论文标题

ATACAMA宇宙学望远镜:从运动和热Sunyaev-Zel'Dovich测量的老板CMASS星系中的气体热力学建模

The Atacama Cosmology Telescope: Modeling the Gas Thermodynamics in BOSS CMASS galaxies from Kinematic and Thermal Sunyaev-Zel'dovich Measurements

论文作者

Amodeo, Stefania, Battaglia, Nicholas, Schaan, Emmanuel, Ferraro, Simone, Moser, Emily, Aiola, Simone, Austermann, Jason E., Beall, James A., Bean, Rachel, Becker, Daniel T., Bond, Richard J., Calabrese, Erminia, Calafut, Victoria, Choi, Steve K., Denison, Edward V., Devlin, Mark, Duff, Shannon M., Duivenvoorden, Adriaan J., Dunkley, Jo, Dünner, Rolando, Gallardo, Patricio A., Hall, Kirsten R., Han, Dongwon, Hill, J. Colin, Hilton, Gene C., Hilton, Matt, Hložek, Renée, Hubmayr, Johannes, Huffenberger, Kevin M., Hughes, John P., Koopman, Brian J., MacInnis, Amanda, McMahon, Jeff, Madhavacheril, Mathew S., Moodley, Kavilan, Mroczkowski, Tony, Naess, Sigurd, Nati, Federico, Newburgh, Laura B., Niemack, Michael D., Page, Lyman A., Partridge, Bruce, Schillaci, Alessandro, Sehgal, Neelima, Sifón, Cristóbal, Spergel, David N., Staggs, Suzanne, Storer, Emilie R., Ullom, Joel N., Vale, Leila R., van Engelen, Alexander, Van Lanen, Jeff, Vavagiakis, Eve M., Wollack, Edward J., Xu, Zhilei

论文摘要

星系,组和群集的热力学和运动学Sunyaev-Zel'Dovich效应(TSZ,KSZ)探测了星系,组和群集的边界和簇内培养基(CGM和ICM)的热力学特性,因为它们分别与沿沿沿线的集成电子压力和动量相比是比例的。我们使用在同伴论文中获得的KSZ和TSZ信号的新测量值对Baryon振荡光谱调查(BOSS)中CMASS星系的气体热力学的限制进行了限制。结合KSZ和TSZ测量值,我们在模型中测量能量注入$εm_\ star c^2 $的幅度,其中$ m_ \ star $是恒星质量,为$ε=(40 \ pm9)\ pm9)\ times10^{ - 6} $ $ $ _______________________________ (2 $σ$),表明病毒半径内的总压力的20%是由于非热成分引起的。我们使用KSZ测量的最佳拟合密度曲线来估计将重子纳入弱透明星系互相关测量的效果。我们的估计值将原始理论模型与Arxiv中的弱透明星系互相关测量之间的差异:1611.08606降低了一半,但并未完全调和。将TSZ测量值与宇宙学模拟进行比较,我们发现模拟低估了大半径的CGM压力,而与KSZ测量值相比,它们的表现更好。这表明通过模拟中的反馈模型注入的能量我们比较了与这些半径上的气体充分加热。在较小的半径上,我们没有发现明显的分歧。这些测量结果提供了当前和未来模拟的新型测试。这项工作证明了关节,高信噪比KSZ和TSZ观察的力量,未来的互相关研究将改善。

The thermal and kinematic Sunyaev-Zel'dovich effects (tSZ, kSZ) probe the thermodynamic properties of the circumgalactic and intracluster medium (CGM and ICM) of galaxies, groups, and clusters, since they are proportional, respectively, to the integrated electron pressure and momentum along the line-of-sight. We present constraints on the gas thermodynamics of CMASS galaxies in the Baryon Oscillation Spectroscopic Survey (BOSS) using new measurements of the kSZ and tSZ signals obtained in a companion paper. Combining kSZ and tSZ measurements, we measure within our model the amplitude of energy injection $εM_\star c^2$, where $M_\star$ is the stellar mass, to be $ε=(40\pm9)\times10^{-6}$, and the amplitude of the non-thermal pressure profile to be $α_{\rm Nth}<0.2$ (2$σ$), indicating that less than 20% of the total pressure within the virial radius is due to a non-thermal component. We estimate the effects of including baryons in the modeling of weak-lensing galaxy cross-correlation measurements using the best-fit density profile from the kSZ measurement. Our estimate reduces the difference between the original theoretical model and the weak-lensing galaxy cross-correlation measurements in arXiv:1611.08606 by half but does not fully reconcile it. Comparing the tSZ measurements to cosmological simulations, we find that simulations underestimate the CGM pressure at large radii while they fare better in comparison with the kSZ measurements. This suggests that the energy injected via feedback models in the simulations that we compared against does not sufficiently heat the gas at these radii. We do not find significant disagreement at smaller radii. These measurements provide novel tests of current and future simulations. This work demonstrates the power of joint, high signal-to-noise kSZ and tSZ observations, upon which future cross-correlation studies will improve.

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