Planck intermediate results XII.: Diffuse galactic components in the gould belt system

P. A.R. Ade; N. Aghanim; M. I.R. 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; R. C. Butler; P. Cabella; J. F. Cardoso; Xianfu Chen; L. Y. Chiang; P. R. Christensen; D. L. Clements; S. Colombi; L. P.L. Colombo; A. Coulais; F. Cuttaia; R. D. Davies; R. J. 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; S. R. Hildebrandt; E. Hivon; M. Hobson; W. A. Holmes; A. 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; M. 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; J. A. Murphy; P. Naselsky; F. Nati; P. Natoli; H. U. Nørgaard-Nielsen; F. Noviello; D. Novikov; I. Novikov; S. Osborne; C. A. 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; Jussi Varis; P. Vielva; F. 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

P. A.R. Ade, N. Aghanim, M. I.R. 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. BondJ. Borrill, F. R. Bouchet, F. Boulanger, C. Burigana, R. C. Butler, P. Cabella, J. F. Cardoso, Xianfu Chen, L. Y. Chiang, P. R. Christensen, D. L. Clements, S. Colombi, L. P.L. Colombo, A. Coulais, F. Cuttaia, R. D. Davies, R. J. 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, S. R. Hildebrandt, E. Hivon, M. Hobson, W. A. Holmes, A. 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, M. 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, J. A. Murphy, P. Naselsky, F. Nati, P. Natoli, H. U. Nørgaard-Nielsen, F. Noviello, D. Novikov, I. Novikov, S. Osborne, C. A. 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, Jussi Varis, P. Vielva, F. Villa, N. Vittorio, L. A. Wade, B. D. Wandelt, N. Ysard, D. Yvon, A. Zacchei, A. Zonca

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

3 Citations (Scopus)

Abstract

We perform an analysis of the diffuse low-frequency Galactic components in the southern part of the Gould Belt system (130° ≤ l ≤ 230° and −50° ≤ b ≤ −10°). Strong ultra-violet 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 (ν < 40 GHz), while synchrotron emission is very smooth and faint. We separated 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 compared our results with the results of cross-correlation of foreground templates with the frequency maps. We estimated the electron temperature T_e from Hα and free-free emission using two methods (temperature-temperature plot and cross-correlation) and obtained T_e ranging from 3100 to 5200K for an effective fraction of absorbing dust along the line of sight of 30% (f_d = 0.3). We estimated the frequency spectrum of the diffuse AME and recovered a peak frequency (in flux density units) of 25.5 ± 1.5 GHz. We verified the reliability of this result with realistic simulations that include 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 present a good description of the AME frequency spectrum for plausible values of the local density and radiation field.

Original language	English
Article number	A53
Journal	Astronomy and Astrophysics
Volume	557
DOIs	https://doi.org/10.1051/0004-6361/201321160
Publication status	Published - 13 Sept 2013
MoE publication type	A1 Journal article-refereed

Keywords

Galaxy: general
Radiation mechanisms: general
Radio continuum: ISM

Access to Document

10.1051/0004-6361/201321160

Cite this

Ade, P. A. R., Aghanim, N., Alves, M. I. R., 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., Bonaldi, A., ... 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{1acd263a10154d15a4e8970eaf236340,

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° ≤ l ≤ 230° and −50° ≤ b ≤ −10°). Strong ultra-violet 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 (ν < 40 GHz), while synchrotron emission is very smooth and faint. We separated 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 compared our results with the results of cross-correlation of foreground templates with the frequency maps. We estimated the electron temperature Te from Hα and free-free emission using two methods (temperature-temperature plot and cross-correlation) and obtained Te ranging from 3100 to 5200K for an effective fraction of absorbing dust along the line of sight of 30% (fd = 0.3). We estimated the frequency spectrum of the diffuse AME and recovered a peak frequency (in flux density units) of 25.5 ± 1.5 GHz. We verified the reliability of this result with realistic simulations that include 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 present a good description of the AME frequency spectrum for plausible values of the local density and radiation field.",

keywords = "Galaxy: general, Radiation mechanisms: general, Radio continuum: ISM",

author = "Ade, {P. A.R.} and N. Aghanim and Alves, {M. I.R.} 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 Butler, {R. C.} and P. Cabella and Cardoso, {J. F.} and Xianfu Chen and Chiang, {L. Y.} 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 Davis, {R. J.} 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 Hildebrandt, {S. R.} and E. Hivon and M. Hobson and Holmes, {W. A.} and A. 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 M. 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 Murphy, {J. A.} and P. Naselsky and F. Nati and P. Natoli and N{\o}rgaard-Nielsen, {H. U.} and F. Noviello and D. Novikov and I. Novikov and S. Osborne and Oxborrow, {C. A.} 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 Jussi Varis and P. Vielva and F. 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",

month = sep,

day = "13",

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

language = "English",

volume = "557",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Ade, PAR, Aghanim, N, Alves, MIR, 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, JP, Bersanelli, M, Bonaldi, A, Bond, JR, Borrill, J, Bouchet, FR, Boulanger, F, Burigana, C, Butler, RC, Cabella, P, Cardoso, JF, Chen, X, Chiang, LY, Christensen, PR, Clements, DL, Colombi, S, Colombo, LPL, Coulais, A, Cuttaia, F, Davies, RD, Davis, RJ, 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, SR, 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, JM, 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, MA, Moneti, A, Montier, L, Morgante, G, Mortlock, D, Munshi, D, Murphy, JA, Naselsky, P, Nati, F, Natoli, P, Nørgaard-Nielsen, HU, Noviello, F, Novikov, D, Novikov, I, 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, JL, 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, AS, Sygnet, JF, 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.

T2 - Diffuse galactic components in the gould belt system

AU - Ade, P. A.R.

AU - Aghanim, N.

AU - Alves, M. I.R.

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, R. C.

AU - Cabella, P.

AU - Cardoso, J. F.

AU - Chen, Xianfu

AU - Chiang, L. Y.

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, R. J.

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, S. R.

AU - Hivon, E.

AU - Hobson, M.

AU - Holmes, W. A.

AU - Hornstrup, A.

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, M.

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, J. A.

AU - Naselsky, P.

AU - Nati, F.

AU - Natoli, P.

AU - Nørgaard-Nielsen, H. U.

AU - Noviello, F.

AU - Novikov, D.

AU - Novikov, I.

AU - Osborne, S.

AU - Oxborrow, C. A.

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, Jussi

AU - Vielva, P.

AU - Villa, F.

AU - Vittorio, N.

AU - Wade, L. A.

AU - Wandelt, B. D.

AU - Ysard, N.

AU - Yvon, D.

AU - Zacchei, A.

AU - Zonca, A.

PY - 2013/9/13

Y1 - 2013/9/13

N2 - We perform an analysis of the diffuse low-frequency Galactic components in the southern part of the Gould Belt system (130° ≤ l ≤ 230° and −50° ≤ b ≤ −10°). Strong ultra-violet 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 (ν < 40 GHz), while synchrotron emission is very smooth and faint. We separated 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 compared our results with the results of cross-correlation of foreground templates with the frequency maps. We estimated the electron temperature Te from Hα and free-free emission using two methods (temperature-temperature plot and cross-correlation) and obtained Te ranging from 3100 to 5200K for an effective fraction of absorbing dust along the line of sight of 30% (fd = 0.3). We estimated the frequency spectrum of the diffuse AME and recovered a peak frequency (in flux density units) of 25.5 ± 1.5 GHz. We verified the reliability of this result with realistic simulations that include 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 present a good description of the AME frequency spectrum 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° ≤ l ≤ 230° and −50° ≤ b ≤ −10°). Strong ultra-violet 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 (ν < 40 GHz), while synchrotron emission is very smooth and faint. We separated 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 compared our results with the results of cross-correlation of foreground templates with the frequency maps. We estimated the electron temperature Te from Hα and free-free emission using two methods (temperature-temperature plot and cross-correlation) and obtained Te ranging from 3100 to 5200K for an effective fraction of absorbing dust along the line of sight of 30% (fd = 0.3). We estimated the frequency spectrum of the diffuse AME and recovered a peak frequency (in flux density units) of 25.5 ± 1.5 GHz. We verified the reliability of this result with realistic simulations that include 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 present a good description of the AME frequency spectrum for plausible values of the local density and radiation field.

KW - Galaxy: general

KW - Radiation mechanisms: general

KW - Radio continuum: ISM

UR - http://www.scopus.com/inward/record.url?scp=84883612869&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201321160

DO - 10.1051/0004-6361/201321160

M3 - Article

AN - SCOPUS:84883612869

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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