mennella, A., Migliaccio, M., Miville-deschenes, M. -a., Molinari, D., Moneti, A., Montier, L., Morgante, G., Moss, A., Natoli, P., Pagano, L., Paoletti, D., Patanchon, G., Perrotta, F., Pettorino, V., Piacentini, F., Polastri, L., Polenta, G., Puget, J. -l., Rachen, J. P., Reinecke, M., Remazeilles, M., Renzi, A., Ristorcelli, I., Rocha, G., Rosset, C., Roudier, G., Rubino-martin, J. A., Ruiz-granados, B., Salvati, L., Sandri, M., Savelainen, M., Scott, D., Sirignano, C., Sunyaev, R., Suur-uski, A. -s., Tauber, J. A., Tavagnacco, D., Tenti, M., Toffolatti, L., Tomasi, M., Trombetti, T., Valiviita, J., Vansyngel, F., Van Tent, B., Vielva, P., Villa, F., Vittorio, N., Wandelt, B. D., Wehus, I. K., Zacchei, A., Zonca, A. |
| المصدر: | Astronomy & Astrophysics (0004-6361) (Edp Sciences S A), 2020-09 , Vol. 641 , N. A12 , P. 43p. |
| بيانات النشر: | Edp Sciences S A |
| سنة النشر: | 2020 |
| المجموعة: | Ifremer (French Research Institute for Exploitation of the Sea): Archimer |
| مصطلحات موضوعية: | polarization, magnetic fields, turbulence, dust, extinction, local insterstellar matter, submillimeter: ISM |
| الوصف: | Observations of the submillimetre emission from Galactic dust, in both total intensity I and polarization, have received tremendous interest thanks to the Planck full-sky maps. In this paper we make use of such full-sky maps of dust polarized emission produced from the third public release of Planck data. As the basis for expanding on astrophysical studies of the polarized thermal emission from Galactic dust, we present full-sky maps of the dust polarization fraction p, polarization angle psi, and dispersion function of polarization angles ?. The joint distribution (one-point statistics) of p and N-H confirms that the mean and maximum polarization fractions decrease with increasing N-H. The uncertainty on the maximum observed polarization fraction, (max) = 22.0(-1.4)(+3.5) p max = 22 . 0 - 1.4 + 3.5 % at 353 GHz and 80 ' resolution, is dominated by the uncertainty on the Galactic emission zero level in total intensity, in particular towards diffuse lines of sight at high Galactic latitudes. Furthermore, the inverse behaviour between p and ? found earlier is seen to be present at high latitudes. This follows the ?proportional to p(-1) relationship expected from models of the polarized sky (including numerical simulations of magnetohydrodynamical turbulence) that include effects from only the topology of the turbulent magnetic field, but otherwise have uniform alignment and dust properties. Thus, the statistical properties of p, psi, and ? for the most part reflect the structure of the Galactic magnetic field. Nevertheless, we search for potential signatures of varying grain alignment and dust properties. First, we analyse the product map ?xp, looking for residual trends. While the polarization fraction p decreases by a factor of 3-4 between N-H=10(20) cm(-2) and N-H=2x10(22) cm(-2), out of the Galactic plane, this product ?xp only decreases by about 25%. Because ? is independent of the grain alignment efficiency, this demonstrates that the systematic decrease in p with N-H is determined mostly by the ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://archimer.ifremer.fr/doc/00654/76632/77786.pdfTest; https://archimer.ifremer.fr/doc/00654/76632Test/ |
| DOI: | 10.1051/0004-6361/201833885 |
| الإتاحة: | https://doi.org/10.1051/0004-6361/201833885Test https://archimer.ifremer.fr/doc/00654/76632/77786.pdfTest https://archimer.ifremer.fr/doc/00654/76632Test/ |
| حقوق: | info:eu-repo/semantics/openAccess ; restricted use |
| رقم الانضمام: | edsbas.214A5DF3 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1051/0004-6361/201833885 |
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