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論文・著書情報
| タイトル |
| 和文: | |
| 英文: | Spectral Evolution of the GRB 030329 Afterglow: Detection of the Supernova Nebular Phase Emissions |
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| 著者 |
| 和文: |
Kosugi, G.,
Mizumoto, Y.,
河合 誠之,
Yoshida, A.,
Kawabata, K. S.,
Totani, T.,
Iye, M.,
Sekiguchi, K.,
Aoki, K.,
Ohyama, Y.,
Aoki, W.,
Kobayashi, N.,
Komiyama, Y.,
Noumaru, J.,
Ogasawara, R.,
Sakamoto, T.,
Shirasaki, Y.,
Takata, T.,
Tamagawa, T.,
Torii, K.,
Urata, Y.,
Watanabe, J.-I.,
Yamada, T.,
Qiu, Y..
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| 英文: |
Kosugi, G.,
Mizumoto, Y.,
Kawai, N.,
Yoshida, A.,
Kawabata, K. S.,
Totani, T.,
Iye, M.,
Sekiguchi, K.,
Aoki, K.,
Ohyama, Y.,
Aoki, W.,
Kobayashi, N.,
Komiyama, Y.,
Noumaru, J.,
Ogasawara, R.,
Sakamoto, T.,
Shirasaki, Y.,
Takata, T.,
Tamagawa, T.,
Torii, K.,
Urata, Y.,
Watanabe, J.-I.,
Yamada, T.,
Qiu, Y..
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| 言語 |
English |
| 掲載誌/書名 |
| 和文: | |
| 英文: | Publications of the Astronomical Society of Japan |
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巻, 号, ページ
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Vol. 56
pp. 61-68
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| 出版年月 |
2004年2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/10.1093/pasj/56.1.61 |
| アブストラクト |
GRB 030329 is the first Gamma-ray burst event for which a connection with a supernova (SN 2003dh) has been confirmed spectroscopically in its early phase. We present optical spectroscopy of this object 40 and 85 days after the burst (35 and 73 rest-frame days, respectively) obtained with the Subaru 8.2-m telescope. After subtracting the host galaxy template spectrum, the second-epoch spectrum shows nebular-phase emission lines emerging from the dominated photospheric-phase spectrum. The transition from the photospheric phase to the nebular phase has just started, or was slowly progressing at the time of our second-epoch observations. Our spectral analysis of the nebular-phase emission lines suggests that the explosion of the progenitor of the GRB 030329 was aspherical, and that the axis of an asphericity is well aligned to both the GRB relativistic jet and our line of sight. Although the decay index and the color evolution in the rest frame during our two epochs are very consistent with those of the Type Ic supernovae SN 1998bw and SN 1997ef, the nebular-phase lines emerged slightly earlier than in the case of these supernovae. These results infer that the most important factor that distinguishes SNe with GRB from SNe without GRB is the scale of the jet activity, or a viewing-angle effect, or both of them. |
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