資料載入中.....
|
請使用永久網址來引用或連結此文件:
https://ir.lib.ncu.edu.tw/handle/987654321/100808
|
| 題名: | Multi-wavelength observations of blazar AO 0235+164 in the 2008-2009 flaring state |
| 作者: | 陳文屏;Ackermann, M.;Bastieri, D.;Bloom, E. D.;Bonamente, E.;Borgland, A. W.;Bregeon, J.;Cameron, R. A.;Caraveo, P. A.;Casandjian, J. M.;Charles, E.;Chiang, J.;Cohen-Tanugi, J.;Cutini, S.;D'Ammando, F.;de Palma, F.;Dermer, C. D.;Drlica-Wagner, A.;Dubois, R.;Favuzzi, C.;Fegan, S. J.;Fuhrmann, L.;Fukazawa, Y.;Gargano, F.;Giommi, P.;Giordano, F.;Giroletti, M.;Glanzman, T.;Godfrey, G.;Guiriec, S.;Hadasch, D.;Katagiri, H.;Kataoka, J.;Knödlseder, J.;Lott, B.;Lovellette, M. N.;Madejski, G. M.;Mazziotta, M. N.;Mehault, J.;Michelson, P. F.;Morselli, A.;Moskalenko, I. V.;Murgia, S.;Naumann-Godo, M.;Norris, J. P.;Paneque, D.;Pesce-Rollins, M.;Porter, T. A.;Rainò, S.;Rastawicki, D.;Razzano, M.;Readhead, A.;Reimer, O.;Sbarra, C.;Sgrò, C.;Takahashi, H.;Tanaka, T.;Thayer, J. G.;Thayer, J. B.;Torres, D. F.;Troja, E.;Vandenbroucke, J.;Vitale, V.;Waite, A. P.;Winer, B. L.;Moderski, R.;Sikora, M.;Villata, M.;Raiteri, C. M.;Aller, M. F.;Berdyugin, A.;Blinov, D. A.;Bravo Calle, O. J. A.;Efimova, N. V.;Gurwell, M. A.;Hiriart, D.;Jordan, B.;Kopatskaya, E. N.;Lähteenmäki, A.;Larionova, E. G.;Morozova, D. A.;Nikolashvili, M. G.;Sigua, L. A.;Sillanpää, A.;Tornikoski, M.;Troitsky, I. S.;Umana, G.;Krichbaum, T. P.;Nestoras, I.;Riquelme, D.;Arai, A.;Kawabata, K. S.;Sakimoto, K.;Sato, S.;Yoshida, M.;Belloni, T.;Bonning, E. W.;Isler, J.;Urry, C. M.;Falcone, A.;Stroh, M. |
| 貢獻者: | 理學院天文研究所 |
| 關鍵詞: | Astronomy;Astrophysics;BL Lacertae objects: individual (AO 0235+164);Blazars;Broadband;Earth, ocean, space;Emission;Exact sciences and technology;Flares;galaxies: active;galaxies: jets;gamma rays: galaxies;High Energy Astrophysical Phenomena;Launches;Light curve;Optical polarization;Physics;radiation mechanisms: non-thermal;Sciences of the Universe;Spectral energy distribution |
| 日期: | 2012-06-01 |
| 上傳時間: | 2026-04-21 14:14:56 (UTC+8) |
| 出版者: | IOP Publishing Ltd.;Bristol: IOP |
| 摘要: | 摘要： The blazar AO 0235+164 (z = 0.94) has been one of the most active objects observed by Fermi Large Area Telescope (LAT) since its launch in Summer 2008. In addition to the continuous coverage by Fermi, contemporaneous observations were carried out from the radio to gamma -ray bands between 2008 September and 2009 February. In this paper, we summarize the rich multi-wavelength data collected during the campaign (including F-GAMMA, GASPWEBT, Kanata, OVRO, RXTE, SMARTS, Swift, and other instruments), examine the cross-correlation between the light curves measured in the different energy bands, and interpret the resulting spectral energy distributions in the context of well-known blazar emission models. We find that the gamma -ray activity is well correlated with a series of near-IR/optical flares, accompanied by an increase in the optical polarization degree. On the other hand, the X-ray light curve shows a distinct 20 day high state of unusually soft spectrum, which does not match the extrapolation of the optical/UV synchrotron spectrum. We tentatively interpret this feature as the bulk Compton emission by cold electrons contained in the jet, which requires an accretion disk corona with an effective covering factor of 19% at a distance of 100 R sub(g). We model the broadband spectra with a leptonic model with external radiation dominated by the infrared emission from the dusty torus.
出版者： Bristol: IOP
出版日期： 2012-06-01
出處： The Astrophysical journal, 2012-06, Vol.751 (2), p.159-20
資源來源： IoP Science journals
版權： 2015 INIST-CNRS
版權： CC0 1.0 - Universal
識別號： ISSN: 0004-637X
識別號： ISSN: 1538-4357
識別號： EISSN: 1538-4357
識別號： DOI: 10.1088/0004-637X/751/2/159
識別號： CODEN: ASJOAB |
| 顯示於類別: | [天文研究所] 期刊論文
|
文件中的檔案:
| 檔案 |
描述 |
大小 | 格式 | 瀏覽次數 |
|---|
| index.html | | 0Kb | HTML | 19 | 檢視/開啟 |
|
在NCUIR中所有的資料項目都受到原著作權保護.
|
