论文标题
使用Kamland数据搜索超新星中微子和对银河恒星形成率的约束
Search for supernova neutrinos and constraint on the galactic star formation rate with the KamLAND data
论文作者
论文摘要
我们介绍了搜索核心偏离超新星中微子的结果，该中微子使用2002年3月9日至2020年4月25日的长期Kamland数据。我们关注从超新星发射的电子抗逆转录病毒，在1.8---111 MEV的能量范围内。 Supernovae将在Kamland Data中建立一个中微子事件集群，持续时间为$ \ sim $ 10。我们没有发现中微子簇，并且对超新星速率的上限为0.15 yr $^{ - 1} $，置信度为90％。可检测范围对应于> 95％的检测概率，对于核心偏转超新星和失败的核心 - 循环超新星的检测范围分别为40--59 kpc和65--81 kpc。本文提出，将中微子观测获得的超新星速率转换为银河恒星形成率。假设修改后的Salpeter-type初始质量函数，银河星形成速率的上限为<（17.5---22.7）$ M _ {\ odot} \ Mathrm {yr}^{ - 1} $，置信度为90％。
We present the results of a search for core-collapse supernova neutrinos, using long-term KamLAND data from 2002 March 9 to 2020 April 25. We focus on the electron antineutrinos emitted from supernovae in the energy range of 1.8--111 MeV. Supernovae will make a neutrino event cluster with the duration of $\sim$10 s in the KamLAND data. We find no neutrino clusters and give the upper limit on the supernova rate as to be 0.15 yr$^{-1}$ with a 90% confidence level. The detectable range, which corresponds to a >95% detection probability, is 40--59 kpc and 65--81 kpc for core-collapse supernovae and failed core-collapse supernovae, respectively. This paper proposes to convert the supernova rate obtained by the neutrino observation to the Galactic star formation rate. Assuming a modified Salpeter-type initial mass function, the upper limit on the Galactic star formation rate is <(17.5--22.7) $M_{\odot} \mathrm{yr}^{-1}$ with a 90% confidence level.
