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Planck early results. XV. Spectral energy distributions and radio continuum spectra of northern extragalactic radio sources
文献类型：期刊论文
| 作者 | Aatrokoski, J.1; Ade, P. A. R.82; Aghanim, N.53; Aller, H. D.4; Aller, M. F.4; Angelakis, E.76; Arnaud, M.69; Ashdown, M.7,66; Aumont, J.53; Baccigalupi, C.80 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2011-12-01 |
| 卷号 | 536 |
| 关键词 | galaxies: active BL Lacertae objects: general quasars: general radiation mechanisms: non-thermal |
| 英文摘要 | Spectral energy distributions (SEDs) and radio continuum spectra are presented for a northern sample of 104 extragalactic radio sources, based on the Planck Early Release Compact Source Catalogue (ERCSC) and simultaneous multifrequency data. The nine Planck frequencies, from 30 to 857 GHz, are complemented by a set of simultaneous observations ranging from radio to gamma-rays. This is the first extensive frequency coverage in the radio and millimetre domains for an essentially complete sample of extragalactic radio sources, and it shows how the individual shocks, each in their own phase of development, shape the radio spectra as they move in the relativistic jet. The SEDs presented in this paper were fitted with second and third degree polynomials to estimate the frequencies of the synchrotron and inverse Compton (IC) peaks, and the spectral indices of low and high frequency radio data, including the Planck ERCSC data, were calculated. SED modelling methods are discussed, with an emphasis on proper, physical modelling of the synchrotron bump using multiple components. Planck ERCSC data also suggest that the original accelerated electron energy spectrum could be much harder than commonly thought, with power-law index around 1.5 instead of the canonical 2.5. The implications of this are discussed for the acceleration mechanisms effective in blazar shocks. Furthermore in many cases the Planck data indicate that gamma-ray emission must originate in the same shocks that produce the radio emission. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000298485100016 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7981]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Aalto Univ, Metsahovi Radio Observ, Kylmala 02540, Finland 2.ESRIN, Agenzia Spaziale Italiana Sci Data Ctr, Frascati, Italy 3.Agenzia Spaziale Italiana, Rome, Italy 4.Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA 5.NASA, Goddard Space Flight Ctr, Astroparticle Phys Lab, Greenbelt, MD 20771 USA 6.Univ Paris 07, CNRS, UMR7164, Paris, France 7.Univ Cambridge, Cavendish Lab, Astrophys Grp, Cambridge CB3 0HE, England 8.ALMA Santiago Cent Off, Santiago 0355, Chile 9.CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia 10.Univ Toronto, CITA, Toronto, ON M5S 3H8, Canada |
| 推荐引用方式 GB/T 7714 | Aatrokoski, J.,Ade, P. A. R.,Aghanim, N.,et al. Planck early results. XV. Spectral energy distributions and radio continuum spectra of northern extragalactic radio sources[J]. ASTRONOMY & ASTROPHYSICS,2011,536. |
| APA | Aatrokoski, J..,Ade, P. A. R..,Aghanim, N..,Aller, H. D..,Aller, M. F..,...&Planck Collaboration.(2011).Planck early results. XV. Spectral energy distributions and radio continuum spectra of northern extragalactic radio sources.ASTRONOMY & ASTROPHYSICS,536. |
| MLA | Aatrokoski, J.,et al."Planck early results. XV. Spectral energy distributions and radio continuum spectra of northern extragalactic radio sources".ASTRONOMY & ASTROPHYSICS 536(2011). |
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来源：国家天文台
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