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    Planck intermediate results XLV. Radio spectra of northern extragalactic radio sources


    Ade, P.A.R., Aghanim, N., Aller, H.D., Aller, M.F., Arnaud, M., Aumont, J., Baccigalupi, C., Banday, A.J., Barreiro, R.B., Bartolo, N., Battaner, E., Benabed, K., Benoit-Lévy, A., Bernard, J.-P., Bersanelli, M., Bielewicz, P., Bonaldi, A., Bonavera, L., Bond, J.R., Borrill, J., Bouchet, F.R., Burigana, C., Calabrese, E., Catalano, A., Chiang, H.C., Christensen, P.R., Clements, D.L., Colombi, S., Couchot, F., Crill, B.P., Curto, A., Cuttaia, F., Danese, L., Davies, R.D., Davis, R.J., De Bernardis, P., de Rosa, A., de Zotti, G., Delabrouille, J., Dickinson, C., Diego, J.M., Dole, H., Donzelli, S., Dore, O., Ducout, A., Dupac, X., Efstathiou, G., Elsner, F., Eriksen, H.K., Finelli, F., Forni, O., Frailis, M., Fraisse, A.A., Franceschi, E., Galeotta, S., Galli, S., Ganga, K., Giard, M., Giraud-Héraud, Y., Gjerløw, E., Gonzalez-Nuevo, J., Gorski, K.M., Gruppuso, A., Gurwell, A., Hansen, F.K., Harrison, D., Henrot-Versille, S., Hernandez-Monteagudo, C., Hildebrandt, S.R., Hobson, M., Hornstrup, A., Hovatta, T., Hovest, W., Huffenberger, K.M., Hurier, G., Jaffe, A.H., Jaffe, T.R., Järvelä, E., Keihanen, E., Keskitalo, R., Kisner, T.S., Kneissl, R., Knoche, J., Kunz, M., Kurki-Suonio, H., Lahteenmaki, A., Lamarre, J.-M., Lasenby, A., Lattanzi, M., Lawrence, C.R., Leonardi, R., Levrier, F., Liguori, M., Lilje, P.B., Linden-Vornle, M., Lopez-Caniego, M., Lubin, P.M., Macias-Perez, J.F., Maffei, B., Maino, D., Mandolesi, N., Maris, M., Martin, P.G., Martinez-Gonzalez, E., Masi, S., Matarrese, S., Max-Moerbeck, W., Meinhold, P.R., Melchiorri, A., Mennella, A., Migliaccio, M., Mingaliev, M., Miville-Deschenes, M.-A., Moneti, A., Montier, L., Morgante, G., Mortlock, D., Munshi, D., Murphy, J.Anthony, Nati, F., Natoli, P., Nieppola, K., Noviello, F., Novikov, D., Novikov, I., Pagano, L., Pajot, F., Paoletti, D., Partridge, B., Pasian, F., Pearson, T.J., Perdereau, O., Perotto, L., Pettorino, V., Piacentini, F., Piat, M., Pierpaoli, E., Plaszczynski, S., Pointecouteau, E., Polenta, G., Pratt, G.W., Ramakrishnan, V., Rastorgueva-Foi, E.A., Readhead, A., Reinecke, M., Remazeilles, M., Renault, C., Renzi, A., Richards, J.L., Ristorcelli, I., Rocha, G., Rossetti, M., Roudier, G., Rubino-Martin, J.A., Rusholme, B., Sandri, M., Savelainen, M., Savini, G., Scott, D., Sotnikova, Y., Stolyarov, V., Sunyaev, R., Sutton, D., Suur-Uski, A.-S., Sygnet, J.-F., Tammi, J., Tauber, J.A., Terenzi, L., Toffolatti, L., Tomasi, M., Tornikoski, M., Tristram, M., Tucci, M., Turler, M., Valenziano, L., Valiviita, J., Valtaoja, E., Van Tent, B., Vielva, P., Villa, F., Wade, L.A., Wehrle, A.E., Wehus, I., Yvon, D., Zacchei, A. and Zonca, A. (2016) Planck intermediate results XLV. Radio spectra of northern extragalactic radio sources. Astronomy & Astrophysics, 596 (A106). ISSN 0004-6361

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    Abstract

    Continuum spectra covering centimetre to submillimetre wavelengths are presented for a northern sample of 104 extragalactic radio sources, mainly active galactic nuclei, based on four-epoch Planck data. The nine Planck frequencies, from 30 to 857 GHz, are complemented by a set of simultaneous ground-based radio observations between 1.1 and 37 GHz. The single-survey Planck data confirm that the flattest high-frequency radio spectral indices are close to zero, indicating that the original accelerated electron energy spectrum is much harder than commonly thought, with power-law index around 1.5 instead of the canonical 2.5. The radio spectra peak at high frequencies and exhibit a variety of shapes. For a small set of low-z sources, we find a spectral upturn at high frequencies, indicating the presence of intrinsic cold dust. Variability can generally be approximated by achromatic variations, while sources with clear signatures of evolving shocks appear to be limited to the strongest outbursts.
    Item Type: Article
    Keywords: Planck Collaboration; galaxies: active; galaxies: general; radio continuum: galaxies;
    Academic Unit: Faculty of Science and Engineering > Experimental Physics
    Item ID: 14306
    Identification Number: 10.1051/0004-6361/201527780
    Depositing User: Dr. Anthony Murphy
    Date Deposited: 07 Apr 2021 15:48
    Journal or Publication Title: Astronomy & Astrophysics
    Publisher: EDP Sciences
    Refereed: Yes
    Related URLs:
    URI: https://mural.maynoothuniversity.ie/id/eprint/14306
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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