奇特瞬变SCP 06 F6的银河系与河外起源
Galactic vs. Extragalactic Origin of the Peculiar Transient SCP 06F6
摘要：
我们研究了最近宣布的SCP 06F6瞬变事件的四种情况。其中一些先前曾作为SCP 06F6的合理模型进行过简要讨论，特别是声称在富碳包层的天鹅光谱中检测到z=0.143的宇宙学红移。我们在河外星系的情况下采用这个z值。我们不能排除这些模型中的任何一个，但可以将它们从最受欢迎到最不受欢迎排列。我们最喜欢的模型是中等质量黑洞（IMBH）对CO白矮星（WD）的潮汐破坏。为了解释SCP 06F6事件的性质，我们必须假设存在之前数值模拟中没有包括的强烈盘风。如果IMBH是星系的中心BH，这就解释了SCP 06F6方向没有检测到明亮星系的原因。我们第二喜欢的场景是一个类似Ia型的SN，它在碳星的密集风中爆炸。碳星是爆炸的WD的供体星。我们第三喜欢的模型是一颗小行星与WD相撞的银河系来源。这种情况在过去曾被讨论为WD周围尘埃盘的来源，但没有关于这种事件出现的预测。我们最不喜欢的模型是核心坍缩SN。我们能够解释SCP 06F6的性质与核心坍缩SN的唯一方法是假设发生了一种罕见的二元相互作用。
英文摘要：
We study four scenarios for the SCP 06F6 transient event that was announced recently. Some of these were previously briefly discussed as plausible models for SCP 06F6, in particular with the claimed detection of a z=0.143 cosmological redshift of a Swan spectrum of a carbon rich envelope. We adopt this value of z for extragalactic scenarios. We cannot rule out any of these models, but can rank them from most to least preferred. Our favorite model is a tidal disruption of a CO white dwarf (WD) by an intermediate-mass black hole (IMBH). To account for the properties of the SCP 06F6 event, we have to assume the presence of a strong disk wind that was not included in previous numerical simulations. If the IMBH is the central BH of a galaxy, this explains the non detection of a bright galaxy in the direction of SCP 06F6. Our second favorite scenario is a type Ia-like SN that exploded inside the dense wind of a carbon star. The carbon star is the donor star of the exploded WD. Our third favorite model is a Galactic source of an asteroid that collided with a WD. Such a scenario was discussed in the past as the source of dusty disks around WDs, but no predictions exist regarding the appearance of such an event. Our least favorite model is of a core collapse SN. The only way we can account for the properties of SCP 06F6 with a core collapse SN is if we assume the occurrence of a rare type of binary interaction.
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