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論文・著書情報
| タイトル |
| 和文: | |
| 英文: | On the jet structure and magnetic field configuration of GRB 020813 |
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| 著者 |
| 和文: |
Lazzati, D.,
Covino, S.,
Gorosabel, J.,
Rossi, E.,
Ghisellini, G.,
Rol, E.,
Castro Cerón, J. M.,
Castro-Tirado, A. J.,
Della Valle, M.,
di Serego Alighieri, S.,
Fruchter, A. S.,
Fynbo, J. P. U.,
Goldoni, P.,
Hjorth, J.,
Israel, G. L.,
Kaper, L.,
河合 誠之,
Le Floc'h, E.,
Malesani, D.,
Masetti, N.,
Mazzali, P.,
Mirabel, F.,
Moller, P.,
Ortolani, S.,
Palazzi, E.,
Pian, E.,
Rhoads, J.,
Ricker, G.,
Salmonson, J. D.,
Stella, L.,
Tagliaferri, G.,
Tanvir, N.,
van den Heuvel, E.,
Wijers, R. A. M. J.,
Zerbi, F. M..
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| 英文: |
Lazzati, D.,
Covino, S.,
Gorosabel, J.,
Rossi, E.,
Ghisellini, G.,
Rol, E.,
Castro Cerón, J. M.,
Castro-Tirado, A. J.,
Della Valle, M.,
di Serego Alighieri, S.,
Fruchter, A. S.,
Fynbo, J. P. U.,
Goldoni, P.,
Hjorth, J.,
Israel, G. L.,
Kaper, L.,
Kawai, N.,
Le Floc'h, E.,
Malesani, D.,
Masetti, N.,
Mazzali, P.,
Mirabel, F.,
Moller, P.,
Ortolani, S.,
Palazzi, E.,
Pian, E.,
Rhoads, J.,
Ricker, G.,
Salmonson, J. D.,
Stella, L.,
Tagliaferri, G.,
Tanvir, N.,
van den Heuvel, E.,
Wijers, R. A. M. J.,
Zerbi, F. M..
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| 言語 |
English |
| 掲載誌/書名 |
| 和文: | |
| 英文: | Astronomy and Astrophysics |
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巻, 号, ページ
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Vol. 422
pp. 121-128
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| 出版年月 |
2004年7月 |
| 出版者 |
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| 会議名称 |
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| 開催地 |
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| DOI |
https://doi.org/10.1051/0004-6361:20035951 |
| アブストラクト |
The polarization curve of GRB 020813 is discussed and compared to different models for the structure, evolution and magnetisation properties of the jet and the interstellar medium onto which the fireball impacts. GRB 020813 is best suited for this kind of analysis for the smoothness of its afterglow light curve, ensuring the applicability of current models. The polarization dataset allows us to rule out the standard GRB jet, in which the energy and Lorentz factor have a well defined value inside the jet opening angle and the magnetic field is generated at the shock front. We explore alternative models finding that a structured jet or a jet with a toroidal component of the magnetic field can fit equally well the polarization curve. Stronger conclusions cannot be drawn due to the incomplete sampling of the polarization curve. A more dense sampling, especially at early times, is required to pin down the structure of the jet and the geometry of its magnetic field. Based on observations collected at the European Southern Observatory, Cerro Paranal (Chile), ESO programmes 69.D-0461(A) and 69.D-0701(A). |
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