表題番号:2020C-626 日付:2021/04/06
研究課題Search for a Combined Spectrum and Anisotropy Signature of the Vela SNR with CALET
研究者所属(当時) 資格 氏名
(代表者) 理工学術院 国際理工学センター(理工学術院) 准教授 モッツ ホルガー マルティン
研究成果概要
This project comprised the refinement of previous work on Dark Matter Search using  cosmic-ray spectra measured by CALET (electron+positron) and AMS-02 (positron-only), as well as in initial steps towards the goal of identifying a signature of the Vela SNR in CALET data.
The study of signatures from a flavor-dependent gauge-symmetry dark matter was updated, including among other items a comparison with current and future neutrino observations, concluded by publication in PRD and presentations in a JPS meeting and at the Kashiwa Dark Matter symposium.  
Concurrently, a method to study the emission of electron cosmic rays from the nearby Vela SNR quantitatively was developed. The expected spectrum from Vela is calculated, normalized to a total emission energy of 10^48 erg. By re-scaling this flux in a fit with a flexible background model, best fit interpretations and upper limits were derived, depending on parameters of the Vela SNR, as well as the cosmic-ray propagation conditions.
First results with this  method based on the spectrum published by the CALET collaboration in 2018 were presented at the annual JPS meeting. It was shown that CALET limits the emitted energy by Vela to within a factor four  from the proposed value of 10^48 erg.