J-PAS：暗物质-暗能量弹性耦合的预测
J-PAS: Forecasts for dark matter - dark energy elastic couplings
摘要：
我们考虑一个宇宙学模型，其中暗物质和暗能量的特征耦合只影响它们在相应的欧拉方程中的动量传递。我们执行一个适合宇宙学观测，并确认以前的研究结果在这些情况下，有利于耦合的存在下，在$3σ$以上。这种改善是由Sunyaev-Zeldovich数据驱动的。随后，我们进行了预测，未来的J-PAS数据，发现聚类测量将允许清楚地辨别存在的相互作用在百分之几的水平与解耦的情况下，在超过$10σ$时，完整的调查，覆盖$8500$平方。度，考虑了我们发现，列入弱透镜测量将无助于进一步约束耦合参数。为了完整性，我们比较预测DESI和欧几里得，这提供了类似的鉴别力。
英文摘要：
We consider a cosmological model where dark matter and dark energy feature a coupling that only affects their momentum transfer in the corresponding Euler equations. We perform a fit to cosmological observables and confirm previous findings within these scenarios that favour the presence of a coupling at more than $3σ$. This improvement is driven by the Sunyaev-Zeldovich data. We subsequently perform a forecast for future J-PAS data and find that clustering measurements will permit to clearly discern the presence of an interaction within a few percent level with the uncoupled case at more than $10σ$ when the complete survey, covering $8500$ sq. deg., is considered. We found that the inclusion of weak lensing measurements will not help to further constrain the coupling parameter. For completeness, we compare to forecasts for DESI and Euclid, which provide similar discriminating power.
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