Milky Way SNII和PAMELA异常中的平均不均匀性
Average Inhomogeneities in Milky Way SNII and The PAMELA Anomaly
摘要：
提出了一个模型来估计超新星II型事件（SNII）的分数发生内部与外部的螺旋臂为一个给定的恒星形成插曲。给出了该分数的概率分布函数（PDF），用于类似于Sznov等人的模型。[13][11]。计算出的SNII分数的PDF，SNII_{in/total}，定义为一个螺旋臂内的SNII的数量除以从恒星形成事件的SNII的总数，提供了一个约束的大小超新星遗迹（SNR）的浓度在宇宙射线传播模型试图解释PAMELA异常。尽管在旋臂内的恒星形成的浓度，该模型预测的SNII事件实际上发生在臂间区域的大部分，并呼吁质疑SNR浓度的假设，Sznov等人。
英文摘要：
A model is presented to estimate the fraction of Supernova Type-II events (SNII) occurring inside vs. outside a spiral arm for a given star formation episode. The probability distribution function (PDF) for this fraction is given for use in models similar to those of Shaviv et al. [13][11]. The calculated PDF for the SNII fraction, SNII_{in/total}, defined as the number of SNII inside a spiral arm divided by the total number of SNII from a star formation event, provides a constraint on the magnitude of supernova remnant (SNR) concentrations used in cosmic ray propagation models attempting to explain the PAMELA anomaly. Despite the concentration of star formation within spiral arms, this model predicts the majority of SNII events actually occur in inter-arm regions and calls into question the SNR concentration assumption of Shaviv et al.
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