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The shallow-decay phase in both the optical and X-ray afterglows of Swift GRB 090529A: energy injection into a wind-type medium?статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Xin L.P., Pozanenko A., Kann D.A., Xu D., Gorosabel J., Leloudas G., Wei J.Y., Andreev M., Qin S.F., Ibrahimov M., Han X.H., A Ugarte Postigo, Qiu Y.L., Deng J.S., Volnova A., Jakobsson P., Castro-Tirado A.J., Aceituno F., U J.P., Wang J., Sanchez-Ramirez R., Kouprianov V., Zheng W.K., Tello J.C., Wu C.
- Журнал: Monthly Notices of the Royal Astronomical Society
- Том: 422
- Номер: 3
- Год издания: 2012
- Издательство: Oxford Journals, Oxford University Press
- Местоположение издательства: Oxford, UK, England
- Первая страница: 2044
- Последняя страница: 2050
- Аннотация: The energy injection model is the usual choice for interpreting the shallow-decay phase in Swift gamma-ray burst (GRB) X-ray afterglows. However, very few GRBs have simultaneous signatures of energy injection in their optical and X-ray afterglows. Here, we report on the optical observations of GRB 090529A from 2000 s to ˜106 s after the burst, in which an achromatic decay is seen at both wavelengths. The optical light curve shows a decay from 0.37 to 0.99, with a break at ˜105 s. In the same time interval, the decay indices of the X-ray light curve changed from 0.04 to 1.2. Comparing these values with the closure relations, the segment after 3 × 104 s is consistent with the prediction of the forward shock in an interstellar medium without any energy injection. The shallow-decay phase between 2000 and 3 × 104 s could be a result of the external shock in a wind-type medium with an energy injection under the condition of νo < νc < νx. However, the constraint of the spectral region is not consistent with the multiband observations. For this shallow-decay phase, other models are also possible, such as energy injection with evolving microphysical parameters, a jet viewed off-axis, etc.
- Добавил в систему: Вольнова Алина Александровна