论文标题

原始黑洞暗物质模拟使用Popsycle

Primordial Black Hole Dark Matter Simulations Using PopSyCLE

论文作者

Pruett, K., Dawson, W., Medford, M. S., Lam, C., Lu, J. R., Perkins, S., McGill, P., Golovich, N., Chapline, G.

论文摘要

据推测,原始的黑洞(PBHS)被认为是早期宇宙的,被认为是可行的暗物质形式。如果存在,则应通过以银河系重力对恒星的重力微覆化的光度和天体信号来检测它们。紧凑型镜头事件或Popsycle的种群合成是一种模拟代码,它使用户能够模拟微透镜调查,并且是第一个包括光度法和星形微透镜效应的同类构图,这对于潜在的PBH检测和表征非常重要。为了估计可观察到的PBH微透镜事件的数量,我们将Popsycle修改为包括由PBH组成的暗物质光环。我们详细介绍了我们的PBH人群模型,并通过模拟OGLE-IV和ROMAN MICLANING调查来证明我们的Popsycle + PBH结果。我们提供了将PBH添加到Popsycle中的概念证明分析,因此包括许多简化的假设,例如$ f _ {\ text {dm}} $,PBHS组成的深色物质和由$ \ bar {m} _ {\ bar {m} _ {\ text _ {\ text {pbh {pbh}} $ pb pb pb。 Assuming $\bar{m}_{\text{PBH}}=30$ $M_{\odot}$, we find $\sim$ 3.6$f_{\text{DM}}$ times as many PBH microlensing events than stellar evolved black hole events, a PBH average peak Einstein crossing time of $\sim$ 91.5 days,估计$ 10^2f _ {\ text {dm}} $ pbh事件在8年的OGLE-IV结果中的估计,并估计罗曼以检测$ \ sim $ 1,000 $ 1,000 $ f _ {\ text {dm}} $ PBH Microlensing Everest在整个计划中的微验证调查中。

Primordial black holes (PBHs), theorized to have originated in the early universe, are speculated to be a viable form of dark matter. If they exist, they should be detectable through photometric and astrometric signals resulting from gravitational microlensing of stars in the Milky Way. Population Synthesis for Compact-object Lensing Events, or PopSyCLE, is a simulation code that enables users to simulate microlensing surveys, and is the first of its kind to include both photometric and astrometric microlensing effects, which are important for potential PBH detection and characterization. To estimate the number of observable PBH microlensing events we modify PopSyCLE to include a dark matter halo consisting of PBHs. We detail our PBH population model, and demonstrate our PopSyCLE + PBH results through simulations of the OGLE-IV and Roman microlensing surveys. We provide a proof-of-concept analysis for adding PBHs into PopSyCLE, and thus include many simplifying assumptions, such as $f_{\text{DM}}$, the fraction of dark matter composed of PBHs, and $\bar{m}_{\text{PBH}}$, mean PBH mass. Assuming $\bar{m}_{\text{PBH}}=30$ $M_{\odot}$, we find $\sim$ 3.6$f_{\text{DM}}$ times as many PBH microlensing events than stellar evolved black hole events, a PBH average peak Einstein crossing time of $\sim$ 91.5 days, estimate on order of $10^2f_{\text{DM}}$ PBH events within the 8 year OGLE-IV results, and estimate Roman to detect $\sim$ 1,000$f_{\text{DM}}$ PBH microlensing events throughout its planned microlensing survey.

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