arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.05558astro-ph.COastro-ph.GA
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阿塔卡玛宇宙望远镜(Atacama Cosmology Telescope):基于运动学和热测量的BOSS CMASS星系气体热力学模拟

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

Stefania Amodeo, Nicholas Battaglia, Emmanuel Schaan, Simone Ferraro, Emily Moser, Simone Aiola, Jason E. Austermann, James A. Beall, Rachel Bean, Daniel T. Bec… 展开作者

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

摘要:

热和运动学的Sunyaev-Zel'dovich效应(tSZ,kSZ)探测星系、星系群和星系团的环星系和星系团内介质(CGM和ICM)的热力学性质,因为它们分别与沿视线的积分电子压力和动量成比例。我们提出的约束CMASS星系的气体热力学的重子振荡光谱调查(BOSS)使用新的测量的kSZ和tSZ信号中获得的配套文件。结合kSZ和tSZ测量,我们在我们的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,是$ε=(40\pm9)\times10^{-6}$,和非热压力曲线的幅度是$α_{\rm Nth}<0.2$(2 $σ$),表明维里半径内的总压力的不到20%是由于非热分量。我们估计的影响,包括重子在弱透镜星系互相关测量的建模使用最佳拟合密度分布的kSZ测量。我们的估计减少了原来的理论模型和arXiv:1611.08606中的弱透镜星系互相关测量值之间的差异的一半,但并没有完全调和it. Comparing的tSZ测量宇宙学模拟,我们发现,模拟低估了CGM的压力在大半径,而他们的票价更好地与kSZ测量相比。这表明,在我们比较的模拟中,通过反馈模型注入的能量不能充分加热这些半径的气体。我们在较小的半径上没有发现显着的分歧。这些测量为当前和未来的模拟提供了新的测试。这项工作展示了联合,高信噪比kSZ和tSZ观测的力量,未来的互相关研究将得到改善。

英文摘要:

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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