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Time-Dependent Corrections to the Ly-alpha Escape Probability During Cosmological Hydrogen Recombination
J. Chluba, R. A. Sunyaev
We consider the effects connected with the detailed radiative transfer during the epoch of cosmological recombination on the ionization history of our Universe. We focus on the esc…
Rico: An Accurate Cosmological Recombination Code
W. A. Fendt, J. Chluba, J. A. Rubino-Martin +1
We present Rico, a code designed to compute the ionization fraction of the Universe during the epoch of hydrogen and helium recombination with an unprecedented combination of speed…
Evolution of low-frequency features in the CMB spectrum due to stimulated Compton scattering and Doppler-broadening
J. Chluba, R. A. Sunyaev
We discuss a new solution of the Kompaneets-equation for physical situations in which low frequency photons, forming relatively narrow spectral details, are Compton scattered in an…
Pre-recombinational energy release and narrow features in the CMB spectrum
J. Chluba, R. A. Sunyaev
Energy release in the early Universe (z<~ 2x10^6) should lead to some broad spectral distortion of the cosmic microwave background (CMB) radiation field, which can be characterized…
The Richness and Beauty of the Physics of Cosmological Recombination: The Contributions from Helium
R. A. Sunyaev, J. Chluba
The physical ingredients to describe the epoch of cosmological recombination are amazingly simple and well-understood. This fact allows us to take into account a very large variety…
Lines in the cosmic microwave background spectrum from the epoch of cosmological helium recombination
J. A. Rubino-Martin, J. Chluba, R. A. Sunyaev
The main goal of this work is to calculate the contributions to the cosmological recombination spectrum due to bound-bound transitions of helium. We show that due to the presence o…
The Richness and Beauty of the Physics of Cosmological Recombination
R. A. Sunyaev, J. Chluba
The physical ingredients to describe the epoch of cosmological recombination are amazingly simple and well-understood. This fact allows us to take into account a very large variety…
Is there a need and another way to measure the Cosmic Microwave Background temperature more accurately?
J. Chluba, R. A. Sunyaev
The recombination history of the Universe depends exponentially on the temperature, T_0, of the cosmic microwave background. Therefore tiny changes of T_0 are expected to lead to s…
Two-photon transitions in hydrogen and cosmological recombination
J. Chluba, R. A. Sunyaev
We study the two-photon process for the transitions ns --> 1s and nd --> 1s in hydrogen up to large n. For n<=20 we provide simple analytic fitting formulae to describe the non-res…
Cosmological hydrogen recombination: Lyn line feedback and continuum escape
J. Chluba, R. A. Sunyaev
We compute the corrections to the cosmological hydrogen recombination history due to delayed feedback of Lyman-series photons and the escape in the Lyman-continuum. The former proc…
The double Compton emissivity in a mildly relativistic thermal plasma within the soft photon limit
J. Chluba, S. Yu. Sazonov, R. A. Sunyaev
We provide simple and accurate analytic approximations for the low frequency double Compton emission coefficient that are applicable in a broad range of physical situations up to m…
Free-bound emission from cosmological hydrogen recombination
J. Chluba, R. A. Sunyaev
In this paper we compute the emission coming from the direct recombination of free electrons to a given shell (n>=2) during the epoch of cosmological hydrogen recombination. This c…
Cosmological hydrogen recombination: populations of the high level sub-states
J. Chluba, J. A. Rubino-Martin, R. A. Sunyaev
We present results for the spectral distortions of the Cosmic Microwave Background (CMB) arising due to bound-bound transitions during the epoch of cosmological hydrogen recombinat…
Lines in the Cosmic Microwave Background Spectrum from the Epoch of Cosmological Hydrogen Recombination
J. A. Rubino-Martin, J. Chluba, R. A. Sunyaev
We compute the spectral distortions of the Cosmic Microwave Background (CMB) arising during the epoch of cosmological hydrogen recombination within the standard cosmological (conco…
Clusters of galaxies in the microwave band: influence of the motion of the Solar System
J. Chluba, G. Huetsi, R. A. Sunyaev
In this work we consider the changes of the SZ cluster brightness, flux and number counts induced by the motion of the Solar System with respect to the frame defined by the cosmic…
Superposition of blackbodies and the dipole anisotropy: A possibility to calibrate CMB experiments
J. Chluba, R. A. Sunyaev
The CMB angular temperature fluctuations observed by COBE and WMAP enable us to place a lower limit on the spectral distortions of the CMB at any angular scale. These distortions a…
Kinetic Sunyaev-Zeldovich effect from galaxy cluster rotation
J. Chluba, K. Mannheim
We show how the temperature and the polarisation of the cosmic microwave background are affected by bulk rotation of clusters of galaxies owing to the kinetic Sunyaev-Zeldovich eff…