Planck intermediate results. XII: Diffuse Galactic components in the Gould Belt System

Planck Collaboration,; P. A. R. Ade; N. Aghanim; Marie-Helene Alves; M. Arnaud; M. Ashdown; F. Atrio-Barandela; J. Aumont; C. Baccigalupi; A. Balbi; A. J. Banday; R. B. Barreiro; J. G. Bartlett; E. Battaner; L. Bedini; K. Benabed; A. Benoît; J. -P. Bernard; M. Bersanelli; A. Bonaldi; J. R. Bond; J. Borrill; F. R. Bouchet; F. Boulanger; C. Burigana; Robb Butler; P. Cabella; J. -F. Cardoso; X. Chen; Lung-Yih Chiang; P. R. Christensen; D. L. Clements; S. Colombi; L. P. L. Colombo; A. Coulais; F. Cuttaia; R. D. Davies; Rebecca Davis; P. de Bernardis; G. de Gasperis; G. de Zotti; J. Delabrouille; C. Dickinson; J. M. Diego; G. Dobler; H. Dole; S. Donzelli; O. Doré; M. Douspis; X. Dupac; T. A. Enßlin; F. Finelli; O. Forni; M. Frailis; E. Franceschi; S. Galeotta; K. Ganga; R. T. Génova-Santos; T. Ghosh; M. Giard; G. Giardino; Y. Giraud-Héraud; J. González-Nuevo; K. M. Górski; A. Gregorio; A. Gruppuso; F. K. Hansen; D. Harrison; C. Hernández-Monteagudo; Steen Hildebrandt; E. Hivon; M. Hobson; W. A. Holmes; Allan Hornstrup; W. Hovest; K. M. Huffenberger; T. R. Jaffe; A. H. Jaffe; M. Juvela; E. Keihänen; R. Keskitalo; T. S. Kisner; J. Knoche; M. Kunz; H. Kurki-Suonio; G. Lagache; A. Lähteenmäki; J. -M. Lamarre; A. Lasenby; C. R. Lawrence; S. Leach; R. Leonardi; P. B. Lilje; Michael Linden-Vørnle; P. M. Lubin; J. F. Macías-Pérez; B. Maffei; D. Maino; N. Mandolesi; M. Maris; D. J. Marshall; P. G. Martin; E. Martínez-González; S. Masi; M. Massardi; S. Matarrese; P. Mazzotta; A. Melchiorri; A. Mennella; S. Mitra; M. -A. Miville-Deschênes; A. Moneti; L. Montier; G. Morgante; D. Mortlock; D. Munshi; Jonathan Murphy; P. Naselsky; F. Nati; P. Natoli; Hans Ulrik Nørgaard-Nielsen; F. Noviello; D. Novikov; Igor Dmitrievich Novikov; S. Osborne; Carol Anne Oxborrow; F. Pajot; R. Paladini; D. Paoletti; M. Peel; L. Perotto; F. Perrotta; F. Piacentini; M. Piat; E. Pierpaoli; D. Pietrobon; S. Plaszczynski; E. Pointecouteau; G. Polenta; L. Popa; T. Poutanen; G. W. Pratt; S. Prunet; J. -L. Puget; J. P. Rachen; W. T. Reach; R. Rebolo; M. Reinecke; C. Renault; S. Ricciardi; I. Ristorcelli; G. Rocha; C. Rosset; J. A. Rubiño-Martín; B. Rusholme; E. Salerno; M. Sandri; G. Savini; D. Scott; L. Spencer; V. Stolyarov; R. Sudiwala; A. -S. Suur-Uski; J. -F. Sygnet; J. A. Tauber; L. Terenzi; C. T. Tibbs; L. Toffolatti; M. Tomasi; M. Tristram; L. Valenziano; B. Van Tent; J. Varis; P. Vielva; Frank Villa; N. Vittorio; L. A. Wade; B. D. Wandelt; N. Ysard; D. Yvon; A. Zacchei; A. Zonca

doi:10.1051/0004-6361/201321160

Planck intermediate results. XII: Diffuse Galactic components in the Gould Belt System

Planck Collaboration,, P. A. R. Ade, N. Aghanim, Marie-Helene Alves, M. Arnaud, M. Ashdown, F. Atrio-Barandela, J. Aumont, C. Baccigalupi, A. Balbi, A. J. Banday, R. B. Barreiro, J. G. Bartlett, E. Battaner, L. Bedini, K. Benabed, A. Benoît, J. -P. Bernard, M. Bersanelli, A. BonaldiJ. R. Bond, J. Borrill, F. R. Bouchet, F. Boulanger, C. Burigana, Robb Butler, P. Cabella, J. -F. Cardoso, X. Chen, Lung-Yih Chiang, P. R. Christensen, D. L. Clements, S. Colombi, L. P. L. Colombo, A. Coulais, F. Cuttaia, R. D. Davies, Rebecca Davis, P. de Bernardis, G. de Gasperis, G. de Zotti, J. Delabrouille, C. Dickinson, J. M. Diego, G. Dobler, H. Dole, S. Donzelli, O. Doré, M. Douspis, X. Dupac, T. A. Enßlin, F. Finelli, O. Forni, M. Frailis, E. Franceschi, S. Galeotta, K. Ganga, R. T. Génova-Santos, T. Ghosh, M. Giard, G. Giardino, Y. Giraud-Héraud, J. González-Nuevo, K. M. Górski, A. Gregorio, A. Gruppuso, F. K. Hansen, D. Harrison, C. Hernández-Monteagudo, Steen Hildebrandt, E. Hivon, M. Hobson, W. A. Holmes, Allan Hornstrup, W. Hovest, K. M. Huffenberger, T. R. Jaffe, A. H. Jaffe, M. Juvela, E. Keihänen, R. Keskitalo, T. S. Kisner, J. Knoche, M. Kunz, H. Kurki-Suonio, G. Lagache, A. Lähteenmäki, J. -M. Lamarre, A. Lasenby, C. R. Lawrence, S. Leach, R. Leonardi, P. B. Lilje, Michael Linden-Vørnle, P. M. Lubin, J. F. Macías-Pérez, B. Maffei, D. Maino, N. Mandolesi, M. Maris, D. J. Marshall, P. G. Martin, E. Martínez-González, S. Masi, M. Massardi, S. Matarrese, P. Mazzotta, A. Melchiorri, A. Mennella, S. Mitra, M. -A. Miville-Deschênes, A. Moneti, L. Montier, G. Morgante, D. Mortlock, D. Munshi, Jonathan Murphy, P. Naselsky, F. Nati, P. Natoli, Hans Ulrik Nørgaard-Nielsen, F. Noviello, D. Novikov, Igor Dmitrievich Novikov, S. Osborne, Carol Anne Oxborrow, F. Pajot, R. Paladini, D. Paoletti, M. Peel, L. Perotto, F. Perrotta, F. Piacentini, M. Piat, E. Pierpaoli, D. Pietrobon, S. Plaszczynski, E. Pointecouteau, G. Polenta, L. Popa, T. Poutanen, G. W. Pratt, S. Prunet, J. -L. Puget, J. P. Rachen, W. T. Reach, R. Rebolo, M. Reinecke, C. Renault, S. Ricciardi, I. Ristorcelli, G. Rocha, C. Rosset, J. A. Rubiño-Martín, B. Rusholme, E. Salerno, M. Sandri, G. Savini, D. Scott, L. Spencer, V. Stolyarov, R. Sudiwala, A. -S. Suur-Uski, J. -F. Sygnet, J. A. Tauber, L. Terenzi, C. T. Tibbs, L. Toffolatti, M. Tomasi, M. Tristram, L. Valenziano, B. Van Tent, J. Varis, P. Vielva, Frank Villa, N. Vittorio, L. A. Wade, B. D. Wandelt, N. Ysard, D. Yvon, A. Zacchei, A. Zonca

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Abstract

We perform an analysis of the diffuse low-frequency Galactic components in the Southern part of the Gould Belt system (130^\circ\leq l\leq 230^\circ and -50^\circ\leq b\leq -10^\circ). Strong ultra-violet (UV) flux coming from the Gould Belt super-association is responsible for bright diffuse foregrounds that we observe from our position inside the system and that can help us improve our knowledge of the Galactic emission. Free-free emission and anomalous microwave emission (AME) are the dominant components at low frequencies (\nu <40 GHz), while synchrotron emission is very smooth and faint. We separate diffuse free-free emission and AME from synchrotron emission and thermal dust emission by using Planck data, complemented by ancillary data, using the "Correlated Component Analysis" (CCA) component separation method and we compare with the results of cross-correlation of foreground templates with the frequency maps. We estimate the electron temperature T_e from H$\alpha$ and free-free emission using two methods (temperature-temperature plot and cross-correlation) and we obtain T_e ranging from 3100 to 5200 K, for an effective fraction of absorbing dust along the line of sight of 30% (f_d=0.3). We estimate the frequency spectrum of the diffuse AME and we recover a peak frequency (in flux density units) of 25.5 \pm 1.5 GHz. We verify the reliability of this result with realistic simulations that include the presence of biases in the spectral model for the AME and in the free-free template. By combining physical models for vibrational and rotational dust emission and adding the constraints from the thermal dust spectrum from Planck and IRAS we are able to get a good description of the frequency spectrum of the AME for plausible values of the local density and radiation field.

Original language	English
Article number	A53
Journal	Astronomy and Astrophysics
Volume	557
Number of pages	20
ISSN	0004-6361
DOIs	https://doi.org/10.1051/0004-6361/201321160
Publication status	Published - 2013

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Planck Collaboration,, Ade, P. A. R., Aghanim, N., Alves, M.-H., Arnaud, M., Ashdown, M., Atrio-Barandela, F., Aumont, J., Baccigalupi, C., Balbi, A., Banday, A. J., Barreiro, R. B., Bartlett, J. G., Battaner, E., Bedini, L., Benabed, K., Benoît, A., Bernard, J. .-P., Bersanelli, M., ... Zonca, A. (2013). Planck intermediate results. XII: Diffuse Galactic components in the Gould Belt System. Astronomy and Astrophysics, 557, Article A53. https://doi.org/10.1051/0004-6361/201321160

@article{eadaeabfd373451583be808d4484ce5c,

title = "Planck intermediate results. XII: Diffuse Galactic components in the Gould Belt System",

abstract = "We perform an analysis of the diffuse low-frequency Galactic components in the Southern part of the Gould Belt system (130^\circ\leq l\leq 230^\circ and -50^\circ\leq b\leq -10^\circ). Strong ultra-violet (UV) flux coming from the Gould Belt super-association is responsible for bright diffuse foregrounds that we observe from our position inside the system and that can help us improve our knowledge of the Galactic emission. Free-free emission and anomalous microwave emission (AME) are the dominant components at low frequencies (\nu <40 GHz), while synchrotron emission is very smooth and faint. We separate diffuse free-free emission and AME from synchrotron emission and thermal dust emission by using Planck data, complemented by ancillary data, using the {"}Correlated Component Analysis{"} (CCA) component separation method and we compare with the results of cross-correlation of foreground templates with the frequency maps. We estimate the electron temperature T_e from H$\alpha$ and free-free emission using two methods (temperature-temperature plot and cross-correlation) and we obtain T_e ranging from 3100 to 5200 K, for an effective fraction of absorbing dust along the line of sight of 30% (f_d=0.3). We estimate the frequency spectrum of the diffuse AME and we recover a peak frequency (in flux density units) of 25.5 \pm 1.5 GHz. We verify the reliability of this result with realistic simulations that include the presence of biases in the spectral model for the AME and in the free-free template. By combining physical models for vibrational and rotational dust emission and adding the constraints from the thermal dust spectrum from Planck and IRAS we are able to get a good description of the frequency spectrum of the AME for plausible values of the local density and radiation field.",

author = "{Planck Collaboration,} and Ade, {P. A. R.} and N. Aghanim and Marie-Helene Alves and M. Arnaud and M. Ashdown and F. Atrio-Barandela and J. Aumont and C. Baccigalupi and A. Balbi and Banday, {A. J.} and Barreiro, {R. B.} and Bartlett, {J. G.} and E. Battaner and L. Bedini and K. Benabed and A. Beno{\^i}t and Bernard, {J. -P.} and M. Bersanelli and A. Bonaldi and Bond, {J. R.} and J. Borrill and Bouchet, {F. R.} and F. Boulanger and C. Burigana and Robb Butler and P. Cabella and Cardoso, {J. -F.} and X. Chen and Lung-Yih Chiang and Christensen, {P. R.} and Clements, {D. L.} and S. Colombi and Colombo, {L. P. L.} and A. Coulais and F. Cuttaia and Davies, {R. D.} and Rebecca Davis and {de Bernardis}, P. and {de Gasperis}, G. and {de Zotti}, G. and J. Delabrouille and C. Dickinson and Diego, {J. M.} and G. Dobler and H. Dole and S. Donzelli and O. Dor{\'e} and M. Douspis and X. Dupac and En{\ss}lin, {T. A.} and F. Finelli and O. Forni and M. Frailis and E. Franceschi and S. Galeotta and K. Ganga and G{\'e}nova-Santos, {R. T.} and T. Ghosh and M. Giard and G. Giardino and Y. Giraud-H{\'e}raud and J. Gonz{\'a}lez-Nuevo and G{\'o}rski, {K. M.} and A. Gregorio and A. Gruppuso and Hansen, {F. K.} and D. Harrison and C. Hern{\'a}ndez-Monteagudo and Steen Hildebrandt and E. Hivon and M. Hobson and Holmes, {W. A.} and Allan Hornstrup and W. Hovest and Huffenberger, {K. M.} and Jaffe, {T. R.} and Jaffe, {A. H.} and M. Juvela and E. Keih{\"a}nen and R. Keskitalo and Kisner, {T. S.} and J. Knoche and M. Kunz and H. Kurki-Suonio and G. Lagache and A. L{\"a}hteenm{\"a}ki and Lamarre, {J. -M.} and A. Lasenby and Lawrence, {C. R.} and S. Leach and R. Leonardi and Lilje, {P. B.} and Michael Linden-V{\o}rnle and Lubin, {P. M.} and Mac{\'i}as-P{\'e}rez, {J. F.} and B. Maffei and D. Maino and N. Mandolesi and M. Maris and Marshall, {D. J.} and Martin, {P. G.} and E. Mart{\'i}nez-Gonz{\'a}lez and S. Masi and M. Massardi and S. Matarrese and P. Mazzotta and A. Melchiorri and A. Mennella and S. Mitra and Miville-Desch{\^e}nes, {M. -A.} and A. Moneti and L. Montier and G. Morgante and D. Mortlock and D. Munshi and Jonathan Murphy and P. Naselsky and F. Nati and P. Natoli and N{\o}rgaard-Nielsen, {Hans Ulrik} and F. Noviello and D. Novikov and Novikov, {Igor Dmitrievich} and S. Osborne and Oxborrow, {Carol Anne} and F. Pajot and R. Paladini and D. Paoletti and M. Peel and L. Perotto and F. Perrotta and F. Piacentini and M. Piat and E. Pierpaoli and D. Pietrobon and S. Plaszczynski and E. Pointecouteau and G. Polenta and L. Popa and T. Poutanen and Pratt, {G. W.} and S. Prunet and Puget, {J. -L.} and Rachen, {J. P.} and Reach, {W. T.} and R. Rebolo and M. Reinecke and C. Renault and S. Ricciardi and I. Ristorcelli and G. Rocha and C. Rosset and Rubi{\~n}o-Mart{\'i}n, {J. A.} and B. Rusholme and E. Salerno and M. Sandri and G. Savini and D. Scott and L. Spencer and V. Stolyarov and R. Sudiwala and Suur-Uski, {A. -S.} and Sygnet, {J. -F.} and Tauber, {J. A.} and L. Terenzi and Tibbs, {C. T.} and L. Toffolatti and M. Tomasi and M. Tristram and L. Valenziano and {Van Tent}, B. and J. Varis and P. Vielva and Frank Villa and N. Vittorio and Wade, {L. A.} and Wandelt, {B. D.} and N. Ysard and D. Yvon and A. Zacchei and A. Zonca",

year = "2013",

doi = "10.1051/0004-6361/201321160",

language = "English",

volume = "557",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Planck Collaboration, Ade, PAR, Aghanim, N, Alves, M-H, Arnaud, M, Ashdown, M, Atrio-Barandela, F, Aumont, J, Baccigalupi, C, Balbi, A, Banday, AJ, Barreiro, RB, Bartlett, JG, Battaner, E, Bedini, L, Benabed, K, Benoît, A, Bernard, J-P, Bersanelli, M, Bonaldi, A, Bond, JR, Borrill, J, Bouchet, FR, Boulanger, F, Burigana, C, Butler, R, Cabella, P, Cardoso, J-F, Chen, X, Chiang, L-Y, Christensen, PR, Clements, DL, Colombi, S, Colombo, LPL, Coulais, A, Cuttaia, F, Davies, RD, Davis, R, de Bernardis, P, de Gasperis, G, de Zotti, G, Delabrouille, J, Dickinson, C, Diego, JM, Dobler, G, Dole, H, Donzelli, S, Doré, O, Douspis, M, Dupac, X, Enßlin, TA, Finelli, F, Forni, O, Frailis, M, Franceschi, E, Galeotta, S, Ganga, K, Génova-Santos, RT, Ghosh, T, Giard, M, Giardino, G, Giraud-Héraud, Y, González-Nuevo, J, Górski, KM, Gregorio, A, Gruppuso, A, Hansen, FK, Harrison, D, Hernández-Monteagudo, C, Hildebrandt, S, Hivon, E, Hobson, M, Holmes, WA, Hornstrup, A, Hovest, W, Huffenberger, KM, Jaffe, TR, Jaffe, AH, Juvela, M, Keihänen, E, Keskitalo, R, Kisner, TS, Knoche, J, Kunz, M, Kurki-Suonio, H, Lagache, G, Lähteenmäki, A, Lamarre, J-M, Lasenby, A, Lawrence, CR, Leach, S, Leonardi, R, Lilje, PB, Linden-Vørnle, M, Lubin, PM, Macías-Pérez, JF, Maffei, B, Maino, D, Mandolesi, N, Maris, M, Marshall, DJ, Martin, PG, Martínez-González, E, Masi, S, Massardi, M, Matarrese, S, Mazzotta, P, Melchiorri, A, Mennella, A, Mitra, S, Miville-Deschênes, M-A, Moneti, A, Montier, L, Morgante, G, Mortlock, D, Munshi, D, Murphy, J, Naselsky, P, Nati, F, Natoli, P, Nørgaard-Nielsen, HU, Noviello, F, Novikov, D, Novikov, ID, Osborne, S, Oxborrow, CA, Pajot, F, Paladini, R, Paoletti, D, Peel, M, Perotto, L, Perrotta, F, Piacentini, F, Piat, M, Pierpaoli, E, Pietrobon, D, Plaszczynski, S, Pointecouteau, E, Polenta, G, Popa, L, Poutanen, T, Pratt, GW, Prunet, S, Puget, J-L, Rachen, JP, Reach, WT, Rebolo, R, Reinecke, M, Renault, C, Ricciardi, S, Ristorcelli, I, Rocha, G, Rosset, C, Rubiño-Martín, JA, Rusholme, B, Salerno, E, Sandri, M, Savini, G, Scott, D, Spencer, L, Stolyarov, V, Sudiwala, R, Suur-Uski, A-S, Sygnet, J-F, Tauber, JA, Terenzi, L, Tibbs, CT, Toffolatti, L, Tomasi, M, Tristram, M, Valenziano, L, Van Tent, B, Varis, J, Vielva, P, Villa, F, Vittorio, N, Wade, LA, Wandelt, BD, Ysard, N, Yvon, D, Zacchei, A & Zonca, A 2013, 'Planck intermediate results. XII: Diffuse Galactic components in the Gould Belt System', Astronomy and Astrophysics, vol. 557, A53. https://doi.org/10.1051/0004-6361/201321160

TY - JOUR

T1 - Planck intermediate results. XII: Diffuse Galactic components in the Gould Belt System

AU - Planck Collaboration,,

AU - Ade, P. A. R.

AU - Aghanim, N.

AU - Alves, Marie-Helene

AU - Arnaud, M.

AU - Ashdown, M.

AU - Atrio-Barandela, F.

AU - Aumont, J.

AU - Baccigalupi, C.

AU - Balbi, A.

AU - Banday, A. J.

AU - Barreiro, R. B.

AU - Bartlett, J. G.

AU - Battaner, E.

AU - Bedini, L.

AU - Benabed, K.

AU - Benoît, A.

AU - Bernard, J. -P.

AU - Bersanelli, M.

AU - Bonaldi, A.

AU - Bond, J. R.

AU - Borrill, J.

AU - Bouchet, F. R.

AU - Boulanger, F.

AU - Burigana, C.

AU - Butler, Robb

AU - Cabella, P.

AU - Cardoso, J. -F.

AU - Chen, X.

AU - Chiang, Lung-Yih

AU - Christensen, P. R.

AU - Clements, D. L.

AU - Colombi, S.

AU - Colombo, L. P. L.

AU - Coulais, A.

AU - Cuttaia, F.

AU - Davies, R. D.

AU - Davis, Rebecca

AU - de Bernardis, P.

AU - de Gasperis, G.

AU - de Zotti, G.

AU - Delabrouille, J.

AU - Dickinson, C.

AU - Diego, J. M.

AU - Dobler, G.

AU - Dole, H.

AU - Donzelli, S.

AU - Doré, O.

AU - Douspis, M.

AU - Dupac, X.

AU - Enßlin, T. A.

AU - Finelli, F.

AU - Forni, O.

AU - Frailis, M.

AU - Franceschi, E.

AU - Galeotta, S.

AU - Ganga, K.

AU - Génova-Santos, R. T.

AU - Ghosh, T.

AU - Giard, M.

AU - Giardino, G.

AU - Giraud-Héraud, Y.

AU - González-Nuevo, J.

AU - Górski, K. M.

AU - Gregorio, A.

AU - Gruppuso, A.

AU - Hansen, F. K.

AU - Harrison, D.

AU - Hernández-Monteagudo, C.

AU - Hildebrandt, Steen

AU - Hivon, E.

AU - Hobson, M.

AU - Holmes, W. A.

AU - Hornstrup, Allan

AU - Hovest, W.

AU - Huffenberger, K. M.

AU - Jaffe, T. R.

AU - Jaffe, A. H.

AU - Juvela, M.

AU - Keihänen, E.

AU - Keskitalo, R.

AU - Kisner, T. S.

AU - Knoche, J.

AU - Kunz, M.

AU - Kurki-Suonio, H.

AU - Lagache, G.

AU - Lähteenmäki, A.

AU - Lamarre, J. -M.

AU - Lasenby, A.

AU - Lawrence, C. R.

AU - Leach, S.

AU - Leonardi, R.

AU - Lilje, P. B.

AU - Linden-Vørnle, Michael

AU - Lubin, P. M.

AU - Macías-Pérez, J. F.

AU - Maffei, B.

AU - Maino, D.

AU - Mandolesi, N.

AU - Maris, M.

AU - Marshall, D. J.

AU - Martin, P. G.

AU - Martínez-González, E.

AU - Masi, S.

AU - Massardi, M.

AU - Matarrese, S.

AU - Mazzotta, P.

AU - Melchiorri, A.

AU - Mennella, A.

AU - Mitra, S.

AU - Miville-Deschênes, M. -A.

AU - Moneti, A.

AU - Montier, L.

AU - Morgante, G.

AU - Mortlock, D.

AU - Munshi, D.

AU - Murphy, Jonathan

AU - Naselsky, P.

AU - Nati, F.

AU - Natoli, P.

AU - Nørgaard-Nielsen, Hans Ulrik

AU - Noviello, F.

AU - Novikov, D.

AU - Novikov, Igor Dmitrievich

AU - Osborne, S.

AU - Oxborrow, Carol Anne

AU - Pajot, F.

AU - Paladini, R.

AU - Paoletti, D.

AU - Peel, M.

AU - Perotto, L.

AU - Perrotta, F.

AU - Piacentini, F.

AU - Piat, M.

AU - Pierpaoli, E.

AU - Pietrobon, D.

AU - Plaszczynski, S.

AU - Pointecouteau, E.

AU - Polenta, G.

AU - Popa, L.

AU - Poutanen, T.

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 - Renault, C.

AU - Ricciardi, S.

AU - Ristorcelli, I.

AU - Rocha, G.

AU - Rosset, C.

AU - Rubiño-Martín, J. A.

AU - Rusholme, B.

AU - Salerno, E.

AU - Sandri, M.

AU - Savini, G.

AU - Scott, D.

AU - Spencer, L.

AU - Stolyarov, V.

AU - Sudiwala, R.

AU - Suur-Uski, A. -S.

AU - Sygnet, J. -F.

AU - Tauber, J. A.

AU - Terenzi, L.

AU - Tibbs, C. T.

AU - Toffolatti, L.

AU - Tomasi, M.

AU - Tristram, M.

AU - Valenziano, L.

AU - Van Tent, B.

AU - Varis, J.

AU - Vielva, P.

AU - Villa, Frank

AU - Vittorio, N.

AU - Wade, L. A.

AU - Wandelt, B. D.

AU - Ysard, N.

AU - Yvon, D.

AU - Zacchei, A.

AU - Zonca, A.

PY - 2013

Y1 - 2013

N2 - We perform an analysis of the diffuse low-frequency Galactic components in the Southern part of the Gould Belt system (130^\circ\leq l\leq 230^\circ and -50^\circ\leq b\leq -10^\circ). Strong ultra-violet (UV) flux coming from the Gould Belt super-association is responsible for bright diffuse foregrounds that we observe from our position inside the system and that can help us improve our knowledge of the Galactic emission. Free-free emission and anomalous microwave emission (AME) are the dominant components at low frequencies (\nu <40 GHz), while synchrotron emission is very smooth and faint. We separate diffuse free-free emission and AME from synchrotron emission and thermal dust emission by using Planck data, complemented by ancillary data, using the "Correlated Component Analysis" (CCA) component separation method and we compare with the results of cross-correlation of foreground templates with the frequency maps. We estimate the electron temperature T_e from H$\alpha$ and free-free emission using two methods (temperature-temperature plot and cross-correlation) and we obtain T_e ranging from 3100 to 5200 K, for an effective fraction of absorbing dust along the line of sight of 30% (f_d=0.3). We estimate the frequency spectrum of the diffuse AME and we recover a peak frequency (in flux density units) of 25.5 \pm 1.5 GHz. We verify the reliability of this result with realistic simulations that include the presence of biases in the spectral model for the AME and in the free-free template. By combining physical models for vibrational and rotational dust emission and adding the constraints from the thermal dust spectrum from Planck and IRAS we are able to get a good description of the frequency spectrum of the AME for plausible values of the local density and radiation field.

AB - We perform an analysis of the diffuse low-frequency Galactic components in the Southern part of the Gould Belt system (130^\circ\leq l\leq 230^\circ and -50^\circ\leq b\leq -10^\circ). Strong ultra-violet (UV) flux coming from the Gould Belt super-association is responsible for bright diffuse foregrounds that we observe from our position inside the system and that can help us improve our knowledge of the Galactic emission. Free-free emission and anomalous microwave emission (AME) are the dominant components at low frequencies (\nu <40 GHz), while synchrotron emission is very smooth and faint. We separate diffuse free-free emission and AME from synchrotron emission and thermal dust emission by using Planck data, complemented by ancillary data, using the "Correlated Component Analysis" (CCA) component separation method and we compare with the results of cross-correlation of foreground templates with the frequency maps. We estimate the electron temperature T_e from H$\alpha$ and free-free emission using two methods (temperature-temperature plot and cross-correlation) and we obtain T_e ranging from 3100 to 5200 K, for an effective fraction of absorbing dust along the line of sight of 30% (f_d=0.3). We estimate the frequency spectrum of the diffuse AME and we recover a peak frequency (in flux density units) of 25.5 \pm 1.5 GHz. We verify the reliability of this result with realistic simulations that include the presence of biases in the spectral model for the AME and in the free-free template. By combining physical models for vibrational and rotational dust emission and adding the constraints from the thermal dust spectrum from Planck and IRAS we are able to get a good description of the frequency spectrum of the AME for plausible values of the local density and radiation field.

U2 - 10.1051/0004-6361/201321160

DO - 10.1051/0004-6361/201321160

M3 - Journal article

SN - 0004-6361

VL - 557

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A53

ER -

Planck intermediate results. XII: Diffuse Galactic components in the Gould Belt System

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