论文标题
$ j $ - 因成员/前景混合物模型的Draco，雕塑家和Ursa小矮人球形星系的估算
$J$-factor estimation of Draco, Sculptor and Ursa Minor dwarf spheroidal galaxies with the member/foreground mixture model
论文作者
论文摘要
矮球星系（DSPHS）是当前宇宙中寻找暗物质（DM）的间接检测实验的有希望的目标。为了稳健地预测DSPHS内DM歼灭中的信号通量量，DSPHS的DM分布以及$ J $ - 因子的精确确定尤其重要。在这项工作中，我们通过改进的统计方法估算了Draco，Sculptor和Ursa Minor DSPHS的内容，其中前景恒星和DSPH成员恒星同时考虑了。我们将该方法的似然函数定义为所谓的条件函数，以消除观察到的恒星数据的采样偏差。这种改进的方法使我们能够直接从观察到的恒星数据污染前景恒星污染的恒星数据中估计DM分布和$ J $ - 因素，而不会对测量的数量施加严格的会员标准。
Dwarf spheroidal galaxies (dSphs) are promising targets of indirect detection experiments searching for dark matter (DM) at present universe. Toward robust prediction for the amount of signal flux originating in DM annihilation inside dSphs, a precise determination of DM distributions as well as $J$-factors of the dSphs is particularly important. In this work, we estimate those of Draco, Sculptor, and Ursa Minor dSphs by an improved statistical method in which both foreground stars and dSph member stars are simultaneously taken into account. We define the likelihood function of the method as the so-called conditional one to remove sampling bias of observed stellar data. This improved method enables us to estimate DM distributions and $J$-factors of the dSphs directly from observed stellar data contaminated by foreground stars without imposing stringent membership criteria on the measured quantities.
