磁星驱动的喷流-风外流在伽马射线暴相关超新星中的应用：对GRB 060218-SN 2006aj热成分的研究
A magnetar-powered jet-wind outflow in gamma-ray burst-associated supernovae: Application to the thermal components of GRB 060218-SN 2006aj
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中文总结 AI 辅助
本研究提出磁星驱动的喷流-风双成分模型，成功解释GRB 060218-SN 2006aj的软X射线黑体辐射与双峰紫外/光学光变曲线，揭示同一中心引擎通过不同能量注入通道产生多波段热辐射。
中文摘要 AI 辅助
大质量恒星坍缩过程中形成的快速旋转磁星，可能通过准直的极向喷流和准各向同性的磁星风释放其自转能。GRB 060218-SN 2006aj具有持久的软X射线黑体成分和双峰紫外/光学光变曲线，为这种双成分能量注入情景提供了有用的检验案例。我们开发了一个磁星驱动的喷流-风模型，其中两种外流与同源膨胀的超新星抛射物相互作用，驱动前向激波，产生激波突破辐射以及随后的磁星动力热辐射。我们首先利用喷流成分拟合GRB 060218的0.3-10 keV黑体通量和温度演化，随后加入风成分来模拟SN 2006aj的紫外/光学光变曲线。我们发现，软X射线黑体成分主要由喷流驱动的极向抛射物的激波突破辐射再现。而双峰紫外/光学光变曲线则由准各向同性磁星风与更庞大的抛射物成分之间的相互作用产生。第一个光学峰以风驱动的激波突破辐射为主，而更宽更晚的发射则主要由随后的磁星动力热成分提供能量。我们的结果表明，GRB 060218-SN 2006aj存在一个双成分磁星引擎图景，其中X射线热辐射和紫外/光学双峰演化源于同一中心引擎的不同能量注入通道。
英文摘要
A rapidly rotating magnetar formed in the collapse of a massive star may release its spin-down power through both a collimated polar jet and a quasi-isotropic magnetar wind. With its long-lasting soft X-ray blackbody component and the double-peaked UV/optical light curves of SN 2006aj, GRB 060218-SN 2006aj provides a useful test case for such a two-component energy-injection scenario. We developed a magnetar-powered jet-wind model in which the two outflows interact with homologously expanding SN ejecta, driving forward shocks that produce shock-breakout emission and subsequent magnetar-powered thermal emission. We first used the jet component to fit the 0.3-10 keV blackbody flux and temperature evolution of GRB 060218 and subsequently added the wind component to model the UV/optical light curves of SN 2006aj. We find that the soft X-ray blackbody component can be reproduced mainly by shock-breakout emission from the polar ejecta driven by the jet. The double-peaked UV/optical light curves are instead produced by the interaction between the quasi-isotropic magnetar wind and a more massive ejecta component. The first optical peak is dominated by wind-driven shock-breakout emission, whereas the broader and later emission is powered mainly by the subsequent magnetar-powered thermal component. Our results suggest a two-component magnetar-engine picture for GRB 060218-SN 2006aj, in which the X-ray thermal emission and the UV/optical double-peaked evolution arise from different energy-injection channels of the same central engine.
发表机构
- Guangxi University（广西大学）
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