Planck intermediate results XXXVIII. E- and B-modes of dust polarization from the magnetized filamentary structure of the interstellar medium

P. A. R. Ade; N. Aghanim; M. Arnaud; M. Ashdown; J. Aumont; C. Baccigalupi; A. J. Banday; R. B. Barreiro; N. Bartolo; E. Battaner; K. Benabed; A. Benoit-Levy; J-P Bernard; M. Bersanelli; P. Bielewicz; A. Bonaldi; L. Bonavera; J. R. Bond; J. Borrill; F. R. Bouchet; F. Boulanger; A. Bracco; C. Burigana; J-F Cardoso; A. Catalano; A. Chamballu; R-R Chary; H. C. Chiang; P. R. Christensen; L. P. L. Colombo; C. Combet; B. P. Cri; A. Curto; F. Cuttaia; L. Danese; R. D. Davies; R. J. Davis; P. De Bernardis; A. de Rosa; Giulia De Zotti; J. Delabrouille; J-M Delouis; C. Dickinson; J. M. Diego; H. Dole; S. Donzelli; O. Dore; M. Douspis; J. Dunkley; X. Dupac; G. Efstathiou; F. Elsner; T. A. Ensslin; H. K. Eriksen; E. Falgarone; K. Ferriere; F. Finelli; O. Forni; M. Frailis; A. A. Fraisse; E. Franceschi; A. Frolov; S. Galeotta; S. Galli; K. Ganga; T. Ghosh; M. Giard; E. Gjerlow; J. Gonzalez-Nuevo; K. M. Gorski; A. Gruppuso; V. Guillet; F. K. Hansen; D. L. Harrison; G. Helou; C. Hernandez-Monteagudo; D. Herranz; S. R. Hildebrandt; E. Hivon; Allan Hornstrup; W. Hovest; Z. Huang; K. M. Huffenberger; G. Hurier; T. R. Jaffe; W. C. Jones; M. Juvela; E. Keihaenen; R. Kesldtalo; T. S. Kisner; R. Kneiss'; J. Knoche; M. Kunz; H. Kurld-Suonio; J-M Lamarre; A. Lasenby; M. Lattanzi; C. R. Lawrence; R. Leonardi; J. Leon-Tavares; E. Levrier; M. Liguori; P. B. Lilje; Michael Linden-Vørnle; M. Lopez-Caniego; P. M. Lubin; J. F. Macias-Perez; B. Maffei; D. Maino; N. Mandolesi; M. Maris; P. G. Martin; E. Martinez-Gonzalez; S. Masi; S. Maialtese; P. McGehee; A. Melchiorri; A. Mennella; M. Migliaccio; M-A Miville-Deschenes; A. Moneti; L. Montier; G. Morgante; D. Mortlock; D. Munshi; J. A. Murphy; P. Naselsky; F. Nati; P. Natoli; D. Novikov; I. Novikov; N. Oppermann; Carol Anne Oxborrow; L. Pagano; Fernand Pajot; D. Paoletti; F. Pasian; O. Perdereau; V. Pettorino; F. Piacentini; M. Piat; E. Pierpaoli; S. Plaszczynski; E. Pointecouteau; G. Polenta; N. Ponthieu; G. W. Pratt; S. Prunet; J-L Puget; J. P. Rachen; W. T. Reach; R. Rebolo; M. Reinecke; M. Remazeilles; C. Renault; A. Renzi; I. Ristorcelli; G. Rocha; C. Rosset; M. Rossetti; G. Roudier; J. A. Rubino-Martin; B. Rusholme; M. Sandri; D. Santos; M. Savelainen; G. Savini; D. Scott; P. Serra; J. D. Soler; V. Stolyarov; R. Sudiwala; R. Sunyaev; A-S Suur-Uski; J-F Sygnet; J. A. Tauber; L. Terenzi; L. Toffolatti; M. Tomasi; M. Tristram; M. Tucci; G. Umana; L. Valenziano; J. Valiviita; B. Van Tent; P. Vielva; F. Villa; L. A. Wade; B. D. Wandelt; I. K. Wehus; D. Yvon; A. Zacchei; A. Zonca

doi:10.1051/0004-6361/201526506

Planck intermediate results XXXVIII. E- and B-modes of dust polarization from the magnetized filamentary structure of the interstellar medium

P. A. R. Ade, N. Aghanim, M. Arnaud, M. Ashdown, J. Aumont, C. Baccigalupi, A. J. Banday, R. B. Barreiro, N. Bartolo, E. Battaner, K. Benabed, A. Benoit-Levy, J-P Bernard, M. Bersanelli, P. Bielewicz, A. Bonaldi, L. Bonavera, J. R. Bond, J. Borrill, F. R. BouchetF. Boulanger, A. Bracco, C. Burigana, J-F Cardoso, A. Catalano, A. Chamballu, R-R Chary, H. C. Chiang, P. R. Christensen, L. P. L. Colombo, C. Combet, B. P. Cri, A. Curto, F. Cuttaia, L. Danese, R. D. Davies, R. J. Davis, P. De Bernardis, A. de Rosa, Giulia De Zotti, J. Delabrouille, J-M Delouis, C. Dickinson, J. M. Diego, H. Dole, S. Donzelli, O. Dore, M. Douspis, J. Dunkley, X. Dupac, G. Efstathiou, F. Elsner, T. A. Ensslin, H. K. Eriksen, E. Falgarone, K. Ferriere, F. Finelli, O. Forni, M. Frailis, A. A. Fraisse, E. Franceschi, A. Frolov, S. Galeotta, S. Galli, K. Ganga, T. Ghosh, M. Giard, E. Gjerlow, J. Gonzalez-Nuevo, K. M. Gorski, A. Gruppuso, V. Guillet, F. K. Hansen, D. L. Harrison, G. Helou, C. Hernandez-Monteagudo, D. Herranz, S. R. Hildebrandt, E. Hivon, Allan Hornstrup, W. Hovest, Z. Huang, K. M. Huffenberger, G. Hurier, T. R. Jaffe, W. C. Jones, M. Juvela, E. Keihaenen, R. Kesldtalo, T. S. Kisner, R. Kneiss', J. Knoche, M. Kunz, H. Kurld-Suonio, J-M Lamarre, A. Lasenby, M. Lattanzi, C. R. Lawrence, R. Leonardi, J. Leon-Tavares, E. Levrier, M. Liguori, P. B. Lilje, Michael Linden-Vørnle, M. Lopez-Caniego, P. M. Lubin, J. F. Macias-Perez, B. Maffei, D. Maino, N. Mandolesi, M. Maris, P. G. Martin, E. Martinez-Gonzalez, S. Masi, S. Maialtese, P. McGehee, A. Melchiorri, A. Mennella, M. Migliaccio, M-A Miville-Deschenes, A. Moneti, L. Montier, G. Morgante, D. Mortlock, D. Munshi, J. A. Murphy, P. Naselsky, F. Nati, P. Natoli, D. Novikov, I. Novikov, N. Oppermann, Carol Anne Oxborrow, L. Pagano, Fernand Pajot, D. Paoletti, F. Pasian, O. Perdereau, V. Pettorino, F. Piacentini, M. Piat, E. Pierpaoli, S. Plaszczynski, E. Pointecouteau, G. Polenta, N. Ponthieu, G. W. Pratt, S. Prunet, J-L Puget, J. P. Rachen, W. T. Reach, R. Rebolo, M. Reinecke, M. Remazeilles, C. Renault, A. Renzi, I. Ristorcelli, G. Rocha, C. Rosset, M. Rossetti, G. Roudier, J. A. Rubino-Martin, B. Rusholme, M. Sandri, D. Santos, M. Savelainen, G. Savini, D. Scott, P. Serra, J. D. Soler, V. Stolyarov, R. Sudiwala, R. Sunyaev, A-S Suur-Uski, J-F Sygnet, J. A. Tauber, L. Terenzi, L. Toffolatti, M. Tomasi, M. Tristram, M. Tucci, G. Umana, L. Valenziano, J. Valiviita, B. Van Tent, P. Vielva, F. Villa, L. A. Wade, B. D. Wandelt, I. K. Wehus, D. Yvon, A. Zacchei, A. Zonca

University of Copenhagen

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Abstract

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 from Galactic dust. We present a statistical study of the filamentary structure of the 353 GHz Planck Stokes maps at high Galactic latitude, relevant to the study of dust emission as a polarized foreground to the CMB. We filter the intensity and polarization maps to isolate filaments in the range of angular scales where the power asymmetry between E-modes and B-modes is observed. Using the Smoothed Hessian Major Axis Filament Finder (SMAFF), we identify 259 filaments at high Galactic latitude, with lengths larger or equal to 2 degrees (corresponding to 3.5 pc in length for a typical distance of 100 pc). These filaments show a preferred orientation parallel to the magnetic field projected onto the plane of the sky, derived from their polarization angles. We present mean maps of the filaments in Stokes I, Q, U, E, and B, computed by stacking individual images rotated to align the orientations of the filaments. Combining the stacked images and the histogram of relative orientations, we estimate the mean polarization fraction of the filaments to be 11%. Furthermore, we show that the correlation between the filaments and the magnetic field orientations may account for the E and B asymmetry and the C-l(TE)/C-l(EE) ratio, reported in the power spectra analysis of the Planck 353 GHz polarization maps. Future models of the dust foreground for CMB polarization studies will need to take into account the observed correlation between the dust polarization and the structure of interstellar matter.

Original language	English
Article number	A141
Journal	Astronomy and Astrophysics
Volume	586
Number of pages	18
ISSN	0004-6361
DOIs	https://doi.org/10.1051/0004-6361/201526506
Publication status	Published - 2016

Keywords

Polarization
ISM: general
Galaxy: ISM
Submillimeter: ISM

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10.1051/0004-6361/201526506

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Ade, P. A. R., Aghanim, N., Arnaud, M., Ashdown, M., Aumont, J., Baccigalupi, C., Banday, A. J., Barreiro, R. B., Bartolo, N., Battaner, E., Benabed, K., Benoit-Levy, A., Bernard, J.-P., Bersanelli, M., Bielewicz, P., Bonaldi, A., Bonavera, L., Bond, J. R., Borrill, J., ... Zonca, A. (2016). Planck intermediate results XXXVIII. E- and B-modes of dust polarization from the magnetized filamentary structure of the interstellar medium. Astronomy and Astrophysics, 586, Article A141. https://doi.org/10.1051/0004-6361/201526506

@article{4f12c13e3ca640d6bd8c8a858c27d73a,

title = "Planck intermediate results XXXVIII. E- and B-modes of dust polarization from the magnetized filamentary structure of the interstellar medium",

abstract = "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 from Galactic dust. We present a statistical study of the filamentary structure of the 353 GHz Planck Stokes maps at high Galactic latitude, relevant to the study of dust emission as a polarized foreground to the CMB. We filter the intensity and polarization maps to isolate filaments in the range of angular scales where the power asymmetry between E-modes and B-modes is observed. Using the Smoothed Hessian Major Axis Filament Finder (SMAFF), we identify 259 filaments at high Galactic latitude, with lengths larger or equal to 2 degrees (corresponding to 3.5 pc in length for a typical distance of 100 pc). These filaments show a preferred orientation parallel to the magnetic field projected onto the plane of the sky, derived from their polarization angles. We present mean maps of the filaments in Stokes I, Q, U, E, and B, computed by stacking individual images rotated to align the orientations of the filaments. Combining the stacked images and the histogram of relative orientations, we estimate the mean polarization fraction of the filaments to be 11%. Furthermore, we show that the correlation between the filaments and the magnetic field orientations may account for the E and B asymmetry and the C-l(TE)/C-l(EE) ratio, reported in the power spectra analysis of the Planck 353 GHz polarization maps. Future models of the dust foreground for CMB polarization studies will need to take into account the observed correlation between the dust polarization and the structure of interstellar matter.",

keywords = "Polarization, ISM: general, Galaxy: ISM, Submillimeter: ISM",

author = "Ade, {P. A. R.} and N. Aghanim and M. Arnaud and M. Ashdown and J. Aumont and C. Baccigalupi and Banday, {A. J.} and Barreiro, {R. B.} and N. Bartolo and E. Battaner and K. Benabed and A. Benoit-Levy and J-P Bernard and M. Bersanelli and P. Bielewicz and A. Bonaldi and L. Bonavera and Bond, {J. R.} and J. Borrill and Bouchet, {F. R.} and F. Boulanger and A. Bracco and C. Burigana and J-F Cardoso and A. Catalano and A. Chamballu and R-R Chary and Chiang, {H. C.} and Christensen, {P. R.} and Colombo, {L. P. L.} and C. Combet and Cri, {B. P.} and A. Curto and F. Cuttaia and L. Danese and Davies, {R. D.} and Davis, {R. J.} and {De Bernardis}, P. and {de Rosa}, A. and {De Zotti}, Giulia and J. Delabrouille and J-M Delouis and C. Dickinson and Diego, {J. M.} and H. Dole and S. Donzelli and O. Dore and M. Douspis and J. Dunkley and X. Dupac and G. Efstathiou and F. Elsner and Ensslin, {T. A.} and Eriksen, {H. K.} and E. Falgarone and K. Ferriere and F. Finelli and O. Forni and M. Frailis and Fraisse, {A. A.} and E. Franceschi and A. Frolov and S. Galeotta and S. Galli and K. Ganga and T. Ghosh and M. Giard and E. Gjerlow and J. Gonzalez-Nuevo and Gorski, {K. M.} and A. Gruppuso and V. Guillet and Hansen, {F. K.} and Harrison, {D. L.} and G. Helou and C. Hernandez-Monteagudo and D. Herranz and Hildebrandt, {S. R.} and E. Hivon and Allan Hornstrup and W. Hovest and Z. Huang and Huffenberger, {K. M.} and G. Hurier and Jaffe, {T. R.} and Jones, {W. C.} and M. Juvela and E. Keihaenen and R. Kesldtalo and Kisner, {T. S.} and R. Kneiss' and J. Knoche and M. Kunz and H. Kurld-Suonio and J-M Lamarre and A. Lasenby and M. Lattanzi and Lawrence, {C. R.} and R. Leonardi and J. Leon-Tavares and E. Levrier and M. Liguori and Lilje, {P. B.} and Michael Linden-V{\o}rnle and M. Lopez-Caniego and Lubin, {P. M.} and Macias-Perez, {J. F.} and B. Maffei and D. Maino and N. Mandolesi and M. Maris and Martin, {P. G.} and E. Martinez-Gonzalez and S. Masi and S. Maialtese and P. McGehee and A. Melchiorri and A. Mennella and M. Migliaccio and M-A Miville-Deschenes and A. Moneti and L. Montier and G. Morgante and D. Mortlock and D. Munshi and Murphy, {J. A.} and P. Naselsky and F. Nati and P. Natoli and D. Novikov and I. Novikov and N. Oppermann and Oxborrow, {Carol Anne} and L. Pagano and Fernand Pajot and D. Paoletti and F. Pasian and O. Perdereau and V. Pettorino and F. Piacentini and M. Piat and E. Pierpaoli and S. Plaszczynski and E. Pointecouteau and G. Polenta and N. Ponthieu and Pratt, {G. W.} and S. Prunet and J-L Puget and Rachen, {J. P.} and Reach, {W. T.} and R. Rebolo and M. Reinecke and M. Remazeilles and C. Renault and A. Renzi and I. Ristorcelli and G. Rocha and C. Rosset and M. Rossetti and G. Roudier and Rubino-Martin, {J. A.} and B. Rusholme and M. Sandri and D. Santos and M. Savelainen and G. Savini and D. Scott and P. Serra and Soler, {J. D.} and V. Stolyarov and R. Sudiwala and R. Sunyaev and A-S Suur-Uski and J-F Sygnet and Tauber, {J. A.} and L. Terenzi and L. Toffolatti and M. Tomasi and M. Tristram and M. Tucci and G. Umana and L. Valenziano and J. Valiviita and {Van Tent}, B. and P. Vielva and F. Villa and Wade, {L. A.} and Wandelt, {B. D.} and Wehus, {I. K.} and D. Yvon and A. Zacchei and A. Zonca",

year = "2016",

doi = "10.1051/0004-6361/201526506",

language = "English",

volume = "586",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Ade, PAR, Aghanim, N, Arnaud, M, Ashdown, M, Aumont, J, Baccigalupi, C, Banday, AJ, Barreiro, RB, Bartolo, N, Battaner, E, Benabed, K, Benoit-Levy, A, Bernard, J-P, Bersanelli, M, Bielewicz, P, Bonaldi, A, Bonavera, L, Bond, JR, Borrill, J, Bouchet, FR, Boulanger, F, Bracco, A, Burigana, C, Cardoso, J-F, Catalano, A, Chamballu, A, Chary, R-R, Chiang, HC, Christensen, PR, Colombo, LPL, Combet, C, Cri, BP, Curto, A, Cuttaia, F, Danese, L, Davies, RD, Davis, RJ, De Bernardis, P, de Rosa, A, De Zotti, G, Delabrouille, J, Delouis, J-M, Dickinson, C, Diego, JM, Dole, H, Donzelli, S, Dore, O, Douspis, M, Dunkley, J, Dupac, X, Efstathiou, G, Elsner, F, Ensslin, TA, Eriksen, HK, Falgarone, E, Ferriere, K, Finelli, F, Forni, O, Frailis, M, Fraisse, AA, Franceschi, E, Frolov, A, Galeotta, S, Galli, S, Ganga, K, Ghosh, T, Giard, M, Gjerlow, E, Gonzalez-Nuevo, J, Gorski, KM, Gruppuso, A, Guillet, V, Hansen, FK, Harrison, DL, Helou, G, Hernandez-Monteagudo, C, Herranz, D, Hildebrandt, SR, Hivon, E, Hornstrup, A, Hovest, W, Huang, Z, Huffenberger, KM, Hurier, G, Jaffe, TR, Jones, WC, Juvela, M, Keihaenen, E, Kesldtalo, R, Kisner, TS, Kneiss', R, Knoche, J, Kunz, M, Kurld-Suonio, H, Lamarre, J-M, Lasenby, A, Lattanzi, M, Lawrence, CR, Leonardi, R, Leon-Tavares, J, Levrier, E, Liguori, M, Lilje, PB, Linden-Vørnle, M, Lopez-Caniego, M, Lubin, PM, Macias-Perez, JF, Maffei, B, Maino, D, Mandolesi, N, Maris, M, Martin, PG, Martinez-Gonzalez, E, Masi, S, Maialtese, S, McGehee, P, Melchiorri, A, Mennella, A, Migliaccio, M, Miville-Deschenes, M-A, Moneti, A, Montier, L, Morgante, G, Mortlock, D, Munshi, D, Murphy, JA, Naselsky, P, Nati, F, Natoli, P, Novikov, D, Novikov, I, Oppermann, N, Oxborrow, CA, Pagano, L, Pajot, F, Paoletti, D, Pasian, F, Perdereau, O, Pettorino, V, Piacentini, F, Piat, M, Pierpaoli, E, Plaszczynski, S, Pointecouteau, E, Polenta, G, Ponthieu, N, Pratt, GW, Prunet, S, Puget, J-L, Rachen, JP, Reach, WT, Rebolo, R, Reinecke, M, Remazeilles, M, Renault, C, Renzi, A, Ristorcelli, I, Rocha, G, Rosset, C, Rossetti, M, Roudier, G, Rubino-Martin, JA, Rusholme, B, Sandri, M, Santos, D, Savelainen, M, Savini, G, Scott, D, Serra, P, Soler, JD, Stolyarov, V, Sudiwala, R, Sunyaev, R, Suur-Uski, A-S, Sygnet, J-F, Tauber, JA, Terenzi, L, Toffolatti, L, Tomasi, M, Tristram, M, Tucci, M, Umana, G, Valenziano, L, Valiviita, J, Van Tent, B, Vielva, P, Villa, F, Wade, LA, Wandelt, BD, Wehus, IK, Yvon, D, Zacchei, A & Zonca, A 2016, 'Planck intermediate results XXXVIII. E- and B-modes of dust polarization from the magnetized filamentary structure of the interstellar medium', Astronomy and Astrophysics, vol. 586, A141. https://doi.org/10.1051/0004-6361/201526506

TY - JOUR

T1 - Planck intermediate results XXXVIII. E- and B-modes of dust polarization from the magnetized filamentary structure of the interstellar medium

AU - Ade, P. A. R.

AU - Aghanim, N.

AU - Arnaud, M.

AU - Ashdown, M.

AU - Aumont, J.

AU - Baccigalupi, C.

AU - Banday, A. J.

AU - Barreiro, R. B.

AU - Bartolo, N.

AU - Battaner, E.

AU - Benabed, K.

AU - Benoit-Levy, A.

AU - Bernard, J-P

AU - Bersanelli, M.

AU - Bielewicz, P.

AU - Bonaldi, A.

AU - Bonavera, L.

AU - Bond, J. R.

AU - Borrill, J.

AU - Bouchet, F. R.

AU - Boulanger, F.

AU - Bracco, A.

AU - Burigana, C.

AU - Cardoso, J-F

AU - Catalano, A.

AU - Chamballu, A.

AU - Chary, R-R

AU - Chiang, H. C.

AU - Christensen, P. R.

AU - Colombo, L. P. L.

AU - Combet, C.

AU - Cri, B. P.

AU - Curto, A.

AU - Cuttaia, F.

AU - Danese, L.

AU - Davies, R. D.

AU - Davis, R. J.

AU - De Bernardis, P.

AU - de Rosa, A.

AU - De Zotti, Giulia

AU - Delabrouille, J.

AU - Delouis, J-M

AU - Dickinson, C.

AU - Diego, J. M.

AU - Dole, H.

AU - Donzelli, S.

AU - Dore, O.

AU - Douspis, M.

AU - Dunkley, J.

AU - Dupac, X.

AU - Efstathiou, G.

AU - Elsner, F.

AU - Ensslin, T. A.

AU - Eriksen, H. K.

AU - Falgarone, E.

AU - Ferriere, K.

AU - Finelli, F.

AU - Forni, O.

AU - Frailis, M.

AU - Fraisse, A. A.

AU - Franceschi, E.

AU - Frolov, A.

AU - Galeotta, S.

AU - Galli, S.

AU - Ganga, K.

AU - Ghosh, T.

AU - Giard, M.

AU - Gjerlow, E.

AU - Gonzalez-Nuevo, J.

AU - Gorski, K. M.

AU - Gruppuso, A.

AU - Guillet, V.

AU - Hansen, F. K.

AU - Harrison, D. L.

AU - Helou, G.

AU - Hernandez-Monteagudo, C.

AU - Herranz, D.

AU - Hildebrandt, S. R.

AU - Hivon, E.

AU - Hornstrup, Allan

AU - Hovest, W.

AU - Huang, Z.

AU - Huffenberger, K. M.

AU - Hurier, G.

AU - Jaffe, T. R.

AU - Jones, W. C.

AU - Juvela, M.

AU - Keihaenen, E.

AU - Kesldtalo, R.

AU - Kisner, T. S.

AU - Kneiss', R.

AU - Knoche, J.

AU - Kunz, M.

AU - Kurld-Suonio, H.

AU - Lamarre, J-M

AU - Lasenby, A.

AU - Lattanzi, M.

AU - Lawrence, C. R.

AU - Leonardi, R.

AU - Leon-Tavares, J.

AU - Levrier, E.

AU - Liguori, M.

AU - Lilje, P. B.

AU - Linden-Vørnle, Michael

AU - Lopez-Caniego, M.

AU - Lubin, P. M.

AU - Macias-Perez, J. F.

AU - Maffei, B.

AU - Maino, D.

AU - Mandolesi, N.

AU - Maris, M.

AU - Martin, P. G.

AU - Martinez-Gonzalez, E.

AU - Masi, S.

AU - Maialtese, S.

AU - McGehee, P.

AU - Melchiorri, A.

AU - Mennella, A.

AU - Migliaccio, M.

AU - Miville-Deschenes, M-A

AU - Moneti, A.

AU - Montier, L.

AU - Morgante, G.

AU - Mortlock, D.

AU - Munshi, D.

AU - Murphy, J. A.

AU - Naselsky, P.

AU - Nati, F.

AU - Natoli, P.

AU - Novikov, D.

AU - Novikov, I.

AU - Oppermann, N.

AU - Oxborrow, Carol Anne

AU - Pagano, L.

AU - Pajot, Fernand

AU - Paoletti, D.

AU - Pasian, F.

AU - Perdereau, O.

AU - Pettorino, V.

AU - Piacentini, F.

AU - Piat, M.

AU - Pierpaoli, E.

AU - Plaszczynski, S.

AU - Pointecouteau, E.

AU - Polenta, G.

AU - Ponthieu, N.

AU - Pratt, G. W.

AU - Prunet, S.

AU - Puget, J-L

AU - Rachen, J. P.

AU - Reach, W. T.

AU - Rebolo, R.

AU - Reinecke, M.

AU - Remazeilles, M.

AU - Renault, C.

AU - Renzi, A.

AU - Ristorcelli, I.

AU - Rocha, G.

AU - Rosset, C.

AU - Rossetti, M.

AU - Roudier, G.

AU - Rubino-Martin, J. A.

AU - Rusholme, B.

AU - Sandri, M.

AU - Santos, D.

AU - Savelainen, M.

AU - Savini, G.

AU - Scott, D.

AU - Serra, P.

AU - Soler, J. D.

AU - Stolyarov, V.

AU - Sudiwala, R.

AU - Sunyaev, R.

AU - Suur-Uski, A-S

AU - Sygnet, J-F

AU - Tauber, J. A.

AU - Terenzi, L.

AU - Toffolatti, L.

AU - Tomasi, M.

AU - Tristram, M.

AU - Tucci, M.

AU - Umana, G.

AU - Valenziano, L.

AU - Valiviita, J.

AU - Van Tent, B.

AU - Vielva, P.

AU - Villa, F.

AU - Wade, L. A.

AU - Wandelt, B. D.

AU - Wehus, I. K.

AU - Yvon, D.

AU - Zacchei, A.

AU - Zonca, A.

PY - 2016

Y1 - 2016

N2 - 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 from Galactic dust. We present a statistical study of the filamentary structure of the 353 GHz Planck Stokes maps at high Galactic latitude, relevant to the study of dust emission as a polarized foreground to the CMB. We filter the intensity and polarization maps to isolate filaments in the range of angular scales where the power asymmetry between E-modes and B-modes is observed. Using the Smoothed Hessian Major Axis Filament Finder (SMAFF), we identify 259 filaments at high Galactic latitude, with lengths larger or equal to 2 degrees (corresponding to 3.5 pc in length for a typical distance of 100 pc). These filaments show a preferred orientation parallel to the magnetic field projected onto the plane of the sky, derived from their polarization angles. We present mean maps of the filaments in Stokes I, Q, U, E, and B, computed by stacking individual images rotated to align the orientations of the filaments. Combining the stacked images and the histogram of relative orientations, we estimate the mean polarization fraction of the filaments to be 11%. Furthermore, we show that the correlation between the filaments and the magnetic field orientations may account for the E and B asymmetry and the C-l(TE)/C-l(EE) ratio, reported in the power spectra analysis of the Planck 353 GHz polarization maps. Future models of the dust foreground for CMB polarization studies will need to take into account the observed correlation between the dust polarization and the structure of interstellar matter.

AB - 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 from Galactic dust. We present a statistical study of the filamentary structure of the 353 GHz Planck Stokes maps at high Galactic latitude, relevant to the study of dust emission as a polarized foreground to the CMB. We filter the intensity and polarization maps to isolate filaments in the range of angular scales where the power asymmetry between E-modes and B-modes is observed. Using the Smoothed Hessian Major Axis Filament Finder (SMAFF), we identify 259 filaments at high Galactic latitude, with lengths larger or equal to 2 degrees (corresponding to 3.5 pc in length for a typical distance of 100 pc). These filaments show a preferred orientation parallel to the magnetic field projected onto the plane of the sky, derived from their polarization angles. We present mean maps of the filaments in Stokes I, Q, U, E, and B, computed by stacking individual images rotated to align the orientations of the filaments. Combining the stacked images and the histogram of relative orientations, we estimate the mean polarization fraction of the filaments to be 11%. Furthermore, we show that the correlation between the filaments and the magnetic field orientations may account for the E and B asymmetry and the C-l(TE)/C-l(EE) ratio, reported in the power spectra analysis of the Planck 353 GHz polarization maps. Future models of the dust foreground for CMB polarization studies will need to take into account the observed correlation between the dust polarization and the structure of interstellar matter.

KW - Polarization

KW - ISM: general

KW - Galaxy: ISM

KW - Submillimeter: ISM

U2 - 10.1051/0004-6361/201526506

DO - 10.1051/0004-6361/201526506

M3 - Journal article

SN - 0004-6361

VL - 586

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A141

ER -

Planck intermediate results XXXVIII. E- and B-modes of dust polarization from the magnetized filamentary structure of the interstellar medium

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