The Rate of iPTF 14gqr like Ultra-stripped Supernovae and Binary Evolution Leading to Double Neutron Star Formation
The Rate of iPTF 14gqr like Ultra-stripped Supernovae and Binary Evolution Leading to Double Neutron Star Formation
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DOI：
10.3847/1538-4357/ab321c
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发表时间：
2019-03
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影响因子：
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通讯作者：
K. Hijikawa;T. Kinugawa;T. Yoshida;H. Umeda
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文献类型：
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作者：
K. Hijikawa;T. Kinugawa;T. Yoshida;H. Umeda
双中子星星（DNS）系统是由大质量双星产生的。一颗极度剥离的星星的超新星（SN）爆炸预计将发生在DNS形成的最后阶段。这种类型的SN被称为超剥离SN（USSN）。最近的研究表明，Ic型SN iPTF 14 gqr（SN 2014 ft）的喷出物质量较低（≈0.2 M⊙），其前身有质量为0.01 M⊙的氦包层。这个SN被解释为USSN，因此这是第一次发现USSN。此外，对iPTF 14gqr的观测为我们提供了一些关于其形成历史的信息。在这里，我们进行快速的人口合成计算，以估计检测率的iPTF 14gqr像USSNe与光学瞬态调查：中间帕洛玛瞬态工厂（iPTF），Zwicky瞬态设施（ZTF），和大型综合巡天望远镜（LSST）。我们发现iPTF、ZTF和LSST可以分别以0.3、10和1年的速率观测到iPTF 14gqr，就像USSNe一样。在4年的观测中，iPTF能探测到1个类似USSN的iPTF 14gqr。我们还研究了质量损失效率的影响，在罗奇瓣溢流形成通道。
Double neutron star (DNS) systems are produced from massive binaries. A supernova (SN) explosion of an extremely stripped star is expected to occur at the final stage of DNS formation. This type of SN is called an ultra-stripped SN (USSN). Recent research revealed that a type Ic SN, iPTF 14gqr (SN 2014ft), has low ejecta mass (≈0.2 M⊙) and its progenitor has a helium envelope with mass ∼0.01 M⊙. This SN is interpreted as a USSN, and thus this is the first discovery of a USSN. Furthermore, the observation of iPTF 14gqr provides us with some information about its formation history. Here, we perform rapid population synthesis calculations so as to estimate the detection rate of iPTF 14gqr like USSNe with optical transient surveys: the intermediate Palomar Transient Factory (iPTF), the Zwicky Transient Facility (ZTF), and the Large Synoptic Survey Telescope (LSST). We find that iPTF, ZTF, and LSST can observe iPTF 14gqr like USSNe at rates of 0.3, 10, and 1 yr−1, respectively. The iPTF can detect 1 iPTF 14gqr like USSN during its four year observation. We also investigate effects of mass-loss efficiency during Roche-lobe overflow on formation channels.