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arXiv 0902.3219astro-ph.CO
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强引力透镜探测暗物质的粒子性质

Strong gravitational lensing probes of the particle nature of dark matter

Leonidas A. Moustakas, Kevork Abazajian, Andrew Benson, Adam S. Bolton, James S. Bullock, Jacqueline Chen, Edward Cheng, Dan Coe, Arthur B. Congdon, Neal Dalal,… 展开作者

Leonidas A. Moustakas, Kevork Abazajian, Andrew Benson, Adam S. Bolton, James S. Bullock, Jacqueline Chen, Edward Cheng, Dan Coe, Arthur B. Congdon, Neal Dalal, Juerg Diemand, Benjamin M. Dobke, Greg Dobler, Olivier Dore, Aaron Dutton, Richard Ellis, Chris D. Fassnacht, Henry Ferguson, Douglas Finkbeiner, Raphael Gavazzi, Fredrick William High, Tesla Jeltema, Eric Jullo, Manoj Kaplinghat, Charles R. Keeton, Jean-Paul Kneib, Leon V. E. Koopmans, Savvas M. Koushiappas, Michael Kuhlen, Alexander Kusenko, Charles R. Lawrence, Abraham Loeb, Piero Madau, Phil Marshall, R. Ben Metcalf, Priya Natarajan, Joel R. Primack, Stefano Profumo, Michael D. Seiffert, Josh Simon, Daniel Stern, Louis Strigari, James E. Taylor, Randall Wayth, Joachim Wambsganss, Risa Wechsler, Andrew Zentner

摘要:

在粒子物理学的标准模型的扩展范围之内和之外,有一个庞大的动物园,可以作为暗物质的成分。这些候选者中的每一个都可能具有散射(和其他)横截面特性,这些特性与暗物质丰度、BBN和物质功率谱中的大多数尺度一致;但是在亚银河系“截止”尺度下可能具有截然不同的行为,低于该尺度,暗物质密度波动被平滑。要想定量测量亚银河系尺度上超出本机宇宙的功率谱行为,甚至是整个宇宙时间内的功率谱行为,唯一的方法是通过多重成像的强引力透镜中的探测器。由暗物质子结构引起的引力位扰动,在强透镜中对观测到的相对放大率、位置和时间延迟进行了信息编码。这些都是敏感的不同时刻的子结构质量函数和不同的有效质量范围的子结构。时间延迟扰动,特别是,被证明是在很大程度上免疫的退化和系统的不确定性,影响了利用强镜头进行此类研究。有很大的潜力,协调的理论和观测工作,使先进的利用强引力透镜作为直接探测暗物质的属性。这一机会激发了这份白皮书,并推动了以下需求:a)对理解不同暗物质候选者的所有天体物理后果所需的理论工作的强有力支持; b)量身定制的观测活动,甚至是完全专用的任务,以获得必要的数据。

英文摘要:

There is a vast menagerie of plausible candidates for the constituents of dark matter, both within and beyond extensions of the Standard Model of particle physics. Each of these candidates may have scattering (and other) cross section properties that are consistent with the dark matter abundance, BBN, and the most scales in the matter power spectrum; but which may have vastly different behavior at sub-galactic "cutoff" scales, below which dark matter density fluctuations are smoothed out. The only way to quantitatively measure the power spectrum behavior at sub-galactic scales at distances beyond the local universe, and indeed over cosmic time, is through probes available in multiply imaged strong gravitational lenses. Gravitational potential perturbations by dark matter substructure encode information in the observed relative magnifications, positions, and time delays in a strong lens. Each of these is sensitive to a different moment of the substructure mass function and to different effective mass ranges of the substructure. The time delay perturbations, in particular, are proving to be largely immune to the degeneracies and systematic uncertainties that have impacted exploitation of strong lenses for such studies. There is great potential for a coordinated theoretical and observational effort to enable a sophisticated exploitation of strong gravitational lenses as direct probes of dark matter properties. This opportunity motivates this white paper, and drives the need for: a) strong support of the theoretical work necessary to understand all astrophysical consequences for different dark matter candidates; and b) tailored observational campaigns, and even a fully dedicated mission, to obtain the requisite data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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