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We study a covariant formalism for the Sunyaev-Zeldovich effects developed in the previous papers by the present authors, and derive analytic expressions for the redistribution functions in the Thomson approximation. We also explore another…

Cosmology and Nongalactic Astrophysics · Physics 2010-12-21 Satoshi Nozawa , Yasuharu Kohyama , Naoki Itoh

We study the Sunyaev-Zeldovich effect for clusters of galaxies. The Boltzmann equations for the CMB photon distribution function are studied in three Lorentz frames. We clarify the relations of the SZ effects among the different Lorentz…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 Satoshi Nozawa , Yasuharu Kohyama

We study the generalized Kompaneets equation (kinetic equation for the photon distribution function taking into account the Compton scattering by electrons) using a relativistically covariant formalism. Using the generalized Kompaneets…

Astrophysics · Physics 2011-02-11 Naoki Itoh , Yasuharu Kohyama , Satoshi Nozawa

We present an extension of the Kompaneets equation which allows relativistic effects to be included to any desired order. Using this, we are able to obtain simple analytic forms for the spectral changes due to the Sunyaev-Zel'dovich effect…

Astrophysics · Physics 2009-10-30 A. D. Challinor , A. N. Lasenby

Based upon the rate equations for the photon distribution function obtained in the previous paper, we study the formal solutions in three different representation forms for the Sunyaev-Zeldovich effect. By expanding the formal solution in…

Cosmology and Nongalactic Astrophysics · Physics 2009-07-30 Satoshi Nozawa , Yasuharu Kohyama , Naoki Itoh

Starting from a covariant formalism of the Sunyaev-Zeldovich effect for the thermal and non-thermal distributions, we derive the frequency redistribution function identical to Wright's method assuming the smallness of the photon energy (in…

Cosmology and Nongalactic Astrophysics · Physics 2009-11-06 Satoshi Nozawa , Yasuharu Kohyama

We extend the formalism of the relativistic thermal and kinematic Sunyaev-Zel'dovich effects and include the polarization of the cosmic microwave background photons. We consider the situation that a cluster of galaxies is moving with a…

Astrophysics · Physics 2015-06-24 Naoki Itoh , Satoshi Nozawa , Yasuharu Kohyama

We extend the formalism of the relativistic thermal and kinematical Sunyaev-Zeldovich effects to the observer's system (the Solar System) moving with a velocity $\beta_{S}$ with respect to the cosmic microwave background radiation. We…

Astrophysics · Physics 2009-11-10 Satoshi Nozawa , Naoki Itoh , Yasuharu Kohyama

The relaxation of a photon bath to thermal equilibrium via Compton scattering with electrons is described in the Kompaneets equation (1956). The equation is mostly known from studies of astrophysical plasmas, for its convergence to the…

Cosmology and Nongalactic Astrophysics · Physics 2022-08-18 Guilherme Eduardo Freire Oliveira , Christian Maes , Kasper Meerts

We compare relativistic approximation methods, which describe gravitational instability in the expanding universe, in a spherically symmetric model. Linear perturbation theory, second-order perturbation theory, relativistic Zel'dovich…

Astrophysics · Physics 2014-10-13 Masaaki Morita , Kouji Nakamura , Masumi Kasai

The Sunyaev-Zeldovich (SZ) effect is a window into the astrophysical processes of galaxy clusters, and relativistic corrections (the "rSZ") promise to provide a global census of the gas feedback within clusters. Upcoming wide-field…

Cosmology and Nongalactic Astrophysics · Physics 2025-10-13 L. Kuhn , Z. Li , William R. Coulton

We study the Sunyaev-Zeldovich effect for clusters of galaxies. The Boltzmann equations for the cosmic microwave background photon distribution function are studied in three Lorentz frames. We extend the previous work and derive analytic…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-18 Satoshi Nozawa , Yasuharu Kohyama

The use of galaxy clusters as precision cosmological probes relies on an accurate determination of their masses. However, inferring the relationship between cluster mass and observables from direct observations is difficult and prone to…

Weak gravitational lensing and the Sunyaev-Zel'dovich effect provide complementary information on the composition of clusters of galaxies. Preliminary results from cluster SZ observations with the Very Small Array are presented. A Bayesian…

Astrophysics · Physics 2007-05-23 P. J. Marshall , K. Lancaster , M. P. Hobson , K. J. B. Grainge

We investigate the impact of relativistic SZ corrections on Planck measurements of massive galaxy clusters, finding that they have a significant impact at the $\approx$5 -- 15% and up to $\approx 3\sigma$ level. We investigate the…

Cosmology and Nongalactic Astrophysics · Physics 2024-11-21 Yvette C. Perrott

Thermal Sunyaev-Zel'dovich effect is one of the recent probes of cosmology and large scale structures. We update constraints on cosmological parameters from galaxy clusters observed by the Planck satellite in a first attempt to combine…

Cosmology and Nongalactic Astrophysics · Physics 2018-06-06 Laura Salvati , Marian Douspis , Nabila Aghanim

Populations of relativistic electrons in clusters of galaxies should imprint a characteristic spectral distortion signature on the Cosmic Microwave Background photons - the relativistic Sunyaev-Zeldovich (SZ) effect. We investigate how…

Astrophysics · Physics 2007-05-23 Torsten A. Ensslin , Steen H. Hansen

We show that Kompaneetz equation describing photon diffusion in an environment of an electron gas, when linearized around its equilibrium distribution, coincides with the relativistic diffusion discussed in recent publications. The model of…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 Z. Haba

The long-wavelength approximation and the truncated Taylor expansion are frequently used in the theory of relativistic Coulomb excitation to obtain multipole expansions of the interaction. It is shown in this note that these two…

Nuclear Theory · Physics 2009-11-07 B. F. Bayman , F. Zardi

Upcoming millimeter experiments that probe the cosmic microwave background (CMB) will observe tens of thousands of galaxy clusters through the thermal Sunyaev-Zeldovich (tSZ) effect. tSZ selected clusters are powerful probes of cosmological…

Cosmology and Nongalactic Astrophysics · Physics 2019-10-02 Dylan Cromer , Nicholas Battaglia , Mathew S. Madhavacheril
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