标题： 白矮星-中子星或白矮星-黑洞合并中的重复部分中断调制了长持续时间合并型伽马射线暴的瞬时辐射 显示英文标题

标题： Repeated partial disruptions in a WD-NS or WD-BH merger modulate the prompt emission of long-duration merger-type GRBs

摘要： 伽玛射线暴（GRBs）的前身天体长期以来一直是一个未解的问题。GRB 230703A突出表现为一个异常明亮的事件，属于长时持续的GRBs，但也表现出类似千新星的晚期辐射成分。与类似的事件GRBs 060614和211211A一起，它们构成了一个具有引人入胜的前身天体的新GRBs子类。如果这种长时持续的合并型GRBs起源于白矮星（WD）与中子星（NS）或黑洞（BH）的合并，如最近文献中所提出的，那么WD较大的潮汐破坏半径以及不可忽略的剩余轨道偏心率将使重复的部分潮汐破坏成为不可避免的结果。这可能会调节NS或BH的质量吸积和喷流发射过程，在轨道周期上产生准周期调制（QPM）。在这些三个GRBs的早期瞬发辐射阶段检测到潜在的QPM支持了这一情景，相对较慢的QPM（$>$1 s）表明较轻的物体不可能是NS。我们提出GRBs 230307A、060614和211211A的前身系统分别由质量为1.3$M_\odot$、0.9$M_\odot$和1.4$M_\odot$的WD和一个NS（或BH）组成。经过多次调制周期后，WD被完全破坏，剩余碎片的吸积主导了扩展辐射阶段。 显示英文摘要

摘要： The progenitors of gamma-ray bursts (GRBs) have long been an unresolved issue. GRB 230703A stands out as an exceptionally bright event, belonging to the long-duration GRBs but also exhibiting a late emission component reminiscent of a kilonova. Together with the similar events GRBs 060614 and 211211A, they make up a new sub-group of GRBs with intriguing progenitors. If such long-duration merger-type GRBs originated from the coalescence of a white dwarf (WD) with a neutron star (NS) or a black hole (BH), as proposed in the recent literature, then the larger tidal disruption radius of the WD, together with a non-negligible residual orbital eccentricity, would make repeated partial tidal disruptions inevitable. This may modulate the mass accretion and jet launching process at the NS or BH, resulting in a quasi-periodic modulation (QPM) in the light curve of the GRB, on the orbital period. The detection of potential QPMs during the early episode of prompt emission of these three GRBs supports this scenario, and the relatively slow QPM ($>$ 1 s) suggests that the lighter object can not be a NS. We propose that the progenitor system of GRBs 230307A, 060614, and 211211A consist of a WD of mass 1.3 $M_\odot$, 0.9 $M_\odot$ and 1.4 $M_\odot$, respectively, and a NS (or BH). After several cycles of modulations, the WD is completely destructed, and the accretion of the remaining debris dominates the extended emission episode.