Atacama Cosmology Telescope: Modeling the gas thermodynamics in BOSS CMASS galaxies from kinematic and thermal Sunyaev-Zel’dovich measurements-猫眼课题宝

DOI：

10.1103/physrevd.103.063514

发表时间：

2020-09

期刊：

Monthly Notices of the Royal Astronomical Society

影响因子：

4.8

通讯作者：

中科院分区：

物理与天体物理2区

文献类型：

作者：

S. Amodeo;N. Battaglia;E. Schaan;S. Ferraro;E. Moser;S. Aiola;J. Austermann;J. Beall;R. Bean;D. Becker;R. Bond;E. Calabrese;Victoria Calafut;Steve K. Choi;E. Denison;M. Devlin;S. Duff;A. Duivenvoorden;J. Dunkley;R. Dunner;P. Gallardo;K. Hall;Dongwon Han;J. Hill;G. Hilton;M. Hilton;R. Hlovzek;J. Hubmayr;K. Huffenberger;J. Hughes;B. Koopman;Amanda Macinnis;J. McMahon;M. Madhavacheril;K. Moodley;T. Mroczkowski;S. Naess;F. Nati;L. Newburgh;M. Niemack;L. Page;B. Partridge;A. Schillaci;N. Sehgal;C. Sif'on;D. Spergel;S. Staggs;E. Storer;J. Ullom;L. Vale;A. V. Engelen;J. Lanen;E. Vavagiakis;Edward J. Wollack;Zhilei Xu

热的和运动学的Sunyaev-Zel'dovich效应（tSZ, kSZ）探测了星系、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方向的综合电子压力和动量成正比。我们利用在另一篇论文中获得的kSZ和tSZ信号的新测量结果，提出了重子振荡光谱调查（BOSS）中CMASS星系气体热力学的约束。结合kSZ和tSZ测量，我们在模型中测量能量注入的振幅$\epsilon M_\star c^2$，其中$M_\star$是恒星质量，为$\epsilon=(33^{+2}_{-5})\times10^{-6}$，非热压力剖面的振幅为$\alpha_{\rm Nth}=0.30^{+0.06}_{-0.07}$，表明30% 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 (50% at most), but does not fully reconcile it. Comparing the kSZ and tSZ measurements to cosmological simulations, we find that they under predict the CGM pressure and to a lesser extent the CGM density at larger radii. 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.

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 $\epsilon M_\star c^2$, where $M_\star$ is the stellar mass, to be $\epsilon=(33^{+2}_{-5})\times10^{-6}$, and the amplitude of the non-thermal pressure profile to be $\alpha_{\rm Nth}=0.30^{+0.06}_{-0.07}$, indicating that 30% 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 (50% at most), but does not fully reconcile it. Comparing the kSZ and tSZ measurements to cosmological simulations, we find that they under predict the CGM pressure and to a lesser extent the CGM density at larger radii. 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.

Atacama Cosmology Telescope: Modeling the gas thermodynamics in BOSS CMASS galaxies from kinematic and thermal Sunyaev-Zel’dovich measurements

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