I propose a new type of common envelope jets supernova (CEJSN) events where instead of a single neutron star (NS; or a black hole; BH) a tight binary system of an NS and a main-sequence star enters a common envelope evolution (CEE) with a red supergiant. The NS and the main-sequence star of the tight binary system merge inside the red supergiant envelope and enter a CEE of their own. The NS accretes some mass through an accretion disc and launches jets that explodes the main-sequence star. I estimate that the two jets that the NS launches at this phase carry an energy of $\approx 10^{52} {~\rm erg}$, about the same order of magnitude as the energy that the jets will carry when the NS or its BH remnant will enter the core in a later phase. For that, I term the entire event a double CEJSN. The outcome of the double CEJSN is a very long, months to years, and very energetic event, a total energy of $\approx 10^{52} \!-\! 10^{53} {~\rm erg}$, that will be observationally classified as a peculiar superenergetic event. I crudely estimate that new transient surveys should detect about one CEJSN event from a triple-star system per year.

中文翻译：

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三重星系统的双共包层喷流超新星（CEJSNe）

我提出了一种新型的普通包络射流超新星（CEJSN）事件，其中不是单个中子星（NS；或黑洞；BH），而是由 NS 和主序星组成的紧密双星系统进入共同包络演化（ CEE）与一颗红超巨星。NS 和致密双星系统的主序星在红超巨星包络内合并，进入它们自己的 CEE。NS 通过吸积盘吸积一些质量并发射喷射主序星爆炸。我估计 NS 在这个阶段发射的两架喷气机携带的能量为 $\约 10^{52} {~\rm erg}$，与 NS 时喷气机携带的能量大约相同的数量级或者它的 BH 残余将在稍后阶段进入核心。为此，我将整个活动称为双重 CEJSN。双CEJSN的结果很长，数月至数年，非常有活力的事件，总能量为 $\约 10^{52} \!-\! 10^{53} {~\rm erg}$，这将被观察归类为一个特殊的超高能事件。我粗略地估计，新的瞬态调查应该每年从一个三星级系统检测到大约一个 CEJSN 事件。